Doc, Not staying with the gun when the gun is on the move, is one of the most visible indicators of poor gunfit. If the gun fits properly and if you are not armshooting, it will be lined up at the end of the move. Your cast question cannot be answered fully without a good fitting analysis to see the wheres and whys of this problem. Just off the cuff, it sounds like a comb adjustment issue instead if a buttplate issue. Your buttplate insures comfort and solves drop at heel/toe out issues, and compensate for neck length. I wouldnt try to solve my alignment issues by cranking the plate. I would scoot the adjustable comb over a little to the right. If you do not have an adjustable comb, there are several of us who frequent this site that can take care of you in that regard. Yours in Shooting and Merry Christmas. Todd Nelson 256-762-6559cell