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Rifles, Reloading, Optics, Equipment
Gunsmithing
first time lapping rings
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<blockquote data-quote="azsugarbear" data-source="post: 2157109" data-attributes="member: 4809"><p>Years ago, I decided to lap a set of rings - mostly out of curiosity. The result was surprising. I expected some light, even wear over the entire surface. What I got was pronounced wear in one or two places. Having been turned on a lathe, the steel bar used in the process was perfectly concentric - which left only the rings as being 'out-of-round'. I was amazed and shocked at how only a small part of the ring was actually in contact with the body of the scope. I would estimate less than 15% of the ring is making contact with the tube. This is true of both inexpensive and high-end rings.</p><p></p><p>Now 15% contact is probably enough to hold a scope, even with high recoil. But when I am spending thousands on a rifle, I want to eliminate any possible weaknesses that could negatively effect accuracy. The cost in time and money to lap rings is worth it to me for my own peace of mind. Like some have indicated, you can take too much off. I usually lap until I can see 30%-35% bare steel or aluminum on the bottom ring - suggesting I have at least doubled or tripled the amount of contact the ring will have with the scope.</p></blockquote><p></p>
[QUOTE="azsugarbear, post: 2157109, member: 4809"] Years ago, I decided to lap a set of rings - mostly out of curiosity. The result was surprising. I expected some light, even wear over the entire surface. What I got was pronounced wear in one or two places. Having been turned on a lathe, the steel bar used in the process was perfectly concentric - which left only the rings as being 'out-of-round'. I was amazed and shocked at how only a small part of the ring was actually in contact with the body of the scope. I would estimate less than 15% of the ring is making contact with the tube. This is true of both inexpensive and high-end rings. Now 15% contact is probably enough to hold a scope, even with high recoil. But when I am spending thousands on a rifle, I want to eliminate any possible weaknesses that could negatively effect accuracy. The cost in time and money to lap rings is worth it to me for my own peace of mind. Like some have indicated, you can take too much off. I usually lap until I can see 30%-35% bare steel or aluminum on the bottom ring - suggesting I have at least doubled or tripled the amount of contact the ring will have with the scope. [/QUOTE]
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first time lapping rings
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