I'm sorry, and I really mean no offense to anyone, but this string demonstrates what I think is the questionable turn that most of these discussions take. We begin by talking about the effectiveness of the .223 softpoint in a survival or shtf scenario (not a military assault) and very quickly it devolves into the hypothetical realm of talking about its suitablility for shooting through trucks, cars and body armor. I don't realistically believe that in any survival or shft situation I'm gonna be in a firefight with a car full of guys driving forward in it to attack me. I'm sorry, but I simply do not. (I'm also trying to picture in my head what would happen if a car full of assailants were suddenly subjected to a 20 round magazine of .223 softpoint. I think I know the answer.)
Moreover, the body armor concern also confuses me. I do not honestly think that in a survival or shtf situation, someone wearing body armor is going to feel so safe and snug in it that he is going to willingly face fire from .223 softpoints to get what he wants? One hit on an assailant's arm, and I believe his arm would be practically torn off. The same would be true of any other appendage.
Were I to be assigned to a roadblock in Iraq, then yes, I would worry about shooting through cars and shooting through body armor of suicide attackers. But here, I believe it would simply be irrelevant.
Just some thoughts.
Mannyrock