The No.4 Mark I Enfield had it's chamber enlarged to abide muddy conditions. Clear the bore and you're ready to shoot. With a Garand, field strip, clean all and lube and it probably would function.
About the same, with a slight edge to the Enfield as proved in post WWII trials in England with US troops against British.
True, 5 rounds into a firefight no one can hear anything.
Nonsense, the en bloc clip is part of the magazine, the rifle won't function without it in the gun.
David