Whew what a day. I was trying to sight in my Slingshot rifle today and that was quiet a effort. My shots where going from one side of the paper to the other and I could not work it out. I tried leveling the forks, changing scope rings, eliminating parallax error. I could not work out why my groups where so poor. I even watched Bill Hayes's video on how to shoot a sling shot and applied his release method to the trigger, no jerking motions and following thru (a USMC gunnery training video I got that from).
Some shots I was stacking them one on top of the other then the group would move 5 centimetres. "Wow what in blazes is this?" I thought. The last thing I noticed was there was some slop in the pica tinny rifle base. I had tightened it down to where I was afraid of snapping the screw. "No, this is no good" then I remembered seeing info on shimming scope rings for MOA (minutes of angle). So I looked it up and I found info on shimming a pica tinny rifle based on a AR-15. So I tried it. A piece of coke can cut to size and placed under and to the sides of the pica-tinny rail. So what you know? no more slop, no more extreme wind-age adjustments. Beautiful.
The groups started to stack on top of each other again. All of this was at ten yards and as Murphy's law would dictate my bandset snapped. It was the second one today. Each set got about forty to fifty shots. I was nearly at my wit's end with this rifle, thinking I had wasted my money or I was going to have to buy some expensive adjustable scope rings but luck would have it, the pica tinny was fixed with less than 1 cent worth of aluminium can.
Sorry, I don't want to show the groups I am too ashamed. They look like Swiss cheese.
The little bit of black in this picture is graphite to help the pouch slip cleanly from the mechanical release. The first bandset snapped and I thought it might be because of some silicon grease I applied. Turns out these bands only last for about 40-50 shot's. If these rolls of Sheshou guru 1mm continue like this I will try GZK 1mm next time.
Jeez, I learnt a'lot in 8 hours of trial and error.
Thank you you to all who read, like and comment on this post. Salutations to all.
PK.
It's a five to one ratio. 690mm draw length 138mm from being tied in at the forks (like flip clips) to the pouch . 50mm at the forks to 20 mm at the pouch. Factory made bands. They came with the upgraded forks. Sorry, shooting 8mm leads.
Whew what a day. I was trying to sight in my Slingshot rifle today and that was quiet a effort. My shots where going from one side of the paper to the other and I could not work it out. I tried leveling the forks, changing scope rings, eliminating parallax error. I could not work out why my groups where so poor. I even watched Bill Hayes's video on how to shoot a slingshot and applied his release method to the trigger, no jerking motions and following thru (a USMC gunnery training video I got that from).
Some shots I was stacking them one on top of the other then the group would move 5 centimetres. "Wow what in blazes is this?" I thought. The last thing I noticed was there was some slop in the pica tinny rifle base. I had tightened it down to where I was afraid of snapping the screw. "No, this is no good" then I remembered seeing info on shimming scope rings for MOA (minutes of angle). So I looked it up and I found info on shimming a pica tinny rifle based on a AR-15. So I tried it. A piece of coke can cut to size and placed under and to the sides of the pica-tinny rail. So what you know? no more slop, no more extreme wind-age adjustments. Beautiful.
The groups started to stack on top of each other again. All of this was at ten yards and as Murphy's law would dictate my bandset snapped. It was the second one today. Each set got about forty to fifty shots. I was nearly at my wit's end with this rifle, thinking I had wasted my money or I was going to have to buy some expensive adjustable scope rings but luck would have it, the pica tinny was fixed with less than 1 cent worth of aluminium can.
Sorry, I don't want to show the groups I am too ashamed. They look like Swiss cheese.
The little bit of black in this picture is graphite to help the pouch slip cleanly from the mechanical release. The first bandset snapped and I thought it might be because of some silicon grease I applied. Turns out these bands only last for about 40-50 shot's. If these rolls of Sheshou guru 1mm continue like this I will try GZK 1mm next time.
Jeez, I learnt a'lot in 8 hours of trial and error.
Thank you you to all who read, like and comment on this post. Salutations to all.
PK.
g,day Paul, even though my rifle is different to yours mate, my bandsets are snapping like yours are going by the photo. i dont just think its the extreme tapper,maybe the way the ammo and pouch are held in the release trigger understrain. because i am having trouble with some pouches that are good normally but with the pressure the bands are pulling the ammo through the centre hole in the pouch lucky i have a lot of different pouches mate, i am only getting 20 to 30 shots with my 19x9.5 tapper im going to go 16x12.5 take from one end give to the other and maybe extend active length 10mm. allso yousing tubes with a very light pouch havent broken a tube set yet mate though not the same power as flats with my single strain im having trouble with my mail thats why i didnt send personal message mate regards robbo. ps from all reports simple shot black is very good hard draw plenty of power.
well done Paul,that laminated strong stuff, i seen your post about mixing the bands that it didnt work out all trial and error mate.it would be interesting to see how 3x40mmx30mm worked out, even with the same active length its gotta give you more shots per band set and who nos weather more or less speed i think these slingshot rifles where made to test us. lol regards robbo
I got the message from the manufacturer and he said that is what they get, 30-50 shots with that band set. So the tapper is too aggressive. He was very pleased with the shimming and will suggest it to future customers. Great. Look's like a 3:2 tapper might be on the cards 50:33mm 3:2.
Here is picture of the shim I sent to the manufacturer: I screwed up a little. I put into place and pierced with a small pair of scissors and let the screws do the rest.
Whew what a day. I was trying to sight in my Slingshot rifle today and that was quiet a effort. My shots where going from one side of the paper to the other and I could not work it out. I tried leveling the forks, changing scope rings, eliminating parallax error. I could not work out why my groups where so poor. I even watched Bill Hayes's video on how to shoot a sling shot and applied his release method to the trigger, no jerking motions and following thru (a USMC gunnery training video I got that from).
Some shots I was stacking them one on top of the other then the group would move 5 centimetres. "Wow what in blazes is this?" I thought. The last thing I noticed was there was some slop in the pica tinny rifle base. I had tightened it down to where I was afraid of snapping the screw. "No, this is no good" then I remembered seeing info on shimming scope rings for MOA (minutes of angle). So I looked it up and I found info on shimming a pica tinny rifle based on a AR-15. So I tried it. A piece of coke can cut to size and placed under and to the sides of the pica-tinny rail. So what you know? no more slop, no more extreme wind-age adjustments. Beautiful.
The groups started to stack on top of each other again. All of this was at ten yards and as Murphy's law would dictate my bandset snapped. It was the second one today. Each set got about forty to fifty shots. I was nearly at my wit's end with this rifle, thinking I had wasted my money or I was going to have to buy some expensive adjustable scope rings but luck would have it, the pica tinny was fixed with less than 1 cent worth of aluminium can.
Sorry, I don't want to show the groups I am too ashamed. They look like Swiss cheese.
The little bit of black in this picture is graphite to help the pouch slip cleanly from the mechanical release. The first bandset snapped and I thought it might be because of some silicon grease I applied. Turns out these bands only last for about 40-50 shot's. If these rolls of Sheshou guru 1mm continue like this I will try GZK 1mm next time.
Jeez, I learnt a'lot in 8 hours of trial and error.
Thank you you to all who read, like and comment on this post. Salutations to all.
PK.
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