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Posted: 4/30/2010 8:30:11 AM EDT
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Hey guys (and gals),
I have a Marlin Model 70 with a 3/8" railed receiver. I took it out this week and shot 200 rounds. I noticed during my session that my scope wouldn't hold a zero. I checked the scope and noticed two things - the scope was moving in the rings (easy fix), and the scope rings themselves were moving back on the rail. I tightened both and kept shooting. I noticed again that the rings were sliding back on the rail after about 50 rounds. Other than drilling and tapping the receiver for a new rail, does anyone have any other ideas? Is there such a thing as "quality" rimfire rings? Thanks. |
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Some of the 3/8" rimfire rings I've seen have a vertical stake screw that firmly fixes the position of the rings on the receiver rail. You might try and find some of those.
Midway also sells adapters that screw on to your 3/8" receiver grove that will allow you then to use any standard "Weaver Style" rings. They are said to grip the rail very firmly. You might also use some blue locktight when you mount your rings so they don't vibrate loose. 
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| I've had this same problem once. The problem was caused by me tightening the top screw before tightening down the bottom screw. If you clamp down the bottom screw first, it gives you a better bite on the rail. Then, tighten the top screw to ensure the scope is tightly clamped into your rings. By tightening the top screws first, it spreads open the feet that are supposed to lock agaisnt the rail. Hope this makes sense. |
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