I have a 209x50 which I mounted a leupold QR base and ring system onto. It was shooting 14 inches low at 25 yards, in a nice group. My scope did not have enough adjustment to bring it up to center. I thought the problem was with the mount, so I returned it. I bought the weaver T/C mount and the gun is still 14 inches low at 25 yards. I'm sure now that two sets of different mounts are not bad. I will shim so I can hunt for now, but after the season, should I stay with the shims, or explore the problem further. I'm pretty sure it has to be the barrel, unless a different explanation can be found. I am using a different scope now also, so it is not the scope, either. Has anyone else had this problem. I'm thinking of calling T/C to see if there has been a problem and returning the barrel to them. :?