OK just remember this when everyone is going on about velocity + mass >>> energy = some number and so on....
A 9mm MIGHT EXPAND,
A .45 WILL NOT SHRINK.
Think Glock 21.
.45's usually don't expand jhp's, due to too low a velocity. The 90 gr CorBo9mm jhp DOES expand, viciously so, In a 4" or longer barrel, it has1500 fps, and 450 ftlbs, yet its recoil is very mild. The .45 ball rd usually won't even stop a housecat with a chest hit. It's just had a lot of bs war stories told about it, that's all.