Tested some MKVII brass case ammo in my MKII semi conversion.

All rounds fire but will not cycle the gun. Tried a 2nd MKIII Bren and it also will not cycle,
1942 manufacture date so not sure if it lost some of its "pop" from age or just not Bren friendly.


As an FYI the brass is boxer primed but the primer size is about .005" smaller than USA large rifle primers. I opened up the pockets to reload the brass and my MKII ran without issue on gas setting #4/ My gun has the early double row of holes gas cylinder.

AMMO~






Good stuff !