i'm really thinking this rifle is 762x39.. however it's so darn hard to play with with the mag beig f-ed up.
i've considered taking a 762x39 NEW brass cartridge from walmart, pullingthe bullet and maybee putting a wax plug in and manually loading that one into the chamber and then firing it.
if it is larger than the x39, it would fireform and the bras should show that...
but the 'safe' person in me hasn't signed off on that expirement yet.. especially with somebody else's rifle..
