scope rings slipping
- Thread starter olympia
- Start date
- Location
- Prince Albert, Sk
Rings on bases moving or scope is slipping?
hey guys thanks for the replies, i have not even bought the rings yet. i removed the rear sight housing on my mosin nagant which exposes a 3/8 dovetail and i plan on installing a scope, but internet research leads me to believe the recoil will cause the rings to slip so i am trying to stop a problem i dont have yet. Im just assuming the rings will slip because of the info i have gotten off the internet. im thinking of adding a 3rd scope ring to make it tighter or i was thinking of drilling a hole thru the mounts, tapping the hole and drill a "dimple" on the top of the reciever so i can tighten a set screw to stop slippage. i was hoping someone with mosin xperience can share some wisdom with me
im talking about the rings moving, not the scope. i read on the internet that the rings slide forward from recoil, there is no mount because i removed the whole assembly and now there are male dovetails exposed which are formed right into the top of the receiver. i ordered a 2-7x42 scope and a set of 3/8 scope rings today from westrifle. i also ordered a muzzlebrake and bipod and i cant wait to see how things turn out
Now we are getting somewhere. Rings for a 3/8 inch dovetail are designed to clamp friction tight and are generally designed for lower recoiling rifles, such as the .22 rimfires. In some cases, depending upon the dovetail having the correct dimensions, they will work on high power rifles, but not that well in many cases. The reason is that a lot of these rings are made from Aluminum or a cast metal, and simply can not be tightened up enough to clamp firmly on the dovetail.
Rings for rifles that recoil quite a bit are screwed into a receiver, or are attached by "no-drill" mountings that use the existing sight bases and/or existing holes in the area where they are mounted. For example, the Mauser sights or Number 4 Lee Enfield sights can be easily removed, but when this is done, there are holes in the side of the sight bases where a cross bolt can be put through to firmly keep the base from moving.
If you are worried about it, you could (A) drill and tap as you suggest, (B) add a third ring for more clamping surface area to hold it, (C) add a third ring with a higher bottom on it to the rear of the scope mount and tightly up against the rear of the base to provide a stop, or, (D) buy a proper "No-Drill" scope mount in the first place.
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A well designed 3/8" rail for center fire rifles will have a stop at the front of the rail to prevent the ring bases from moving in that direction under recoil. If yours does not have one a make shift fix could be drilling and tapping a hole for a short 1/4-20 screw to act as a stop.
This is the Swiss Products drill and tap mount just to illustrate the stop.
I'll put a picture of the Clamp-on version later whenever I get home.
This is the Swiss Products drill and tap mount just to illustrate the stop.
I'll put a picture of the Clamp-on version later whenever I get home.
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olympia, I had the same problem with my Parker Hale No.1 in .303. Drove me nuts trying to sight it in before I discovered my problem. It was using the larger Weaver style rings. What I did to stop it from sliding was to mill two slots crossways on the dovetail for the cross screws to set in. Problem solved.
