I was watching an FPS russia segment about his three guns he would have in an apoctolyptic situation, whether zombie, government collapse, etc. He chose a remmington 12 guage, an AK and a .308 bolt action. i have a a 12 gauge and a AR. Im thinking about getting a bolt gun, but it showed a .308 round going through some cinderblock and hitting his target. My question is, is ther any .223 ammo that could also do the same thing? I know the obvious difference is the size of the projectile that a .308 throws is larger than a .223. Just wondering if there is any ballistic tip or anything like that that could do the potential damage, obviously not the same, in a .223 caliber. Also i always get it mixed up, i can shoot a .223 round out of a 5.56 chamber but not a 62gr 5.56 milsurp green tip round out of a .223 bolt gun corrct? Thanks guys much appreciated