I had posted earlier the thread " cast boolits ate my scope". Some helpful posters said to lap the rings being my scope shifted and banged against my rings. Well, I lapped the rings, blue loct tighted all the screws and hand torqued them to the point I could not torque (move)the screws any more. I loaded up some j word 250g sst to factory specs...2200fps and after a half dozen shots and sighting it in the scope started shifting. What am I doing wrong? Are the rings junk? They are warne rings mounted on a ruger american 450 bushmaster with a nikon optic. I think its time to try some other rings.