The Rifle will shoot. You may have to coax it along a bit to get it to shoot as you wish.

I dont think I saw how many shots you have through this barrel. If its less than 100, I might try shooting it a bit more to see if it "shoots itself in."

Some barrels just like certain bullets, you might try a few different bullet/powder combinations to see how they work together. The powder you mentioned is not one I am familiar with, so I can not comment on it.

Something you may try is tubbs final finish. These may clean the rough edges off the barrrel enough for it to shoot a bit better.

Another thing to try is to torque the action screws to different torque levels and see what that does. You may also want to bed the action.

Last thing to try is a barrel replacement. You can get a replacement barrel for that relatively cheap. I think there is a 7.62mm barrel group buy going on right now...

You can get that thing to shoot, it may just require a bit of effort on your part.

Sean