The last thing I want is an expanding bullet in a MZ. If they are coming out the size of a coke can, they're expanding too much, and won't go through in many situations.My .45 can knock coke can exit holes. It’s all about the shooting the proper bullet. Powebelts are probably one of the worst muzzle loader bullets made in my opinion. Check out Parker BE or fury star tip2 bullets. They absolutely crush deer and are super accurate!