If it is an exit hole you want.. switch to the copper plated Aero Tips. From all I have read, they penetrate better. As for lots of meat damaged from the lead hollow core powerbelts, it sounds like they did just what they are intended to do.. extensive internal damage. The copper plated hollow points might help with the internal damage a little but I would not expect much.

Were you having knock down power with the powerbelts or perhaps they ran off and left no blood trail. If that is the case then as Sabotloader said, switch to something else. Those shockwaves should do real good in that deparment..