This may be a little late, but I just had a gunsmith install a scope for me on a NIB Remington 700. I mounted the scope myself and used loctite and gorilla-tightened the screws. Everything looked fine until I tried to turn the variable power adjustment and it wouldn't budge unless I used a channel-loc! I loosened the rear ring screws and the power ring moved okay but the ring was too loose so I figured I needed shims.
Long story short, I ended up having a professional install it. The alignment was very slightly off so he lapped the rings and took off all of the loctite on the ring screws. He hates loctite and says its not necessary, in fact it creates more problems in his opinion. Anyway, after lapping he remounted the scope and just made the rings finger-tip tight with the torx driver. I then tried to twist or move the scope and it wouldn't budge at all! Wouldn't have believed it if I didn't see it myself. Lapping the rings creates much more surface bearing area for the rings and really locks the scope in place. Another advantage is that if the rings are lapped they won't leave rub marks on the scope body. He's probably mounted hundreds of scopes and hasn't had any problems.
He matched the ring halves, lined up the reticle and bore sighted it. The crosshairs were only an inch or so off center. I'll be zeroing it next week (hopefully!). Had I shot the rifle without fixing the scope problem (I was tempted!) I probably would have ruined a good Leupold.
I guess if you are going to be mounting a lot of scopes, the alignment jigs, lapping device and bore sighter will pay for itself soon enough. Me? I'll have my gunsmith mount my scopes from now on--some things are worth the money, in my opinion.