i have a .223 chamber for my ar-15. i have been told it would be a little risky to shoot 5.56 out of a .223 chamber due to the fact 5.56 is of a higher pressure load vs. the .223 load. that being said has anyone hunted with 5.56 and has anyone shot .223 out of a 5.56 chamber? if you have can you tell me if you noticed any accuracy differences say out to 200 m. i may buy a 5.56 upper but am not sure about it if it will throw my groups to hell at 200m. i currently shot blackhills 60 gr V-MAX blue box and love them. can't post this on AR-15.com cause they don't accept hotmail adresses. hope someone here knows what i'm talking about
