I have just started making my own bands, and have a question about natural latex versus synthetic elastics, particularly about elongation ratios and speed of both. I bought some natural amber latex from SimpleShot (along with a band tying jig and a bunch of other stuff). They recommend a 5:1 elongation ratio (draw length to unstretched band length). However, that latex seems really soft and slow at 5:1, and I don't get any real speed until the latex starts resisting any more stretching, which is around 6:1. Is that normal? If so, why does SimpleShot recommend 5:1?
I was previously using pre-made YuXing bands bought from Amazon. They were very stiff and the 5:1 ratio was spot-on, so it surprised me that the natural latex seemed to lack punch until 6:1. I shoot lightweight 10mm clay balls (about 1.2g each), and the YuXing bands were way overpowered, so I trimmed them down to a taper of 1/2"-3/8", and they were just about perfectly matched to my ammo. With the natural latex, I tried the same cut, but didn't feel like I was getting the same speed (even at 6:1). So, I tried a 3/4" straight cut, which is clearly overpowered for my ammo. The Chinese bands feel stiff and snappy, while the natural latex feels soft and smooth, but less powerful.
Is this just my perception, or does the natural latex need more elongation and a wider band to get the same power? Unfortunately, I don't have a chronograph, so I'm going by the way the ball impacts the target.
UPDATE: I may have partially answered my own question. The YuXing bands are 1mm, whereas the SimpleShot latex is 0.76mm (0.030 inches), so even if they're both natural latex, the YuXing bands will be 25% more powerful for a given width. However, that doesn't explain why the YuXing bands start having strong resistance at 5:1, while the SimpleShot latex starts having strong resistance at 6:1. Just a different brand/kind of latex?
I was previously using pre-made YuXing bands bought from Amazon. They were very stiff and the 5:1 ratio was spot-on, so it surprised me that the natural latex seemed to lack punch until 6:1. I shoot lightweight 10mm clay balls (about 1.2g each), and the YuXing bands were way overpowered, so I trimmed them down to a taper of 1/2"-3/8", and they were just about perfectly matched to my ammo. With the natural latex, I tried the same cut, but didn't feel like I was getting the same speed (even at 6:1). So, I tried a 3/4" straight cut, which is clearly overpowered for my ammo. The Chinese bands feel stiff and snappy, while the natural latex feels soft and smooth, but less powerful.
Is this just my perception, or does the natural latex need more elongation and a wider band to get the same power? Unfortunately, I don't have a chronograph, so I'm going by the way the ball impacts the target.
UPDATE: I may have partially answered my own question. The YuXing bands are 1mm, whereas the SimpleShot latex is 0.76mm (0.030 inches), so even if they're both natural latex, the YuXing bands will be 25% more powerful for a given width. However, that doesn't explain why the YuXing bands start having strong resistance at 5:1, while the SimpleShot latex starts having strong resistance at 6:1. Just a different brand/kind of latex?