For 20 years I have used a film of clear GE silicone seal, applied with the index finger, between in the rings. The scope will absolutely not slip, even with minimum torque on the ring screws. after tightening the ring screws, and the silicone seal dries for a few minutes, you can clean any off the scope and edge of the rings with a rag without any residue remaining, it just rolls right off. When you remove the scope, you can remove the silicone seal from rings and scope with your finger. It minimizes any scratching of the scope tube due to misaligned rings. before using silicone seal, I used powdered rosin, but it is far too messy. That powder gets every where.Try silicone seal and you won't ever use anything else. RJ

Last edited by rj308; 01/19/18.