Ok,,, Ya clean all mating surfaces. Then Ya "Locktite Em Down",,,,,,,,,, wait 24 hours or whatever. Lookin good!! Between the rail/mount/scope,,, with differant metals,, those "Loctited" screws are bound to not move!! Yee Haa!! Thats a 3 point problem Folks. I respectfully disagree with "Locktighting" down scope mount screws. You will get movement between the base & mount,, there goes any "snugging up". If nothing else,, temp changes will contribute to this. Oh,, lets "Loctite" our stock screws to the action,,, an even bigger mistake,, (Not only my opinion),,,, lets see,,, screws WONT come loose,,, But,, constant vibrations will wear on the base of these screws resulting in,,, just like loose screws,,,,, unwanted vibration!! May I suggest,, wrapping screws with teflon tape,,, keeps em snug,,, dampens vibration,, & adjustability is always an option. I know,,, there are many options regarding stock screws (A very common demon against accuracy). Im just saying,,,, teflon tape is very much overlooked as a simple cure for ALOT of the problems airgunners encounter. Think about it. "Old Tim" (Preparing for an a$$ Whoopin)!!

OK - I put a drop on the screw and tighten it. Some time later it dries and, hopefully, stays put and accuracy is good. Much later I need a new spring or seal or just want to do some maintenance. How do I get the screws out? I know that on some Loctite you can use acetone to dissolve it. Let's see, isn't acetone a main ingredient in most furniture strippers? I think it's recommended for removing varnishes. So, how do you get the screws out with marring the finish? And what if they don't budge? Going to be mighty hard to remove them or drill them out without damaging the wood.

Scope screws are one thing. Loctite has been used there by a lot of guys. Stock screws, though, are another. Especially on air guns as it has been noted here that you can tune for accuracy by varying the stock screw tension. Teflon tape is good in this respect.

I also saw a blurb on one of the major blogs about how changes in stock screw tightness actually affected fps. The more tightly they were torqued, the lower the fps. Too much of a good thing?

....how over tightening stock screws can affect fps...I had experienced this with one of my cheaper airguns...once I loosened the screws..the gun got back to normal....

With medium loctite, screws will always be screwable if necessary.
For the scopemount rings and mount screws loctite is never necessary imo.
Just use a lockpin if yr action has holes or use a stopblock if it doesn't. Solved.
A scope will never come creeping backwards if its mounted correctly in the mount.

The thing that keeps fasteners (cap screws and bolts) tight is the stretch of the fastener. NOT the tightness. In racing and aircraft engine building, you always measure the stretch of the connecting rod bolt with a dial indicator.
If you use a lubricant like moly on the scope mount screw threads and tighten it properly, you will get a better hold. If you use LocTite and don't stretch the cap screw enough, the mount will move.
Rob

http://www.pyramydair.com/blog/

I'm thinking that Hector's recommendation of tuning the screws is adjusting the fps, thereby optimum power plant efficiency.

The blog link should take you to his discussion of a Diana 27, Part 7. Read down a ways and you will see where he was doing before/after fps with a seal change, then realized his screws were loose.

but true...thanks for the information ...these airguns do raise questions...

Just use the blue medium strength Loctite it will loosen with a wrench and can be cleaned up and reapplied.

FWIW - when I mounted my BSA 3-12x and later my Hawke 8-32x on my RWS 52, no loctite was involved. I also did not bother to clean things. I put the Beeman one-piece adjustable mount on and mounted the scope. Nothing has moved in a year.

I have to agree with Ray, I have about eight scopes mounted, never have I used Locktite on any of my screws, and they haven't moved, one thing I do very well is degrease all my contact points and that includes the scope rail. I do not crank down on any of the screws to cause damage at all to the scope tubes. The scopes do not have a scratch on them.

Rubber cement. Been used for years and on heavy real magnum rifles, too. As to where you can still find it, well, that's another thing.

even if i used an impact driver the transmission case screws would vibrate loose. the solution was to put a dab of 3m weatherstripping cement (yellow)
on the head of the screw so it slopped over onto the case surface. just a small dab. they never came loose after that and i could undo them with the impact driver. of course, no need to use an impact driver on our screws.

the 3m never touches the threads by the way.

on stock screws there is always an initial compression of the wood. quite a bit when the gun is new. if you locktite the screws the wood will still compress and the screws will be loose but will FEEL tight. once the rifle has settled in the wood will compress less. you will still need to check them before you use the gun but it won't take much tightening.

the 3m trick would work on the scope mounting screws although it does not look pretty.

You said it way better than I did!! The wood will compress & "wallow out" to some extent,,, if you use locktite the screws will still seem tight when indeed they are not.(Tight to the stock that is). The nice thing about using teflon tape is,, it keeps the screws from vibrating loose,, but also allows easy tightening/tuning/removal!! And to the other guy that responded about scope mount screws (lubing them with moly) I aplaud you Sir!! (Im sorry I cant remember your name)If it is good enough for aircraft,,,, well,, enough said!! To be honest,, I have not tried teflon tape on my mount screws,,,,YET!! But,, I will now admit,,while others have advocated the use of locktite on scope mount screws,, I have been for MANY years using a very small amount of grease on ALL my scope mount screws,, with great results. I feel like I can tighten the base screws more this way without fear of stripping them. (I have stripped a few Un like locktight,, this also allows you to keep an eye on your mount & snug up these screws as the differant metals "work" (Aluminum/steel),,,trust me,, with the temp differances alot of our guns are exposed to,, there is going to be some movement between the 2 differant "metals". I have mounted scopes on MANY airguns,,I even was able to get an inexpensive mount to stay put on my 54. I know what works for me. Dont try this at home!!LOL!! "Old Tim".

If you want to loctite scope screws, just use the green stuff. You apply it after tightening, and it creeps in to hold things in place.

No big deal one way or the other. Use the right color for the right service. Usually that would mean Blue or Green for air gun size bolts. And just a small drop on the threads, not fully covering the full length. If you have to later adjust these locktited screws at a later date; no worries, you can do that a couple of times before you need to remove and redo.