Originally Posted by Beware Owner
Up to what size deer would you take with a 5.56?
5.56 will cleanly take caribou with a good heart/lung shot, even penetrating both shoulders, or a shoulder and spine.
It will certainly take any size, or breed of deer you're likely to encounter, so long as you place the round in the vitals.
I'd pick a heavy load like the 62-70 grain TSX and run with it.