Way to go Caddmann. Congrats on your new AR. Let us know if you find any difference in performance between the .223 and 5.56 in your rifle. If it's chambered for 5.56 (99% of ARs are), it will shoot either just fine. Shooting the 55gr FMJ side by side, I can't see any difference except in a slight change of POI. But that happens also, just between different brands of the same type. Which AR did you get?