Scope slippage

[CASEC]

Just got my M 48a out shooting today. I bought it set up like it is. It has an S&K scout mount and a lei pork er 2.5x. Well I was shooting some pretty hot Turk surplus and I can see where the scope slipped up in the rings under recoil. My questions are: how do I remount it correctly. .& How do I keep this from happening in the future? It shot really well otherwise.

[Merc1138]

Assuming the rings aren't crap and actually have a decent amount of surface area to grip the tube, there's something lacking in your post and that is whether or not you actually torqued it down properly.

[osis32]

Properly torque it and use blue loctite. Although if you properly torque it you shouldn't need loctite.

[ElvenSoul]

Did you lap the rings?

[E92335i]

lap the rings or buy quality rings like Badger or TPS etc. I use blue loctite on my rings.

[JMP]

You probably didn't screw it tight enough. You don't need a torque wrench to mount a scope. The range is wide enough where common sense prevails. You'd want to tighten it enough so it doesn't move, but you would not tightening it enough to strip the screws or damage the tube. If you use a torque wrench, it should be in the ball park of 2.5 newton meters, but read the instructions for the manufacturer's recommendation.

[Spyder]

It has...a lei pork er 2.5x.

['ol shooter]

Go to a Sporting Goods store and buy a rosin bag. Clean insides of rings and scope with alcohol and coat inner rings with rosin from the bag. Remount scope, torque rings to 16 inch lb. with some pink or blue Loctite on the threads, so they don't shake loose.

[dskit]

Go to a Sporting Goods store and buy a rosin bag. Clean insides of rings and scope with alcohol and coat inner rings with rosin from the bag. Remount scope, torque rings to 16 inch lb. with some pink or blue Loctite on the threads, so they don't shake loose.

Along these lines, make sure to clean out the inside of the rings with some type of solvent - new rings often have some oil on them for rust prevention - they need to be dry to have a good grip on the scope.

[Caseless]

Assuming the rings aren't crap and actually have a decent amount of surface area to grip the tube, there's something lacking in your post and that is whether or not you actually torqued it down properly.

This.
And hear the locking click twice on each screw, then it's all good.

[dfletcher]

Go to a Sporting Goods store and buy a rosin bag. Clean insides of rings and scope with alcohol and coat inner rings with rosin from the bag. Remount scope, torque rings to 16 inch lb. with some pink or blue Loctite on the threads, so they don't shake loose.

I bought the rosin from Brownell, it keeps a pistol scope in place on my 15" Encore in 375 H & H. It can crud up the scope tube, produce a little "shadow" where the rings clamp down. Worth it though to keep everything in place.

[kendog4570]

For you guys using rosin, try making a thin slurry with denatured alcohol with it. Brush it on and let the alcohol evaporate. Much thinner and better coverage that trying to get it to stick where you want it when dry. Wipe up excess with alcohol soaked patch.
I keep a little painters touch-up bottle with a brush in the cap filled with it at the bench.
K

[LynnJr]

Lap the rings over-sized and bed the scope using JB-Weld.
This will assure you of 100% surface contact without putting stress on the scopes main tube.

Simple lapping of the rings means the rings are true but very few scope tubes actually are. You can test this out for yourself by placing any scope in vee-blocks and observing the run-out on an indicator.

The majority of scopes put into lapped rings are all bound up and stressed because the tube isn't as straight as the rings are. Bedding cures those problems.

[ElvenSoul]

Or just use Zee Rings

[Wrangler John]

Or just use Zee Rings

^^^ This is the answer. Whenever possible I use these rings. The plastic bushings retain the scope, they self align with any minor misalignment keeping stress off the scope tube, and can be replaced with offset bushings to rough zero a scope where the bases are not properly aligned due to poorly aligned receiver mounting holes.

Mounting a scope requires a torque wrench or gauge for best results, as do action screws. I use a precision torque gauge, but a torque wrench will do fine. Good ones cost $100 to $200 or more.

Clean all the parts with acetone or other solvent, especially the screws and threaded holes, then use a toothpick to apply a miniscule amount of oil to the threads and torque to the proper setting. The scope will not slip thereafter.