lemoyne.. I think you can push them as hard as you want. Whether they will fragment I could not tell you. I saw a picture of a moose shoulder with a hold blown clear through it from a 250 grain shockwave. So it was fired with three 50 grain pellets and did not fragment. If fragmentation is a real concern, you might want to look into the bonded Shockwave bullets. They are supposed to shoot the same as the other Shockwaves and hold together better...

Good luck hog hunting. It sounds like a lot of fun.