I had a Rossi .243 with the same problem, life is short so I just sold it after fighting with it for a couple of months. Lots of the H&R's also have this problem, so I think it is just how things work with break open rifles. How they lock up means everything to how accurate they are, People say to try shooting it without the forearm on to see if it has somethig to do with the forearm pressure, but I would not hold my breath thinking this is a fix. Go read the faq's on the H&R board, everything that applies to them will apply to yours. Good luck. Larry