A shot with quality self defense ammo, or hell, even FMJ to th pelvic region is a pretty darn good fight stopper.
Some "old hands" passed that down to us in the big sandbox as a way of stopping a bad guy clean, keeping him around to interogate, and minimizing potential for over penetration. Good deal all around.
NRA Life Member
Me: "The .45 GAP was an answer to the question nobody asked."
Trooper pal: "Says the guy who thinks .38 Super and 10mm are viable pistol calibers and gets mad when Wal-Mart doesn't have them."