Keith:
Getting a little more realistic, the rate of fire can be under 500rpm. The MG-42 was a sustained base-of fire weapon, not an assault rifle. By way of comparrison, it's about the most accurate full-auto weapon out there being capable of firing decent 'groups' on full-auto. The barrel and gas mechanism heats up quickly on this gun because of the rate of fire, not because of controlability.
And I doubt that the current doctrine is the correct or best doctrine. If every infantryman were to have an M-249, the squad would be much more effective, much less mobile, correct? Full-auto has its place in the M-16 now, but this is limited to ambushes, suppressive fire, and they like. The reason? The M-16 isn't controllable enough in full auto to reliably engage point targets. If an infantryman can be assured of a hit on a point target at 300 yards with full-auto, he'd better darned well be shooting full-auto. Semi-auto engagement would require several aimed shots. Why not use the first few rounds to get in a rhythm and then walk the rounds onto the target like an machinegunner does? Sure, we can't expect the assault rifle to take the place of a machinegun, but we can expect it to perform short-burst engagements of, say, 10-15 rounds at a time. An effective ballanced recoil weapon will allow him to engage whereas he'd need a SAW under current doctrine to accomplish the same task.
There is a paradigm shift that must occur. Conventional wisdom would tell us that the infantryman will be overburdoned by ammo and it's wasteful to shoot full-auto. I've heard this before. It delayed adoption of the rifle repeating rifle, of the semi-automatic rifle, of the M-16, of the 30 round magazine for the M-16. At every step of the way, nay-sayers were complaining that conservation of ammo was important. In the end, they were right when it came to spray-and-pray tactics used with the AK-47 and M-16. The Germans, however, utilized a squad concept where the light machinegun (MG-34 and later MG-42) formed the backbone of a squad with the other infantry there to carry ammo and support the LMG. Their effectiveness casued a switch in thinking where firepower was thought to be the answer. I'd argue that it's not firepower alone, but concentrated, accurate bursts. Later in the war, the Assault Rifle was born of the desire to make every infantry soldier a Machinegunner. Their FIRST EFFORT was a ballanced recoil weapon. In fact, the reputation it got for controllability was as much due to it's constant recoil bolt-carrier as it was due to the weight of the rifle.
Thinking in modern Western and Eastern tactical terms limits us to the weapons we have today. We can, however, restructure the infantry to be more effective. My vision is that roughly two out of every three soldiers carry an assault rifle. The third should be a Grenadier (equiped with a grenade launcher or launching attachment), a Machinegunner, or a designated marksman. My optimum squad would be six riflemen (with ballanced-recoil guns of course
), two grenadiers, one machinegunner, one designated marksman, and a squad leader who also carries a Balanced assault rifle. All of the weapons can be versions of the same gun. Yeah, Gene Stoner thought the same thing and look where it got him! Use a heavy barrel for the LMG and Marksman rifles and just strap a launcher to the Grenadier's standard rifle. All guns fire the same ammo from the same gun and magazines interchange. What a concept.
There is no logistical reason why we cannot do this. The Russians even have a similar squad concept with light automatic rifles taking the same magazines and essentially a heavier AK design.
One final note: You say battle rifles are not meant to be bullet hoses. Why not? If we can do it logistically, and heck, the Nazi's did, then what is keeping us from doing it?