.223 is designed to kill. round breaks up creating multiple woind channels. so a non lethal shot can be lethal. you breath heavy with taliban shooting rpgs at you. can you use it for deer hunting sure, would I? nope, if you want a ar platform get it in 22 250 or 308. if you want a lighter gun with a cheaper round go 30 30. if you want a deer rifle get a 270 or 7 mm. nice flat with plenty of knock down power
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