Hey guy's I'm relaying a question from a friend of mine. He wants to buy 1,000 rounds for his AR, there are two options for ammo, one is 62gr .223 Penetrator, the other is 62 gr 5.56 Penetrator. They're both the same price @ $305.00. I know that .223 would be a bit more accurate, not sure if it's a huge difference or not. His upper is capable of shooting 5.56. So I'm just wondering what you guys would do in that situation.. I'm just not too terribly knowledgeable on the pro's and con's of each round to give him an informed decision. Anyways, I would greatly appreciate any input you guys have.