The problem is a lot of guns still have an open face bolt, which allows roll back in the breech. This causes stack clipping, especially with more brittle paint that can't bounce away from bolt impacts, but rather cracks.
What you need to do:
Raise your dwell up to 21ms. This will allow you to run your LPR lower than usual. Less energy behind the bolt means less chance of cracking a ball in the stack. This also allows you to use less pressure when shooting a bal.
Set the ball tension on your hopper lower. This will give balls in the stack the ability to bounce upward and absorb energy from the bolt impact, rather than just cracking. If they're being pushed down hard, they have nowhere to go.
Raise your eye sensitivity/delay depending on your board. This gives paint more time to settle in the breech before the gun is fired. Never a bad thing when shooting brittle paint. it also slows the cycle of the gun down a bit which helps to run a lower LPR setting as well.
Run a larger bore barrel. When paintballs are fired they deform and flex. The more room they have to flex, the less chance there is of a ball breaking.
When possible, keep your paint warm. Warm paint is more flexible. If you can't keep it warm, open up the bags and dump it in a box to absorb some moisture. This will also soften up the shell. Just keep squeezing balls(LOL) until they soften up slightly. Wrap them back up at this point. If you leave them too long they'll get too flexible and bounce.
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