Hi all,

Just to give you all an update. Have the gas regulate and barrel hole drill per Joe information on both 7.62x54r and .303 barrels, and replace the recoil spring to the double mk2 spring with some good progress.
Barrel hole - .196"
Gas vlock exit - .196"
Gas regulator #3 - .1695"
#4 - .185"
the 7.62X54r have no problem extract the empty case at #3 setting (.1695") while the .303 still having problem to extract empty case at the largest setting (.185"), thought the bolt and carrier move all the way back but still not enough to extract empty case. How large of the barrel hole can I drill for the .303 barrel? have any one use bren mag for 7.62x54r? if so what modification that I need to do to the mag? I have problem with the ZB39 mag only load one or two rounds to the chamber then the bullet tipped down (up) to the mag.

Loc Chau