I've used both NP and Accubunds on deer sized game. Probably 15 or more different animals. I actually don't see a heck of a lot of difference in killing power, though accubonds are somewhat more accurate. Having said that.......I'm going to use heavy for caliber ballistic tips on deer sized game, accubonds when my BT supply runs out and partitions on big stuff like elk, moose, bears, etc.