My 209x50 has a weaver mount and rings with a 50mm scope. That seems to be holding up fine. My 338 Win mag barrel started out with Redfield mounts and rings with a 50mm scope. It kept tearing loose. I went to a 40mm scope and lower rings, still came loose. I finally went to a Virgin Valley mount with six screws. Had to get 2 extra holes tapped in the bbl. I used Warne rings with the new mount. No problems at all. One of the main reasons, that I went to the VV mount, was to get my rings farther apart. All of the Burris, Leupold, Redfield, etc. mounts use the factory holes and put the rings too close together IMO.