Quote Originally Posted by tinbum View Post
Or increase TP? I assume you've factored this and worked it out, but does the SCR requirement change as diameter/volume/pressure changes?
nah - all these 22s are perfectly tuned in terms of power output with different pellet weights either side of it's preference - say JSB 7.3s, 7.9s 8.4
So it;s not that kind of bouncing problem (easily sorted with piston weights, larger TPs etc). Exactly the same in that regard to the 25s (although obviously the actual specs will be different to achieve it).

BUT it looks like this "balanced" setup gives more piston bounce in 22s than it does in 25s. Maybe we should tune them for more "slam" ? The 22s are very tricky, as they are so easy to over spring (see above).