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But piercing armor is not the end-all and be-all of combat bullet effectiveness. Bear in mind that when our forces invaded Iraq, our primary battle bullet was the 5.56 62gr greentip armor piercing bullet. Our troops found out quickly that against unarmored personnel, these bullets were not ideally effective, basically just pencilling through the target's body and causing much less damage than the old 55 gr bullets we'd been using since Viet Nam.
And those 62 gr bullets were going a lot faster out of m16's, than any 5.7-launched bullets...
But I do wish folks would quit saying the 5.7 is a challenge to reload, 'cause they're getting me intrigued, and I had really planned to go buy other stuff
If I did buy one, though it would probably be an AR57 upper for an AR15
