I just relayed what I had heard from a soldier I had the pleasure of talking to. He said they were running through 5.56 rounds as well. He shot a couple in Faluja with his side arm and they didn't even blink. I trust him more than anyone on here. He was actually in a war and saw a lot of action and had battle scars to prove it. I am just relaying real data I received from a real creditable source.