Wow, I gotta admit I wrote this thread off because I thought it was sure to be a lot of Fudds poo-pooing the 223 as a big game round (which a lot of it is). BUT....Read it all from page 1 and learned a lot. I never had doubt that the 223 could kill big game, but I have been pretty impressed with some of the pics on here showing just how effective it can be. Probably the most surprising thing to me is that the 62 or 70 grain Barnes isn't the bullet of choice. Posts on here are probably 50/50 on great vs poor performance, maybe a few better on the great side. That 77 TMK seems to be a real death ray though. Seems that for this round, a fragmenting bullet is better than monolithic. For me though, I just can't shoot an animal with a fragmenting lead bullet. Meat loss is just too great. That's why I've been a Barnes guy for years. The AR I am currently building will definitely see some big game use, but first I am going to have to do some bullet testing. Really interested in how the hammer bullets perform since they frag, but in much larger pieces.