Its either overbore for the bullets you are using or the barrel has a lot of stress. If you feel it is the proper bore size, stock/scope screws are in place properly torqued, scope is good, then you could try a set of LEE Pacesetter dies (the cheapest usually yet good dies) if you feel your dies are OK, try some Sierra bullets instead of the Privi. If you don't want to go to the expense of a new barrel, then the next best thing is to send the barreled action off and have it Cryogenically treated. It will take out any bad stress. Usually under $200, but shop around. Midway USA used to sell Mauser Adams & Bennett short chambered barrels for around $90 bucks! You may find a good "take off" barrel on Ebay, etc too. Its just how much you want to mess with this thing. "Myself", it would get traded off or sold cheap, ha. Good luck to you though, sorry you got a Lemon.
