I think I know the 5 most important things about any encounter with a BG are placement, placement, expansion, placement and expansion. That is assuming you use a caliber you can shoot well and practice, practice, practice. What I am wondering if muzzle energy is something I should consider assuming I use a round that meets or exceeds the FBI protocol. My thinking is that if I were in a fistfight with Mike Tyson, a blow to my head may well kill me. However, if he tapped me on the shoulder I'd be OK for a short while before I cried like a baby. If he really hit me on the shoulder, it may not kill me but it sure would make it hard for me to keep going in the short term. Is this analogous to muzzle energy. IF I ever had to draw, I'm interested in having my non-CNS hits be more like a punch, not a tap from Tyson. For example only, the muzzle energy for a 165 grain .40 round is greater than a 185 grain round. If I were to miss the CNS and hit someone with a 165 grain round, would that have more "punch" at the receiving end or are there just too many variables to make this a consideration. I am normally a fan of the heaviest round for a caliber but this has me possibly rethinking things if ME is a factor Wanna kill these ads? We can help!