I have 2 RUM's that have never came loose but my 450BM is being a pain.I thought it was the warne rings so I bought leupolds and had a smith professionaly install them with rosin. The optic shifted back wards after about 12 rounds. I checked my action screws and scope mount and rings. All seemed extremely tight. Kept shooting and it moved some more. I used tge same load today. 300 grain lee with the average muzzel velocity around 2, 075fps. So I'm not over killing my rifle as far as I'm concerned. So, rosin didn't work...what's my next step? Do I dare glue my optic to my rings? I'm getting overly frustrated abd running out of ideas.