I found this account interesting . . . and some of the stories to be unbelievable (I'm not doubting, just stating that I would've never imagined these results before reading this). I'm not advocating for one round or defending another--just passing on info. Combat Medic's Advice: "Shoot the heaviest rifle round...shoot at what (you) can hit, and then shoot it again" - The Truth About Guns
I've heard a number of people speak from experience that softpoint .223/5,56 rounds work very well. GDHP and BBC as well as TSX copper seem to be the way to go if you really want to stop something with your AR.
Interresting indeed. I advocate no rounds coming towards me and strongly advocate any round in my clip.