I do not use .223's as my primary hunting round though I have taken 2 deer with my AR using 62gr Sierra soft points. I prefer something that will undoubtedly drop them like a .308, .30-06, or even .300 Win Mag for longer shot options (depending on where I go hunting).
"Who are the militia? Are they not ourselves. Congress have no power to disarm the militia. Their swords, and every other terrible implement of the soldier, are the birth-right of an American...(T)he unlimited power of the sword is not in the hands of either the federal or state governments, but, where I trust in God it will ever remain, in the hands of the people." (Tench Coxe, Freeman's Journal, 20 Feb 1778)