You're not the only one with that problem. I've had teammates tell me the guy is hit because I just can't hear him. Since the MK46s came out what are we supposed to do with RS/AS simulation conversations? The 7.62 would out perform the 5.56. What about PKMs when they do? They use the 7.62R the SVD Draganov sniper round. This is why I think airsoft rules and limits should be based on performance before appearance. They would be a more universal. Funny that you mention that SAWs should have stock barrels, I have a 6.01mm in mine.
I guess I'm just cheesy.
mateba