My understanding at least with the M2 is the rate of fire is at least partially dependent on the reciprocating mass as it is essentially recoil operated, when the barrel and bolt assembly move back about a half inch the barrel extension and bolt unlock and the bolt recoils the rest of the way back. The faster firing M3s have a lighter barrel and I believe the weight of the bolt is reduced as well, that with some spring tweaking results in faster cycling of the action. If anything I would think that a really light barrel like what they put on would result in the thing firing crazy fast.
I like how in all the episodes with browning stuff they don't once mention anything about the head-space or timing of the guns.
Mike
I like how in all the episodes with browning stuff they don't once mention anything about the head-space or timing of the guns.
Mike