The fix for slippery scopes is a product made by 3M called Scotchcote. This product was made for the electrical industry. A good hardware stoe should stock it. Apply this to the inside of the rings, avoiding the screw holes at the flat. Attach the scope as normal and remove the excess Scotchcote. Make sure the scope is in the position you want it because this stuff sets up fast. Let this cure overnight and go to work.
The scope can be removed, you haven't superglued it in place, but it will not slip. This works on the heavy rifles and air guns, which really beat the tar out of a scope.
I moved this thread, as it applies across a wide spectrum of applications in regard to optical sights. It was moved here to the gunsmithing forum so that it doesn't get lost among the handgun cartridge information!
This product is a primeval goo that comes in a can. As I said it was designed for the electrical industry, I assume to work as a wire coating in extreme situations. A small amount applied to the rings gives a nice "fit" and once it hardens that scope is going nowhere until you tell it to. Another of many tips from my hero Ross Seyfried.
In most cases the adhesive tape will work just fine, but on the heavy caliber rifles and just about any handgun, this would be my choice.
I've been preaching the virtues of ScotchKote for years. It is the easiest to appy, 1 drop to one half of the rings, and works better than anything I've tried, tape, rosin, lapping...you name it. From .309 JDJ to .50 Alaskan handguns, and from .22 LR to .458 and .416 Rigby, this stuff won't let your scope slip. To remove scope, just pull up on the scope and clean up with acetone.
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