Which perfomance metric needs to be improved? Terminal Ballistics or External Ballistics?
I know a fellow local here that simply cuts the tips off the bullets... the results are bigger wound channels. That's one simple way. Dremmel with a cutoff wheel. He cuts off about a 3/16ths off the front, then cuts an X. Done. I've never given it much thought and I've not tried it... but I've seen the results and they are gruesome.