[Luke]

What are the booster hole opening for the Mg42 for 762X51 and 8mm? I know they increased and decreased the size which affected the cyclic speed firing rate on the 8mm. I think it was 10mm for .308 and 11mm for 8mm? Thanks

 

[Seastee]

It varies, I've had some 13.5mm boosters on German kits and 10mm boosters on m53 kits. Early war ones had a faster rof for the 8mm mgs, after the war and the mg1-3 were implemented and the booster and bushing were changed to 308 the diameter dropped down quite a bit. If you really want to rip fast you can run 8mm through a mg3 booster... almost too fast tbh, makes the gun start eating yourself. This is a 8mm with a 13.5 booster.