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Hello Boys & Girls (and anyone in between).

I recently had a little spare time, so I thought it would be fun to do some latex band testing.

The purpose of the testing was to simply get an IDEA of how much power latex bands could generate when using different band thicknesses,

straight and tapered band cuts and using different sized ball bearings.

I also wanted to get an IDEA of how much draw weight it would take to generate this power. I say IDEA because as everyone knows, this is not an exact science.

I just wanted to create my own set of data that I could always refer back to in the future.

In order to achieve the set of data that I wanted, I had to make sure that when I draw the pouch back to my anchor point,

which is currently my ear, the band was as close to maximum stretch as I dare.

On a fun day, if I just want to smash cans with a heavy setup and I don't care about band life, then I can use these band results just as they are,

or even reduce their active length a tiny bit more for even more power.

Otherwise, I can simply increase the active length of my chosen straight or tapered band, until I achieve my desired results for a combination of power,

draw weight, ball bearing size, and of course, band life.

I can also use this set of data to search for light setups too. I can find the lowest draw weight results and then once again, simply increase the active length

until I achieve my desired results for a combination of power, draw weight, ball bearing size, and of course, band life.

I can also use this set of data to get an IDEA of the difference in potential between different latex band brands,

different thicknesses, different tapers, tapers versus straight band cuts and different sized ball bearings.

Bottom line, my set of data provides me with all the information I will ever need for anything I will ever wish to do.

So, I decided to copy and paste my results here, just in case anyone else could use this set of data.

TESTING

I tested 3 different brands of latex and included every thickness they had to offer:

Sumeike 0.40 - 0.45 - 0.50 - 0.55 - 0.60 - 0.65 - 0.70

Precise 3rd Generation 0.40 - 0.45 - 0.50 - 0.55 - 0.60 - 0.65 - 0.70 - 0.75

SoBong Taichi 0.40 - 0.50 - 0.60 - 0.70

I tested 23 different straight and tapered band cuts ranging from 30mm down to 3/8 inch.

To keep it simple, I tested the band cuts in imperial, along with the three band cuts shown in metric.

When converted to metric, they include close to all the sizes that I have ever seen.

Straight: 30mm - 30mm, 1 - 1, 7/8 - 7/8, 3/4 - 3/4, 5/8 - 5/8, 1/2 - 1/2, 3/8 - 3/8.

1/8 inch Tapers: 1 - 7/8, 7/8 - 3/4, 3/4 - 5/8, 5/8 - 1/2, 1/2 - 3/8.

1/4 inch Tapers: 30mm - 25mm, 1 - 3/4, 7/8 - 5/8, 3/4 - 1/2, 5/8 - 3/8.

3/8 inch Tapers: 30mm - 20mm, 1 - 5/8, 7/8 - 1/2, 3/4 - 3/8.

1/2 inch Tapers: 1 - 1/2, 7/8 - 3/8.

If anyone is interested in an economical way of carrying out testing like this, then let me show you what I did.

I cut 3 pairs of bands; 30mm - 30mm, 30mm - 20mm and 7/8 - 5/8.

The idea is to start with the largest band cut and then reduce the length and taper down to the next smaller cut.

Set 1). 30 - 30, then 30 - 25, 1 - 1, 1 - 7/8, 7/8 - 7/8, 7/8 - 3/4, 3/4 - 3/4, 3/4 - 5/8, 5/8 - 5/8, 5/8 - 1/2, 1/2 - 1/2, 1/2 - 3/8, 3/8 - 3/8.

Set 2). 30 - 20, then 1 - 3/4, 1 - 5/8, 1 - 1/2, 7/8 - 1/2, 3/4 - 1/2, 3/4 - 3/8, 5/8 - 3/8.

Set 3). 7/8 - 5/8, then 7/8 - 3/8.

Whenever I encountered breaking bands, I would simply cut a new band set to that size and carry on.

I also tested all the ball bearing ammo sizes that I am interested in, which are 6mm, 7mm, 8mm & 9.5mm.

TESTING METHOD

1). I cut the pair of bands, attach the pouch and then attach the band set to my OTT slingshot.

I test to make sure that when I draw back with ammo in the pouch, it feels like the band is stretched to as close to maximum as I dare.

I may have to reduce the length by a couple of mm's or so in order to fine tune this.

2). I will then remove the band set from the slingshot and then attach it to the testing rig. The testing rig has been made to replicate my 30.5 inch draw.

Here is a crude 2-minute video of my testing rig if you are interested.

3). I hook the digital luggage scales onto the pouch, and then pull back and hook it onto the clamp. This replicates my 30.5 inch draw length.

Of course, these are just digital luggage scales, but all I want is an IDEA of the draw weight, which is fine.

I record the result exactly as it appears on the digital luggage scales.

4). I then load a 6mm ball bearing into the pouch and then pull it back and insert it into the trigger release mechanism, which also replicates my 30.5 inch draw length.

I hold for about 2 seconds and then fire the 6mm ball bearing over the chronograph. I do this 3 times in total and then record the average result.

I then repeat the same process for 7mm, 8mm and 9.5mm ball bearings.

There are 3 reasons why I use the testing rig:

1). It provides consistency in draw length and pouch release, which in turn provides consistency in results.

2). It prevents me from accidentally hitting the chronograph and causing unnecessary damage to it.

3). It provides a great platform to test the draw weight.

Oh yes…and once I remove the clamp and attach my Red Dot Sight…it turns into something much more fun!

Here is a crude 30-second video if you are interested.

I have separated the 3 sets of latex band testing results into 3 separate threads because of the lengthy results.

I recommend that you view them in the following order:

Test Results: Sumeike, Precise & SoBong…Part 1 - Sumeike

Test Results: Sumeike, Precise & SoBong…Part 2 - Precise

Test Results: Sumeike, Precise & SoBong…Part 3 - SoBong

So here are the results for Sumeike 0.40 to 0.70.

Column 1 = Band cut with ball bearing ammo size.

Column 2 = Average speed in Feet Per Second (FPS)

Column 3 = Draw Weight in pounds (lbs), exactly as it appears on the digital luggage scales.

Column 4 = Temperature indoors, which was always the same.

I don't include the actual length of the band in the results for 2 reasons.

1). We all have different draw lengths.

2). The band length could be 10mm or more out because of the natural stretch increase over time.

Besides, we all know when we have pulled the band to or close to maximum stretch.

SUMEIKE 0.40

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 11.02 20 / 64

Ammo - 6mm 242

Ammo - 7mm 234

Ammo - 8mm 222

Ammo - 9.5mm 199

1 - 1 inch 10.49 20 / 64

Ammo - 6mm 252

Ammo - 7mm 238

Ammo - 8mm 224

Ammo - 9.5mm 185

7/8 - 7/8 inch 9.81 20 / 64

Ammo - 6mm 251

Ammo - 7mm 235

Ammo - 8mm 200

Ammo - 9.5mm 177

3/4 - 3/4 inch 8.72 20 / 64

Ammo - 6mm 245

Ammo - 7mm 228

Ammo - 8mm 196

Ammo - 9.5mm 171

5/8 - 5/8 inch 8.52 20 / 64

Ammo - 6mm 237

Ammo - 7mm 205

Ammo - 8mm 183

Ammo - 9.5mm 180

1/2 - 1/2 inch 6.13 20 / 64

Ammo - 6mm 221

Ammo - 7mm 198

Ammo - 8mm 183

Ammo - 9.5mm 162

3/8 - 3/8 inch 4.30 20 / 64

Ammo - 6mm 197

Ammo - 7mm 183

Ammo - 8mm 169

Ammo - 9.5mm 144

TAPERED - 1/8 inch

1 - 7/8 inch 10.61 20 / 64

Ammo - 6mm 264

Ammo - 7mm 249

Ammo - 8mm 234

Ammo - 9.5mm 200

7/8 - 3/4 inch 8.75 20 / 64

Ammo - 6mm 255

Ammo - 7mm 240

Ammo - 8mm 219

Ammo - 9.5mm 190

3/4 - 5/8 inch 8.97 20 / 64

Ammo - 6mm 249

Ammo - 7mm 215

Ammo - 8mm 211

Ammo - 9.5mm 181

5/8 - 1/2 inch 7.20 20 / 64

Ammo - 6mm 243

Ammo - 7mm 223

Ammo - 8mm 204

Ammo - 9.5mm 173

1/2 - 3/8 inch 5.50 20 / 64

Ammo - 6mm 224

Ammo - 7mm 204

Ammo - 8mm 187

Ammo - 9.5mm 158

TAPERED - 1/4 inch

30mm - 25mm 11.15 20 / 64

Ammo - 6mm 260

Ammo - 7mm 250

Ammo - 8mm 233

Ammo - 9.5mm 206

1 - 3/4 inch 8.40 20 / 64

Ammo - 6mm 249

Ammo - 7mm 233

Ammo - 8mm 217

Ammo - 9.5mm 188

7/8 - 5/8 inch 10.22 20 / 64

Ammo - 6mm 270

Ammo - 7mm 251

Ammo - 8mm 227

Ammo - 9.5mm 195

3/4 - 1/2 inch 7.55 20 / 64

Ammo - 6mm 252

Ammo - 7mm 232

Ammo - 8mm 211

Ammo - 9.5mm 178

5/8 - 3/8 inch 6.50 20 / 64

Ammo - 6mm 239

Ammo - 7mm 220

Ammo - 8mm 198

Ammo - 9.5mm 167

TAPERED - 3/8 inch

30mm - 20mm 9.79 20 / 64

Ammo - 6mm 255

Ammo - 7mm 241

Ammo - 8mm 227

Ammo - 9.5mm 197

1 - 5/8 inch 7.91 20 / 64

Ammo - 6mm 260

Ammo - 7mm 241

Ammo - 8mm 223

Ammo - 9.5mm 190

7/8 - 1/2 inch 7.81 20 / 64

Ammo - 6mm 265

Ammo - 7mm 241

Ammo - 8mm 218

Ammo - 9.5mm 184

3/4 - 3/8 inch 7.85 20 / 64

Ammo - 6mm 258

Ammo - 7mm 236

Ammo - 8mm 211

Ammo - 9.5mm 178

TAPERED - 1/2 inch

1 - 1/2 inch 7.84 20 / 64

Ammo - 6mm 266

Ammo - 7mm 245

Ammo - 8mm 221

Ammo - 9.5mm 187

7/8 - 3/8 inch 9.58 20 / 64

Ammo - 6mm 270

Ammo - 7mm 247

Ammo - 8mm 223

Ammo - 9.5mm 187

SUMEIKE 0.45

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 11.35 20 / 64

Ammo - 6mm 229

Ammo - 7mm 220

Ammo - 8mm 198

Ammo - 9.5mm 182

1 - 1 inch 9.84 20 / 64

Ammo - 6mm 248

Ammo - 7mm 238

Ammo - 8mm 214

Ammo - 9.5mm 177

7/8 - 7/8 inch 9.36 20 / 64

Ammo - 6mm 239

Ammo - 7mm 212

Ammo - 8mm 183

Ammo - 9.5mm 160

3/4 - 3/4 inch 8.33 20 / 64

Ammo - 6mm 239

Ammo - 7mm 201

Ammo - 8mm 183

Ammo - 9.5mm 159

5/8 - 5/8 inch 9.02 20 /64

Ammo - 6mm 226

Ammo - 7mm 189

Ammo - 8mm 170

Ammo - 9.5mm 156

1/2 - 1/2 inch 6.17 20 / 64

Ammo - 6mm 200

Ammo - 7mm 168

Ammo - 8mm 149

Ammo - 9.5mm 151

3/8 - 3/8 inch 6.79 20 / 64

Ammo - 6mm 189

Ammo - 7mm 173

Ammo - 8mm 159

Ammo - 9.5mm 139

TAPERED - 1/8 inch

1 - 7/8 inch 10.26 20 / 64

Ammo - 6mm 264

Ammo - 7mm 246

Ammo - 8mm 232

Ammo - 9.5mm 201

7/8 - 3/4 inch 8.92 20 / 64

Ammo - 6mm 267

Ammo - 7mm 252

Ammo - 8mm 234

Ammo - 9.5mm 202

3/4 - 5/8 inch 8.11 20 / 64

Ammo - 6mm 250

Ammo - 7mm 228

Ammo - 8mm 203

Ammo - 9.5mm 180

5/8 - 1/2 inch 9.10 20 / 64

Ammo - 6mm 229

Ammo - 7mm 198

Ammo - 8mm 176

Ammo - 9.5mm 167

1/2 - 3/8 inch 6.96 20 / 64

Ammo - 6mm 217

Ammo - 7mm 199

Ammo - 8mm 180

Ammo - 9.5mm 151

TAPERED - 1/4 inch

30mm - 25mm 11.37 20 / 64

Ammo - 6mm 254

Ammo - 7mm 252

Ammo - 8mm 235

Ammo - 9.5mm 216

1 - 3/4 inch 7.70 20 / 64

Ammo - 6mm 248

Ammo - 7mm 237

Ammo - 8mm 224

Ammo - 9.5mm 195

7/8 - 5/8 inch 7.33 20 / 64

Ammo - 6mm 257

Ammo - 7mm 241

Ammo - 8mm 224

Ammo - 9.5mm 191

3/4 - 1/2 inch 6.37 20 / 64

Ammo - 6mm 258

Ammo - 7mm 238

Ammo - 8mm 215

Ammo - 9.5mm 181

5/8 - 3/8 inch 5.65 20 / 64

Ammo - 6mm 244

Ammo - 7mm 222

Ammo - 8mm 199

Ammo - 9.5mm 166

TAPERED - 3/8 inch

30mm - 20mm 9.19 20 / 64

Ammo - 6mm 254

Ammo - 7mm 243

Ammo - 8mm 230

Ammo - 9.5mm 202

1 - 5/8 inch 7.67 20 / 64

Ammo - 6mm 264

Ammo - 7mm 249

Ammo - 8mm 230

Ammo - 9.5mm 196

7/8 - 1/2 inch 6.74 20 / 64

Ammo - 6mm 265

Ammo - 7mm 244

Ammo - 8mm 223

Ammo - 9.5mm 185

3/4 - 3/8 inch 5.83 20 / 64

Ammo - 6mm 255

Ammo - 7mm 233

Ammo - 8mm 205

Ammo - 9.5mm 176

TAPERED - 1/2 inch

1 - 1/2 inch 7.23 20 / 64

Ammo - 6mm 275

Ammo - 7mm 255

Ammo - 8mm 232

Ammo - 9.5mm 192

7/8 - 3/8 inch 6.24 20 / 64

Ammo - 6mm 272

Ammo - 7mm 246

Ammo - 8mm 218

Ammo - 9.5mm 182

SUMEIKE 0.50

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 11.53 20 / 64

Ammo - 6mm 235

Ammo - 7mm 229

Ammo - 8mm 223

Ammo - 9.5mm 207

1 - 1 inch 10.80 20 / 64

Ammo - 6mm 257

Ammo - 7mm 245

Ammo - 8mm 238

Ammo - 9.5mm 212

7/8 - 7/8 inch 9.45 20 / 64

Ammo - 6mm 259

Ammo - 7mm 248

Ammo - 8mm 233

Ammo - 9.5mm 206

3/4 - 3/4 inch 8.50 20 / 64

Ammo - 6mm 263

Ammo - 7mm 247

Ammo - 8mm 231

Ammo - 9.5mm 198

5/8 - 5/8 inch 7.45 20 / 64

Ammo - 6mm 252

Ammo - 7mm 236

Ammo - 8mm 219

Ammo - 9.5mm 187

1/2 - 1/2 inch 7.44 20 / 64

Ammo - 6mm 241

Ammo - 7mm 223

Ammo - 8mm 206

Ammo - 9.5mm 178

3/8 - 3/8 inch 7.15 20 / 64

Ammo - 6mm 205

Ammo - 7mm 178

Ammo - 8mm 174

Ammo - 9.5mm 158

TAPERED - 1/8 inch

1 - 7/8 inch 10.48 20 / 64

Ammo - 6mm 252

Ammo - 7mm 243

Ammo - 8mm 231

Ammo - 9.5mm 203

7/8 - 3/4 inch 9.59 20 / 64

Ammo - 6mm 258

Ammo - 7mm 245

Ammo - 8mm 227

Ammo - 9.5mm 200

3/4 - 5/8 inch 8.35 20 / 64

Ammo - 6mm 273

Ammo - 7mm 257

Ammo - 8mm 237

Ammo - 9.5mm 204

5/8 - 1/2 inch 7.95 20 / 64

Ammo - 6mm 262

Ammo - 7mm 241

Ammo - 8mm 219

Ammo - 9.5mm 188

1/2 - 3/8 inch 7.30 20 / 64

Ammo - 6mm 250

Ammo - 7mm 228

Ammo - 8mm 209

Ammo - 9.5mm 176

TAPERED - 1/4 inch

30mm - 25mm 11.44 20 / 64

Ammo - 6mm 245

Ammo - 7mm 238

Ammo - 8mm 230

Ammo - 9.5mm 209

1 - 3/4 inch 10.00 20 / 64

Ammo - 6mm 266

Ammo - 7mm 255

Ammo - 8mm 241

Ammo - 9.5mm 213

7/8 - 5/8 inch 8.85 20 / 64

Ammo - 6mm 270

Ammo - 7mm 254

Ammo - 8mm 236

Ammo - 9.5mm 203

3/4 - 1/2 inch 7.74 20 / 64

Ammo - 6mm 265

Ammo - 7mm 248

Ammo - 8mm 227

Ammo - 9.5mm 195

5/8 - 3/8 inch 9.38 20 / 64

Ammo - 6mm 265

Ammo - 7mm 241

Ammo - 8mm 218

Ammo - 9.5mm 186

TAPERED - 3/8 inch

30mm - 20mm 10.74 20 / 64

Ammo - 6mm 263

Ammo - 7mm 254

Ammo - 8mm 241

Ammo - 9.5mm 215

1 - 5/8 inch 9.94 20 / 64

Ammo - 6mm 284

Ammo - 7mm 269

Ammo - 8mm 251

Ammo - 9.5mm 216

7/8 - 1/2 inch 8.54 20 / 64

Ammo - 6mm 280

Ammo - 7mm 262

Ammo - 8mm 240

Ammo - 9.5mm 206

3/4 - 3/8 inch 8.17 20 / 64

Ammo - 6mm 277

Ammo - 7mm 255

Ammo - 8mm 230

Ammo - 9.5mm 192

TAPERED - 1/2 inch

1 - 1/2 inch 9.61 20 / 64

Ammo - 6mm 305

Ammo - 7mm 280

Ammo - 8mm 254

Ammo - 9.5mm 214

7/8 - 3/8 inch 8.61 20 / 64

Ammo - 6mm 300

Ammo - 7mm 273

Ammo - 8mm 245

Ammo - 9.5mm 204

SUMEIKE 0.55

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 12.84 20 / 64

Ammo - 6mm 238

Ammo - 7mm 234

Ammo - 8mm 227

Ammo - 9.5mm 213

1 - 1 inch 12.38 20 / 64

Ammo - 6mm 266

Ammo - 7mm 258

Ammo - 8mm 244

Ammo - 9.5mm 218

7/8 - 7/8 inch 11.60 20 / 64

Ammo - 6mm 267

Ammo - 7mm 257

Ammo - 8mm 240

Ammo - 9.5mm 204

3/4 - 3/4 inch 11.00 20 / 64

Ammo - 6mm 262

Ammo - 7mm 243

Ammo - 8mm 209

Ammo - 9.5mm 182

5/8 - 5/8 inch 8.80 20 / 64

Ammo - 6mm 235

Ammo - 7mm 212

Ammo - 8mm 199

Ammo - 9.5mm 178

1/2 - 1/2 inch 8.00 20 / 64

Ammo - 6mm 234

Ammo - 7mm 217

Ammo - 8mm 191

Ammo - 9.5mm 175

3/8 - 3/8 inch 7.47 20 / 64

Ammo - 6mm 212

Ammo - 7mm 197

Ammo - 8mm 178

Ammo - 9.5mm 163

TAPERED - 1/8 inch

1 - 7/8 inch 9.50 20 / 64

Ammo - 6mm 223

Ammo - 7mm 217

Ammo - 8mm 211

Ammo - 9.5mm 194

7/8 - 3/4 inch 9.41 20 / 64

Ammo - 6mm 238

Ammo - 7mm 232

Ammo - 8mm 216

Ammo - 9.5mm 193

3/4 - 5/8 inch 10.00 20 / 64

Ammo - 6mm 271

Ammo - 7mm 255

Ammo - 8mm 238

Ammo - 9.5mm 205

5/8 - 1/2 inch 9.40 20 / 64

Ammo - 6mm 258

Ammo - 7mm 239

Ammo - 8mm 221

Ammo - 9.5mm 192

1/2 - 3/8 inch 9.35 20 / 64

Ammo - 6mm 251

Ammo - 7mm 231

Ammo - 8mm 212

Ammo - 9.5mm 183

TAPERED - 1/4 inch

30mm - 25mm 10.37 20 / 64

Ammo - 6mm 213

Ammo - 7mm 209

Ammo - 8mm 205

Ammo - 9.5mm 190

1 - 3/4 inch 11.23 20 / 64

Ammo - 6mm 290

Ammo - 7mm 279

Ammo - 8mm 260

Ammo - 9.5mm 227

7/8 - 5/8 inch 10.74 20 / 64

Ammo - 6mm 282

Ammo - 7mm 264

Ammo - 8mm 248

Ammo - 9.5mm 214

3/4 - 1/2 inch 9.28 20 / 64

Ammo - 6mm 278

Ammo - 7mm 260

Ammo - 8mm 239

Ammo - 9.5mm 207

5/8 - 3/8 inch 6.55 20 / 64

Ammo - 6mm 260

Ammo - 7mm 239

Ammo - 8mm 217

Ammo - 9.5mm 181

TAPERED - 3/8 inch

30mm - 20mm 12.30 20 / 64

Ammo - 6mm 282

Ammo - 7mm 272

Ammo - 8mm 258

Ammo - 9.5mm 230

1 - 5/8 inch 9.09 20 / 64

Ammo - 6mm 245

Ammo - 7mm 236

Ammo - 8mm 225

Ammo - 9.5mm 200

7/8 - 1/2 inch 10.28 20 / 64

Ammo - 6mm 295

Ammo - 7mm 276

Ammo - 8mm 252

Ammo - 9.5mm 221

3/4 - 3/8 inch 7.30 20 / 64

Ammo - 6mm 271

Ammo - 7mm 250

Ammo - 8mm 226

Ammo - 9.5mm 190

TAPERED - 1/2 inch

1 - 1/2 inch 8.57 20 / 64

Ammo - 6mm 265

Ammo - 7mm 251

Ammo - 8mm 233

Ammo - 9.5mm 200

7/8 - 3/8 inch 7.86 20 / 64

Ammo - 6mm 275

Ammo - 7mm 255

Ammo - 8mm 230

Ammo - 9.5mm 191

SUMEIKE 0.60

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 11.17 20 / 64

Ammo - 6mm 160

Ammo - 7mm 166

Ammo - 8mm 166

Ammo - 9.5mm 163

1 - 1 inch 9.52 20 / 64

Ammo - 6mm 180

Ammo - 7mm 179

Ammo - 8mm 176

Ammo - 9.5mm 170

7/8 - 7/8 inch 9.07 20 / 64

Ammo - 6mm 195

Ammo - 7mm 193

Ammo - 8mm 190

Ammo - 9.5mm 179

3/4 - 3/4 inch 8.75 20 / 64

Ammo - 6mm 213

Ammo - 7mm 208

Ammo - 8mm 203

Ammo - 9.5mm 173

5/8 - 5/8 inch 7.45 20 / 64

Ammo - 6mm 223

Ammo - 7mm 217

Ammo - 8mm 206

Ammo - 9.5mm 171

1/2 - 1/2 inch 7.11 20 / 64

Ammo - 6mm 235

Ammo - 7mm 221

Ammo - 8mm 182

Ammo - 9.5mm 169

3/8 - 3/8 inch 5.68 20 / 64

Ammo - 6mm 222

Ammo - 7mm 201

Ammo - 8mm 188

Ammo - 9.5mm 162

TAPERED - 1/8 inch

1 - 7/8 inch 9.46 20 / 64

Ammo - 6mm 192

Ammo - 7mm 189

Ammo - 8mm 186

Ammo - 9.5mm 177

7/8 - 3/4 inch 9.05 20 / 64

Ammo - 6mm 208

Ammo - 7mm 205

Ammo - 8mm 199

Ammo - 9.5mm 183

3/4 - 5/8 inch 8.33 20 / 64

Ammo - 6mm 227

Ammo - 7mm 220

Ammo - 8mm 211

Ammo - 9.5mm 177

5/8 - 1/2 inch 7.22 20 / 64

Ammo - 6mm 239

Ammo - 7mm 228

Ammo - 8mm 210

Ammo - 9.5mm 183

1/2 - 3/8 inch 6.23 20 / 64

Ammo - 6mm 249

Ammo - 7mm 230

Ammo - 8mm 211

Ammo - 9.5mm 176

TAPERED - 1/4 inch

30mm - 25mm 10.07 20 / 64

Ammo - 6mm 179

Ammo - 7mm 176

Ammo - 8mm 175

Ammo - 9.5mm 162

1 - 3/4 inch 8.97 20 / 64

Ammo - 6mm 190

Ammo - 7mm 188

Ammo - 8mm 182

Ammo - 9.5mm 175

7/8 - 5/8 inch 8.86 20 / 64

Ammo - 6mm 219

Ammo - 7mm 213

Ammo - 8mm 206

Ammo - 9.5mm 188

3/4 - 1/2 inch 8.06 20 / 64

Ammo - 6mm 238

Ammo - 7mm 222

Ammo - 8mm 211

Ammo - 9.5mm 191

5/8 - 3/8 inch 7.41 20 / 64

Ammo - 6mm 265

Ammo - 7mm 248

Ammo - 8mm 226

Ammo - 9.5mm 191

TAPERED - 3/8 inch

30mm - 20mm 9.51 20 / 64

Ammo - 6mm 187

Ammo - 7mm 183

Ammo - 8mm 179

Ammo - 9.5mm 170

1 - 5/8 inch 8.55 20 / 64

Ammo - 6mm 212

Ammo - 7mm 204

Ammo - 8mm 199

Ammo - 9.5mm 184

7/8 - 1/2 inch 8.23 20 / 64

Ammo - 6mm 236

Ammo - 7mm 227

Ammo - 8mm 216

Ammo - 9.5mm 194

3/4 - 3/8 inch 7.65 20 / 64

Ammo - 6mm 263

Ammo - 7mm 248

Ammo - 8mm 230

Ammo - 9.5mm 196

TAPERED - 1/2 inch

1 - 1/2 inch 8.33 20 / 64

Ammo - 6mm 234

Ammo - 7mm 225

Ammo - 8mm 214

Ammo - 9.5mm 194

7/8 - 3/8 inch 7.90 20 / 64

Ammo - 6mm 257

Ammo - 7mm 241

Ammo - 8mm 227

Ammo - 9.5mm 196

SUMEIKE 0.65

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 15.66 20 / 64

Ammo - 6mm 228

Ammo - 7mm 224

Ammo - 8mm 215

Ammo - 9.5mm 214

1 - 1 inch 15.00 20 / 64

Ammo - 6mm 250

Ammo - 7mm 242

Ammo - 8mm 241

Ammo - 9.5mm 225

7/8 - 7/8 inch 14.13 20 / 64

Ammo - 6mm 262

Ammo - 7mm 255

Ammo - 8mm 251

Ammo - 9.5mm 221

3/4 - 3/4 inch 12.12 20 / 64

Ammo - 6mm 260

Ammo - 7mm 247

Ammo - 8mm 219

Ammo - 9.5mm 196

5/8 - 5/8 inch 10.83 20 / 64

Ammo - 6mm 245

Ammo - 7mm 228

Ammo - 8mm 218

Ammo - 9.5mm 184

1/2 - 1/2 inch 10.45 20 / 64

Ammo - 6mm 256

Ammo - 7mm 239

Ammo - 8mm 209

Ammo - 9.5mm 176

3/8 - 3/8 inch 9.25 20 / 64

Ammo - 6mm 230

Ammo - 7mm 200

Ammo - 8mm 196

Ammo - 9.5mm 178

TAPERED - 1/8 inch

1 - 7/8 inch 14.84 20 / 64

Ammo - 6mm 268

Ammo - 7mm 259

Ammo - 8mm 251

Ammo - 9.5mm 235

7/8 - 3/4 inch 13.24 20 / 64

Ammo - 6mm 277

Ammo - 7mm 274

Ammo - 8mm 259

Ammo - 9.5mm 234

3/4 - 5/8 inch 11.64 20 / 64

Ammo - 6mm 277

Ammo - 7mm 266

Ammo - 8mm 242

Ammo - 9.5mm 220

5/8 - 1/2 inch 11.20 20 / 64

Ammo - 6mm 273

Ammo - 7mm 258

Ammo - 8mm 243

Ammo - 9.5mm 203

1/2 - 3/8 inch 9.54 20 / 64

Ammo - 6mm 271

Ammo - 7mm 252

Ammo - 8mm 231

Ammo - 9.5mm 198

TAPERED - 1/4 inch 15.92 20 / 64

30mm - 25mm

Ammo - 6mm 248

Ammo - 7mm 243

Ammo - 8mm 235

Ammo - 9.5mm 228

1 - 3/4 inch 13.57 20 / 64

Ammo - 6mm 280

Ammo - 7mm 272

Ammo - 8mm 260

Ammo - 9.5mm 235

7/8 - 5/8 inch 12.70 20 / 64

Ammo - 6mm 290

Ammo - 7mm 280

Ammo - 8mm 262

Ammo - 9.5mm 227

3/4 - 1/2 inch 13.75 20 / 64

Ammo - 6mm 284

Ammo - 7mm 269

Ammo - 8mm 251

Ammo - 9.5mm 217

5/8 - 3/8 inch 7.91 20 / 64

Ammo - 6mm 257

Ammo - 7mm 242

Ammo - 8mm 225

Ammo - 9.5mm 195

TAPERED - 3/8 inch

30mm - 20mm 14.59 20 / 64

Ammo - 6mm 259

Ammo - 7mm 256

Ammo - 8mm 248

Ammo - 9.5mm 230

1 - 5/8 inch 13.04 20 / 64

Ammo - 6mm 304

Ammo - 7mm 292

Ammo - 8mm 277

Ammo - 9.5mm 240

7/8 - 1/2 inch 7.84 20 / 64

Ammo - 6mm 211

Ammo - 7mm 204

Ammo - 8mm 195

Ammo - 9.5mm 169

3/4 - 3/8 inch 7.76 20 / 64

Ammo - 6mm 242

Ammo - 7mm 231

Ammo - 8mm 219

Ammo - 9.5mm 190

TAPERED - 1/2 inch 13.70 20 / 64

1 - 1/2 inch

Ammo - 6mm 314

Ammo - 7mm 297

Ammo - 8mm 278

Ammo - 9.5mm 238

7/8 - 3/8 inch 7.64 20 / 64

Ammo - 6mm 229

Ammo - 7mm 218

Ammo - 8mm 209

Ammo - 9.5mm 187

SUMEIKE 0.70

STRAIGHT FPS DW lbs TEMP

30mm - 30mm 11.80 20 / 64

Ammo - 6mm 156

Ammo - 7mm 155

Ammo - 8mm 157

Ammo - 9.5mm 152

1 - 1 inch 10.45 20 / 64

Ammo - 6mm 170

Ammo - 7mm 169

Ammo - 8mm 166

Ammo - 9.5mm 162

7/8 - 7/8 inch 9.86 20 / 64

Ammo - 6mm 176

Ammo - 7mm 174

Ammo - 8mm 172

Ammo - 9.5mm 167

3/4 - 3/4 inch 8.65 20 / 64

Ammo - 6mm 136

Ammo - 7mm 151

Ammo - 8mm 180

Ammo - 9.5mm 162

5/8 - 5/8 inch 7.80 20 / 64

Ammo - 6mm 185

Ammo - 7mm 188

Ammo - 8mm 185

Ammo - 9.5mm 156

1/2 - 1/2 inch 6.23 20 / 64

Ammo - 6mm 203

Ammo - 7mm 197

Ammo - 8mm 185

Ammo - 9.5mm 154

3/8 - 3/8 inch 5.53 20 / 64

Ammo - 6mm 210

Ammo - 7mm 199

Ammo - 8mm 177

Ammo - 9.5mm 156

TAPERED - 1/8 inch

1 - 7/8 inch 9.96 20 / 64

Ammo - 6mm 176

Ammo - 7mm 174

Ammo - 8mm 172

Ammo - 9.5mm 165

7/8 - 3/4 inch 9.07 20 / 64

Ammo - 6mm 185

Ammo - 7mm 183

Ammo - 8mm 178

Ammo - 9.5mm 171

3/4 - 5/8 inch 8.29 20 / 64

Ammo - 6mm 193

Ammo - 7mm 188

Ammo - 8mm 185

Ammo - 9.5mm 161

5/8 - 1/2 inch 7.23 20 / 64

Ammo - 6mm 208

Ammo - 7mm 202

Ammo - 8mm 188

Ammo - 9.5mm 157

1/2 - 3/8 inch 6.62 20 / 64

Ammo - 6mm 224

Ammo - 7mm 213

Ammo - 8mm 195

Ammo - 9.5mm 170

TAPERED - 1/4 inch

30mm - 25mm 10.99 20 / 64

Ammo - 6mm 167

Ammo - 7mm 165

Ammo - 8mm 163

Ammo - 9.5mm 160

1 - 3/4 inch 9.40 20 / 64

Ammo - 6mm 178

Ammo - 7mm 175

Ammo - 8mm 171

Ammo - 9.5mm 157

7/8 - 5/8 inch 8.46 20 / 64

Ammo - 6mm 191

Ammo - 7mm 187

Ammo - 8mm 183

Ammo - 9.5mm 164

3/4 - 1/2 inch 7.65 20 / 64

Ammo - 6mm 196

Ammo - 7mm 193

Ammo - 8mm 182

Ammo - 9.5mm 157

5/8 - 3/8 inch 6.62 20 / 64

Ammo - 6mm 226

Ammo - 7mm 213

Ammo - 8mm 204

Ammo - 9.5mm 178

TAPERED - 3/8 inch

30mm - 20mm 10.65 20 / 64

Ammo - 6mm 184

Ammo - 7mm 180

Ammo - 8mm 175

Ammo - 9.5mm 168

1 - 5/8 inch 8.92 20 / 64

Ammo - 6mm 191

Ammo - 7mm 186

Ammo - 8mm 181

Ammo - 9.5mm 172

7/8 - 1/2 inch 7.85 20 / 64

Ammo - 6mm 198

Ammo - 7mm 192

Ammo - 8mm 188

Ammo - 9.5mm 158

3/4 - 3/8 inch 7.19 20 / 64

Ammo - 6mm 224

Ammo - 7mm 216

Ammo - 8mm 193

Ammo - 9.5mm 183

TAPERED - 1/2 inch

1 - 1/2 inch 8.23 20 / 64

Ammo - 6mm 201

Ammo - 7mm 192

Ammo - 8mm 187

Ammo - 9.5mm 172

7/8 - 3/8 inch 7.43 20 / 64

Ammo - 6mm 232

Ammo - 7mm 220

Ammo - 8mm 207

Ammo - 9.5mm 187

Based on this set of data, I can now create an endless amount of lists.

Now, remember that fun day that I mentioned, where I just want to smash cans with a heavy setup and I don't care about band life.

Well, I can use these band results just as they are, or even reduce their active length a tiny bit more for even more power.

The following 4 lists give me an IDEA of the power potential offered by the 4 different sized ball bearings.

Ammo - 6mm - FPS OF 270 AND ABOVE

FPS Band Cut DW Thickness

314 1 - 1/2 13.70 0.65

305 1 - 1/2 9.61 0.50

304 1 - 5/8 13.04 0.65

300 7/8 - 3/8 8.61 0.50

295 7/8 - 1/2 10.28 0.55

290 1 - 3/4 11.23 0.55

290 7/8 - 5/8 12.70 0.65

284 1 - 5/8 9.94 0.50

284 3/4 - 1/2 13.75 0.65

282 7/8 - 5/8 10.74 0.55

282 30 - 20 12.30 0.55

280 1 - 3/4 13.57 0.65

280 7/8 - 1/2 8.54 0.50

278 3/4 - 1/2 9.28 0.55

277 3/4 - 5/8 11.64 0.65

277 7/8 - 3/4 13.24 0.65

277 3/4 - 3/8 8.17 0.50

275 7/8 - 3/8 7.86 0.55

275 1 - 1/2 7.23 0.45

273 5/8 - 1/2 11.20 0.65

273 3/4 - 5/8 8.35 0.50

272 7/8 - 3/8 6.24 0.45

271 3/4 - 5/8 10.00 0.55

271 1/2 - 3/8 9.54 0.65

271 3/4 - 3/8 7.30 0.55

270 7/8 - 5/8 10.22 0.40

270 7/8 - 3/8 9.58 0.40

270 7/8 - 5/8 8.85 0.50

Ammo - 7mm - FPS OF 250 AND ABOVE

FPS Band Cut DW Thickness

297 1 - 1/2 13.70 0.65

292 1 - 5/8 13.04 0.65

280 1 - 1/2 9.61 0.50

280 7/8 - 5/8 12.70 0.65

279 1 - 3/4 11.23 0.55

276 7/8 - 1/2 10.28 0.55

274 7/8 - 3/4 13.24 0.65

273 7/8 - 3/8 8.61 0.50

272 1 - 3/4 13.57 0.65

272 30 - 20 12.30 0.55

269 1 - 5/8 9.94 0.50

269 3/4 - 1/2 13.75 0.65

266 3/4 - 5/8 11.64 0.65

264 7/8 - 5/8 10.74 0.55

262 7/8 - 1/2 8.54 0.50

260 3/4 - 1/2 9.28 0.55

259 1 - 7/8 14.84 0.65

258 5/8 - 1/2 11.20 0.65

258 1 - 1 12.38 0.55

257 3/4 - 5/8 8.35 0.50

257 7/8 - 7/8 11.60 0.55

256 30 - 20 14.59 0.65

255 3/4 - 5/8 10.00 0.55

255 7/8 - 7/8 14.13 0.65

255 1 - 1/2 7.23 0.45

255 7/8 - 3/8 7.86 0.55

255 3/4 - 3/8 8.17 0.50

255 1 - 3/4 10.00 0.50

254 7/8 - 5/8 8.85 0.50

254 30 - 20 10.74 0.50

252 1/2 - 3/8 9.54 0.65

252 30 - 25 11.37 0.45

252 7/8 - 3/4 8.92 0.45

251 1 - 1/2 8.57 0.55

251 7/8 - 5/8 10.22 0.40

250 30 - 25 11.15 0.40

250 3/4 - 3/8 7.30 0.55

Ammo - 8mm - FPS OF 230 AND ABOVE

FPS Band Cut DW Thickness

278 1 - 1/2 13.70 0.65

277 1 - 5/8 13.04 0.65

262 7/8 - 5/8 12.70 0.65

260 1 - 3/4 11.23 0.55

260 1 - 3/4 13.57 0.65

259 7/8 - 3/4 13.24 0.65

258 30 - 20 12.30 0.55

254 1 - 1/2 9.61 0.50

252 7/8 - 1/2 10.28 0.55

251 3/4 - 1/2 13.75 0.65

251 7/8 - 7/8 14.13 0.65

251 1 - 7/8 14.84 0.65

251 1 - 5/8 9.94 0.50

248 30 - 20 14.59 0.65

248 7/8 - 5/8 10.74 0.55

245 7/8 - 3/8 8.61 0.50

244 1 - 1 12.38 0.55

243 5/8 - 1/2 11.20 0.65

242 3/4 - 5/8 11.64 0.65

241 1 - 1 15.00 0.65

241 30 - 20 10.74 0.50

241 1 - 3/4 10.00 0.50

240 7/8 - 7/8 11.60 0.55

240 7/8 - 1/2 8.54 0.50

239 3/4 - 1/2 9.28 0.55

238 3/4 - 5/8 10.00 0.55

238 1 - 1 10.80 0.50

237 3/4 - 5/8 8.35 0.50

236 7/8 - 5/8 8.85 0.50

235 30 - 25 15.92 0.65

235 30 - 25 11.37 0.45

234 7/8 - 3/4 8.92 0.45

234 1 - 7/8 10.61 0.40

233 7/8 - 7/8 9.45 0.50

233 1 - 1/2 8.57 0.55

233 30 - 25 11.15 0.40

232 1 - 7/8 10.26 0.45

232 1 - 1/2 7.23 0.45

231 1/2 - 3/8 9.54 0.65

231 3/4 - 3/4 8.50 0.50

231 1 - 7/8 10.48 0.50

230 30 - 20 9.19 0.45

230 1 - 5/8 7.67 0.45

230 30 - 25 11.44 0.50

230 3/4 - 3/8 8.17 0.50

230 7/8 - 3/8 7.86 0.55

230 3/4 - 3/8 7.65 0.60

Ammo - 9.5mm - FPS OF 200 AND ABOVE

FPS Band Cut DW Thickness

240 1 - 5/8 13.04 0.65

238 1 - 1/2 13.70 0.65

235 1 - 7/8 14.84 0.65

235 1 - 3/4 13.57 0.65

234 7/8 - 3/4 13.24 0.65

230 30 - 20 14.59 0.65

230 30 - 20 12.30 0.55

228 30 - 25 15.92 0.65

227 1 - 3/4 11.23 0.55

227 7/8 - 5/8 12.70 0.65

225 1 - 1 15.00 0.65

221 7/8 - 7/8 14.13 0.65

221 7/8 - 1/2 10.28 0.55

220 3/4 - 5/8 11.64 0.65

218 1 - 1 12.38 0.55

217 3/4 - 1/2 13.75 0.65

216 1 - 5/8 9.94 0.50

216 30 - 25 11.37 0.45

215 30 - 20 10.74 0.50

214 30 - 30 15.66 0.65

214 7/8 - 5/8 10.74 0.55

214 1 - 1/2 9.61 0.50

213 30 - 30 12.84 0.55

213 1 - 3/4 10.00 0.50

212 1 - 1 10.80 0.50

209 30 - 25 11.44 0.50

207 3/4 - 1/2 9.28 0.55

207 30 - 30 11.53 0.50

206 7/8 - 7/8 9.45 0.50

206 7/8 - 1/2 8.54 0.50

206 30 - 25 11.15 0.40

205 3/4 - 5/8 10.00 0.55

204 7/8 - 7/8 11.60 0.55

204 3/4 - 5/8 8.35 0.50

204 7/8 - 3/8 8.61 0.50

203 5/8 - 1/2 11.20 0.65

203 7/8 - 5/8 8.85 0.50

203 1 - 7/8 10.48 0.50

202 30 - 20 9.19 0.45

202 7/8 - 3/4 8.92 0.45

201 1 - 7/8 10.26 0.45

200 1 - 7/8 10.61 0.40

200 7/8 - 3/4 9.59 0.50

200 1 - 5/8 9.09 0.55

200 1 - 1/2 8.57 0.55

Now, if I want to do the same again, but this time I only want to focus on straight band cuts for some reason,

then the following 4 lists give me an IDEA of the power potential offered by the 4 different sized ball bearings.

Ammo - 6mm - FPS FOR TOP 6 STRAIGHT BAND CUTS

267 7/8 - 7/8 11.60 0.55

266 1 - 1 12.38 0.55

263 3/4 - 3/4 8.50 0.50

262 3/4 - 3/4 11.00 0.55

262 7/8 - 7/8 14.13 0.65

260 3/4 - 3/4 12.12 0.65

Ammo - 7mm - FPS FOR TOP 6 STRAIGHT BAND CUTS

258 1 - 1 12.38 0.55

257 7/8 - 7/8 11.60 0.55

255 7/8 - 7/8 14.13 0.65

248 7/8 - 7/8 9.45 0.50

247 3/4 - 3/4 8.50 0.50

247 3/4 - 3/4 12.12 0.65

Ammo - 8mm - FPS FOR TOP 6 STRAIGHT BAND CUTS

251 7/8 - 7/8 14.13 0.65

244 1 - 1 12.38 0.55

241 1 - 1 15.00 0.65

240 7/8 - 7/8 11.60 0.55

238 1 - 1 10.80 0.50

233 7/8 - 7/8 9.45 0.50

Ammo - 9.5mm - FPS FOR TOP 6 STRAIGHT BAND CUTS

225 1 - 1 15.00 0.65

221 7/8 - 7/8 14.13 0.65

218 1 - 1 12.38 0.55

214 30 - 30 15.66 0.65

213 30 - 30 12.84 0.55

212 1 - 1 10.80 0.50

Remember when I said that I could also use this set of data to search for light setups too?

Well, I can find the lowest draw weight results and then simply increase the active length until I achieve

my desired results for a combination of power, draw weight, ball bearing size, and of course, band life.

We have 2 more lists below just for that very purpose.

Ammo - 6mm - FPS FOR DRAW WEIGHTS OF 6 AND BELOW

255 3/4 - 3/8 5.83 0.45

244 5/8 - 3/8 5.65 0.45

224 1/2 - 3/8 5.50 0.40

222 3/8 - 3/8 5.68 0.60

210 3/8 - 3/8 5.53 0.70

197 3/8 - 3/8 4.30 0.40

Ammo - 7mm - FPS FOR DRAW WEIGHTS OF 6 AND BELOW

233 3/4 - 3/8 5.83 0.45

222 5/8 - 3/8 5.65 0.45

204 1/2 - 3/8 5.50 0.40

201 3/8 - 3/8 5.68 0.60

199 3/8 - 3/8 5.53 0.70

183 3/8 - 3/8 4.30 0.40

This Sumeike 0.45 with a 3/4 - 3/8 taper just so happens to be the same light setup used by the chinese 2018 world slingshot champion (well, 18 - 10mm).

By the way, you may experience a slight increase in power when compared to my set of data.

Firstly, for all my testing, I used an over sized pouch which was really meant for 10 - 13mm ammo.

This was the only pouch I had which had big enough holes to fit all the different thicknesses of latex band.

All my other pouches had tiny holes. These pouches would have made me give up on the testing project very quickly.

Secondly, I did not cut the 10mm or so excess latex from the pouch end. This enabled me to re-use the latex.

NOW FOR SOME IDEAS

If you start with 3/8 inch at the pouch and you don't like the band life, then you can increase the active length.

If you are still not happy, then move up to 1/2 inch at the pouch end.

If you use 1/2 inch at the pouch and you don't like the band life, then you can increase the active length.

If you are still not happy, then move up to 5/8 inch at the pouch end.

If you use 5/8 inch at the pouch and you don't like the band life, then you can increase the active length.

If you are still not happy, then move up to 3/4 inch at the pouch end.

If you use 3/4 inch at the pouch and you don't like the band life, then you can increase the active length.

If you are still not happy, then move up to 7/8 inch at the pouch end.

Well, you get the idea.

And if you are not happy with the band life of tapered band cuts in general, then try doing the same thing with straight band cuts instead.

TESTING RIG

If anyone wants to build one of these, they are very simple.

If you look at the above video, you will see that you only really need 3 things:

1) A length of wood.

You only actually need the top length of wood. I originally made this to replicate the distance of my original anchor point, which was beneath my dominant eye.

But then I found out that I was equally comfortable using my ear as an anchor point too.

So, instead of making a second one to replicate my second anchor point, I just simply cut the top length of wood in half, opened it up a couple

of inches to 30.5 inches, and then screwed a second length of wood underneath to support the top length of wood, which had been cut into two.

It means that I can now simply switch between the 2 anchor points with just a few screws.

The length of wood I used was 1250mm, it is a little long because I like to rest the end on my shoulder when I use it. The other dimensions are 45mm x 20mm.

2). Slingshot.

A cheap OTT slingshot with screws on the forks for quick and easy attachment and removal of band sets.

The metal forks were secured to the plastic handle by a screw in the centre.

I simply removed the screw to separate the fork from the handle, and then attached the fork near one end of the length of wood with a nut and bolt.

3). Slingshot trigger release mechanism.

I simply attached this to the length of wood by using 4 nuts and bolts, at a distance equal to my draw length.

And that's it; you can customise it however you want.

You can also attach a red dot sight for even more fun!

Now, if you are still interested, you can move onto Test Results: Sumeike, Precise & SoBong…Part 2 - Precise
 

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Wow, you sure put some time & effort into this..........'Really appreciate it...Looks like anyone w/questions on bands - tapering - speed & draw weight should be able to find exactly how they need to cut bands to achieve the performance they need...…...Hope this is saved for future references.

Thanks again.
 

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Discussion Starter · #5 ·
Hey Guys,

Boomslang - Yes, I always see people asking questions related to information contained within this thread on forums.

I think over the years, this may help guide a few people in the right direction.

Projectile Pilot - lol

AKA Forgotten - Once again, you are welcome.
 

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This is by far the most thorough band speed test I have seen in this forum and I have read all the previous ones (which were using bands no longer in widespread use).

Thank you for doing this.
 

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Discussion Starter · #7 ·
Hey pinguinu01,

I have searched for a set of data like this, but I could never find it.

So I am glad that you have read all the previous related threads and can confirm that it really is not out there.

I would have been gutted if you had directed me to a thread that already contained this exact set of data.

It would mean that it was already out there but I had somehow missed it.

So thanks for that.
 

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Discussion Starter · #8 ·
Hey Guys,

Here are the results in word documents, just in case the threads mysteriously disappear in the future.
 

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Thanks for the Word Docs. I just checked the first one and it opened up fine for me. I'll be saving these for sure.

Last night I spent an hour looking at the numbers and hardly got started with all the learning.
 

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I've only got experience with the 0.7 but your numbers seem lower than mine, at least with 9.5mm since that's the lightest I'll occasionally shoot. The first couple tests I posted were with a much higher than normal elongation but even 7.25" active for about a 32" draw has 7/16" steel beating your 9.5mm speeds by almost 30 fps in some cases
 

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Northerner - You are welcome.

Hey Projectile Pilot,

Yes, that sounds about right.

Remember, my results are for a 30.5 inch draw, so I would expect your 32 inch draw to get faster speeds.

I would also expect someone with a 34 inch draw to get even faster speeds.

That is why someone on this forum gets 300 FPS with 9.5mm ball bearings using full butterfly.

It's because his draw length is longer still.

For a shorter draw, I would expect all the FPS results to move lower together.

For a longer draw, I would expect all the FPS results to move higher together.

And I would also expect the 23 band cut results to remain more or less in the same order too.
 

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Secretstallion....have you compared your freehand shooting to the machine shooting numbers? It would be interesting to see a few examples. I'm curious if the freehand produces a bit higher numbers. A machine release is completely dead. Freehand shooting can produce a bit more power from an active release and/or a frame flip.
 

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Discussion Starter · #13 ·
Hey Northerner,

Yes, you are correct in suggesting that freehand slingshot FPS numbers may be slightly higher than testing rig FPS numbers.

I found that when I shoot freehand over a chronograph, I subconsciously try to cheat or 'push' the FPS numbers higher.

This may include drawing back a little further, releasing the ball bearing straight away instead of waiting about 2 seconds like I would do

in real life for aiming purposes and flicking my wrist forward upon release.

So the problem with using freehand is that I could not trust my results because there was no consistency.

I could not replicate these little cheats exactly the same every single time, especially when I don't always know that I am doing it.

This is the whole reason I chose to use the testing rig.

So, like I mentioned in the thread, I used the testing rig to solve these problems and guarantee consistency in my results.

I could not cheat by drawing back any further than 30.5 inch.

I could not cheat by flicking my wrist forward.

And I released the ball bearing 2 seconds after loading which is exactly what I do when I shoot freehand.

Which means my testing rig release is not completely dead as you suggest, because that would also have to mean that my freehand shooting

is completely dead too, because it is the exact same 2 second hold before pouch release.

I mentioned in the threads that you should not be surprised if you get higher FPS numbers when compared to those shown in the set of data.

I mentioned I use an oversized 10-13mm testing pouch and I do not cut the excess 10mm or so of latex from the pouch end.

Well, when you throw in those little cheats I mentioned, you can see why you can achieve higher FPS numbers than those shown.

This is why I kept repeating that this is an IDEA of the FPS, etc.

As an example, once I finished all of my testing, I then cut a 3/4 - 3/8 Sumeike 0.45 band set and then attached it onto my freehand slingshot.

But this time, instead of using an oversized testing pouch meant for 10-13mm, I used a small aerodynamic pouch meant for 6-7mm ball bearings.

This time I also removed the 10mm or so excess latex from the pouch end. I then shot a 6mm ball bearing.

My set of data showed 255 FPS. This time, however, 301 FPS appeared on the chronograph, but I was not surprised.

It was a combination of using the correct sized pouch, removing the excess latex, inconsistent draw length, inconsistent pouch release

and subconscious flicking of the wrist to push my numbers higher.

So my testing rig ensures me consistency in results when comparing FPS, band thickness, band cuts, draw weight and ball bearing size.

The set of data gives you an IDEA of what to expect when using my exact set of test criteria.

You can either enjoy the slightly higher FPS that you may achieve when using the appropriate pouch and shooting freehand,

or you can choose to use a combination of band thickness, band cut, draw weight and ball bearing size to achieve your desired results.

The set of data is the starting point, the rest is where the fun starts.

I am glad you asked this great question because it gives me a chance to add this information just in case someone else is wondering the same thing.

I shall post this on the other 2 comment sections because it is such a great question.
 

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Secretstallion... I fully understand the great resource that this test data is. It compares apples-to-apples by duplicating the shot style. It let's us see what happens with changes to various band thicknesses, widths and ammo weights. This all helps us chose a more efficient band for a desired purpose. It was important to fully address PP's question from all angles, as you are now doing. All the machine shots will be slower than a freehand shot unless the shooter is collapsing their back tension at the moment of release (shooting error).

Wrist "flicking" is not really cheating. It's a shooting style that many use. I use the flip style even when shooting 50-75 yards. Duplicating the flip gives consistent results. We had one member who could hit bottle caps at 20 yards when flipping.

A "dead" testing rig refers to the completely static shot. The frame is fixed in position. The pouch hold is fixed. The pouch does not move backwards at all during the shot (after clamped in jaws). In comparison, some shooters will draw, pause and then use a pull-through release (active release). This gives more speed and sometimes helps with their accuracy by keeping the draw linear. Some shooters flip the frame and do well with accuracy.

To summarize, you have the following reasons why the machine is slower than freehand shots.

oversized pouch

oversized tabs at pouch

dead frame on machine

static pouch release

Thanks for doing the test to prove that the freehand shot is faster. I'm surprised at the huge difference. As said from the beginning, the data is an IDEA and a place to start when picking bands. It's a very valuable tool and the consistently slower numbers make it no less valuable. We all shoot a bit different so even if you freehand shot it would not guaranty the same numbers for the next shooter.

As a bit of a sidebar, I do all my testing freehand and it takes far too much time but does tell me what I am actually getting when I shoot. The shortfall of this method is that we are often limited to how much we can shoot the same each session. I like to rest a bit after a test and then recheck the numbers with a few shots later in the day or the next day. I flip during the test and flip when shooting at targets. I usually pick a spot past the chronograph to focus on and try to shoot as I always do. As for consistency here are some numbers I got last night. I use 10 shots because I don't trust myself like I would be able to trust a machine. The machine would save me a lot of time if I was comparing bands.

244, 246, 247, 245, 249, 246, 247, 245, 247, 247 - ave = 246 fps

274, 277,274,274, 276, 275, 276,278, 278, 277 - ave = 276 fps

Thanks again for all the numbers! The data saved me from wasting time with thick bands for small 1/4" and 5/16" ammo. The data also helped me see the big advantage of tapers.

One thing missing from the data would not be possible to record accurately. Shooters often wonder approx how many shots were possible from a bandcut at a set draw length. This info can have a bearing on band selection. Unfortunately, there are too many variables with shot count but enough tests could give an approx number that would take too much time to get.

As mentioned above, the other factor is the feel of the band. Lots of us enjoy the stretchy bands that don't feel like an overdrawn recurve bow (stack). It would take months to record the feel on each bandcut and then it would only be your opinion instead of a measurable fact. This topic can be chatted about in other forum posts. The numbers that I posted above were for Precise Orange .55mm - 5/8" x 7/16" x 7 1/4" with 5/16" and 1/4" ammo (32" draw). These bands were once a bit wider and didn't feel smooth and they shot a bit slower. I trimmed them down which reduced draw weight about 12 oz and increased speed a bit. The band went from feeling stiff to feeling much better. Personal opinion only.
 

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Discussion Starter · #16 ·
Hey Northerner,

Thanks for the great post. You ask questions that result in clarity to other members and you also bring clarity to the thread.

You have a way of helping me better answer other peoples posts, whether you are doing it accidentally or on purpose.

I may answer a question from Projectile Pilot and think that I have answered it fully. But then you ask me a question from a different angle

and I realise that maybe I had more to add.

I am in two minds whether to just hire you to keep this up!

You said that you do all your testing freehand.

You just reminded me of another reason why I used the testing rig.

I am taking a little time out from slingshot activities because all this intense testing made my thumb sore.

Can you imagine how bad it would have been if I had not used the testing rig for the shots.

I could never have finished the testing project.

Now that the hard work has been done, the testing rig has now served its purpose.

So I can now put it to one side, and just carry on any progress from here with a handheld slingshot like you, and focus on real numbers like you.

The consistency of your test numbers you got last night are great - You are probably the human equivalent of a testing rig.

I notice you got 276 FPS with your 1/4 inch ammo using Precise 0.55 with a 5/8 - 7/16 band cut.

My nearest equivalent would be 272 FPS with 6mm ammo using Precise 0.55 with a 5/8 - 1/2 band cut.

But your draw length is 1 1/2 inch longer than mine, so I can see that you could use a shorter active band length to produce more FPS if you wanted to.

So I can tell that you are combining elements to maintain a low draw weight and hopefully good band life...and 276 FPS is already great.

There is no point in shooting 300 FPS if the draw weight increases beyond your preference and the band snaps too soon.

For the record, the light setup that I seem to have gravitated towards is Sumeike 0.45 using a 3/4 - 3/8 band cut and shooting 6 & 7mm ball bearings.

I seem to like a 157mm active length which gives me 244 FPS for 6mm and 228 FPS for 7mm.

I can't explain it but it just feels great and has enough FPS for a 10 meter indoor target.

Although the active length will naturally stretch about another 10mm very quickly, which makes it feel even better.

This whole light setup is probably temporary until I get the time to play with other light setups.

For a heavy setup, I just attach a thicker set of bands (no preference) to my testing rig and attach my Red Dot Sight, watch it transform into a slingshot rifle,

and then just hit cans at crazy speeds with 6, 7, 8 & 9.5mm ball bearings.

I am not a prolific slingshooter, in other words, I don't do it all the time like a lot of you guys.

So I believe that other people will benefit more from the set of data than I will, but that is why I posted it.
 

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Hi Secretstallion... I made an embarrassing typo-error. The Gen2 Orange Precise that I tested is .50mm, not .55mm. I do have some .55mm Yellow Gen2 that feels great but most of the data was already posted here a while back. Once my Precise Gen2 supply gets low I will order some Gen3.

Yes, I'm intentionally bringing a bit more clarity to your excellent information to benefit everyone. Reading all this great data is almost overwhelming (in a good way).

I plan to cut the same 3/4 x 3/8 Pink Sum .45mm for my next set. My ammo preference is mainly 1/4" and 5/16" (haven't tried 7mm yet). My current mild bandset is Pink .45mm Sumeike at 20mm x 13mm x 195mm. I just clocked it at 243fps average with my 32" draw length and 1/4" steel ammo (6.35mm).
 

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Discussion Starter · #18 ·
Hey JPD-Madrid, I am glad to see your post.

Now, for those of you who don't know this member, he is Jinping Dai and he owns / co-owns a company called Slingshooting.com.

The main reason I was able to carry out my testing project was because Jinping Dai sells 140mm - 280mm samples of all the bands that I have tested.

I would never have carried out the testing project if I had to buy full rolls of all the bands, because I would have been left with many rolls that I would never use.

So I was able to buy exactly what i needed for testing, plus a little extra to use for when I finished my testing.

Now I did not mention this in the thread because it was my very first post / thread and nobody knew me. I did not want to come across as a spammer.

But I believe that now you have seen my threads, I would hope that I am now beyond suspicion.

Once I placed my first order with Jinping Dai, and he realised that i was on a testing mission, he became very supportive.

As well as the usual freebies you would expect, he gave me some free SoBong, pouch tying material and even reduced my postage costs on both my orders.

For the time being, I will stick to buying samples because that is what I prefer to do at the moment. I am not yet dedicated to any one brand or thickness.

I mention this because this could be useful for other members too. If I have wet your appetite and you would also like to try a variety of different bands, instead of just

buying a full roll of a certain band and risk not liking it, then this could be your perfect option.

So, for example, if you are in a playful testing mood, you could buy 8 different 250mm samples instead of one 2 meter roll of one band.

Or, if you want half a roll of one band, then order 4 x 250mm of one band and then ask for an uncut 1 meter length.

Well, you get the idea.

I also earn 20 points per day for logging into his site once a day.

Those points can then be used towards a maximum of 10% off regular orders (not including shipping costs).

And the remainder of the points can be used to buy freebies from his freebies section, which will be freely added to the regular order.

Points are valid for 4 months.

You can earn points various other ways too.

I found Jinping Dai on this forum and I know other members have also ordered from him too.

So he is someone credible who you can trust.

I get all my emails answered and my international deliveries arrive within 7 days.

Anyway, I have just been on his site and generated a referral link which I have posted below.

I have never done this before so I am curious to see what happens, and its a little fun too.

If you register to his site, you will currently receive 200 free points.

You can then also log into his site once per day and receive 20 points per day.

If my referral link is used, I receive 300 points after the referral user places an order successfully.

So lets see what happens.

Against regular orders, points are worth full points. So 300 points is worth $3.

Against freebie orders, points are worth half points. So 300 points are worth $1.50.

Now what can I buy with $1.50.......

https://slingshooting.com?ref=172&ip=OTAuMjAzLjU3LjUw
 

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Discussion Starter · #19 ·
Hey Northerner,

How did I miss the fact that you were using Gen 2. I thought you were using Gen 3 like me.

I thought I read your posts closely, I need to pay more attention.
 

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Great topic!

Can you show an ideal (approx is enough) Width / Taper / Elongation Ratio-(Active Length) / Thickness / PER ammo?

One for 6mm, one for 9,5 etc.

Read the topic and like the approach, was hesitating to tell my worries, but who knows, you might integrate few issues next time.

  • Elastics and companies come and go. It is hard to create brand related research that may become an evergreen data.
  • Temperature sensitivity and elongation factor is different for each elastics.
  • In practical life I choose bands based on my preferred ammo size and draw weight. The maximum draw weight I can handle within the desired accuracy range.
  • Lifespan and storage may alter quality of bands.
  • There is no guarantee that the quality of the materials are even and if changed than changed with notice.

Let me encourage you to create a summary / review that covers the basic principles of band selection for specific ammo. Many of us just looking for the take away message that is easy to digest and apply in practice.

Thank you again! For both of you to taking the time and effort. Thumbs up for the share!

Regards,

Tremo
 
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