<snip good stuff> (Assuming of course they had enough fire discipline to not just start blazing away as soon as they saw a target.)
I rather had the opinion, based on what Vietnam Vets related, (back when the war was on,) when they returned was that all too often everybody either fired, post mines/booby traps, very short range (ambush/counter-ambush) "effectively enough" or sprayed "suppressive fire" and tried to not become a casualty. Doing both at the same time might have been likely in many cases. Exceptions were when a buddy went down and someone brave enough to recover him needed cover fire. While not exactly "aimed" like on a target range people tried to point weapons at known enemy positions to allow the recovering person to get in and out successfully.
Back in my day gang fights seldom involved fire arms beyond revolvers (and rare then) and (Thank God) I was never under fire while in the military so I can't speak first hand about behavior in combat (I really don't think 1960's gang fights had the same level of firepower involved as a 'force multiplier' back in those days.)
Fire discipline seems hard to maintain in combat - seeing the wonders of biathlon shooting in the rare winter olympic coverage tells me that the physics of exertion and shooting accuracy is possible but very difficult even without be shot back at.
Any way this has been avery interesting thread. Many thanks to all who contributed. Thinking about the line between game and simulation was good. Play what pleases you seems the best summation.
Gracias,
Glenn