Sorry twitch, this is absolute twaddle
it is NOT the volume of rounds fireable, but the weapon as a whole as a (ballistic) system.
If the round doesn’t hit anything, or at least go real close, (crack!.. thump!) IE near enough to keep you still and not firing back, what use is it?
spraying ammunition around may be what we saw the yanks in 'Nam doing, but it ain’t what properly trained and commanded infantry do. BIONot - TV viddie - of the fighting at the old capital Hue was used to emphasise our training - in aimed fire ONLY. Yes, even for 'nam, which was not always jungle fighting, now was it?
Yes, I know all about the ‘Salvo’ research and its points, BUT all armies still train you to AIM, no?
An LMG is used to provide accurate fire support to the squad - bursts of 3-10 rds minimum. An M14 would be all over the shop, as it is a LOT lighter, the recoil force is the same, but the movements will be greater, ask Newton.
If you have fired an m14 on full auto from the hip, did you hit the target, at all, and how far away were you from it?
Now, I have seen very fit and bulgingly muscled instructors fire the M60 on auto - one handed - and hit the 50 meter targets easily. Though heavy the m60 is a straight-line reaction weapon, it doesn’t rise at the muzzle much, which the M14, manifestly, will.
But are you really THAT fit? And if so do you think you’re typical of a US infantryman’s skills and fitness during the m14’s service?
The barrel of an M14 fired regularly on full auto use would wear out in a few days! Apart from ammunition supply versus effectiveness issues, this was the other reason that most armies with ARs in traditional loadings allowing for auto fire usually dropped it in production and modded issue weapons.
A possible reason for the confusion about this - in ‘US Army’ circles - is the long delay in replacing the BAR, which wasn’t within a bull’s roar of an LMG, and the M14 is even further away.
The ‘MG42 post wwII copy’ project failed for poor management review of of the drawings, and another 2 decades later you got the ‘flawed but acceptable’ GPMG-M60, like we did, but when we got the L4A4 Bren back we all were relieved.
Persistence by the USA - in retaining ‘military 30-06’ exterior ballistics, in a shorter case - IMO delayed rational development of infantry weapons in the West. And by a much longer time, if not for Stoner.