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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Scope Not Level With My Action
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<blockquote data-quote="Gcan" data-source="post: 1700468" data-attributes="member: 102867"><p>Thought Id add:</p><p></p><p></p><p></p><p>Initially I set my rifle/scopes up with a level and a plumb bob. I zero the rifle for elevation and windage at 100 yards. </p><p></p><p></p><p>I then dial in my ups and shoot 1000. From that point I never look to the level again. </p><p></p><p></p><p>I set up Precision machine tools for years. Its hard enough to dial in a couple thousandths with a 12" Precision level. I do not believe anyone can use a 2" level on a rifle scope and get an adjustment of 2 moa. That would be 3/10ths of one thousandth of rotation or .0003". </p><p></p><p></p><p>My jig has a 3.000" arm. (3" Radius) from center axis of scope tube to the contact point for a .0001 indicator. The diameter of the theoretical circle is 6.000". 6" x 3.1416" = 18.85" circumference/360 degrees = .0523" rotation per 1-degree. / 60 minutes of angle per degree = .000872" of rotation per MOA.</p><p></p><p>At some point tangent/secant (whatever) has to be converted into a linear distance that can be measured. </p><p></p><p></p><p>Once set up and the indicator zeroed, </p><p></p><p>The rings are loosened slightly. </p><p></p><p></p><p>The jig uses a captured jacking screw clamped to the scope that jacks against an arm mounted to the base to rotate the scope.</p><p></p><p></p><p>My jig holds the scope tube in relationship to the base and then uses an independent jacking arm with an indicator. I simply dial in the "fix" and lock the rings. I release the jacking clamp. If my indicator still shows the same value I'm done. </p><p></p><p></p><p>Once a rifle is set up like this the scope/rings are set to that gun's barrel only and cannot be switched to other guns without re setting to the new gun. </p><p></p><p></p><p>There will be no photos. Sorry. Took me a long time to design and build this thing. </p><p></p><p></p><p>Once done, a rifle with a quality scope will track +/- 0 MOA right/left windage to infinity and back to 100.</p></blockquote><p></p>
[QUOTE="Gcan, post: 1700468, member: 102867"] Thought Id add: Initially I set my rifle/scopes up with a level and a plumb bob. I zero the rifle for elevation and windage at 100 yards. I then dial in my ups and shoot 1000. From that point I never look to the level again. I set up Precision machine tools for years. Its hard enough to dial in a couple thousandths with a 12” Precision level. I do not believe anyone can use a 2” level on a rifle scope and get an adjustment of 2 moa. That would be 3/10ths of one thousandth of rotation or .0003”. My jig has a 3.000” arm. (3” Radius) from center axis of scope tube to the contact point for a .0001 indicator. The diameter of the theoretical circle is 6.000”. 6” x 3.1416” = 18.85” circumference/360 degrees = .0523” rotation per 1-degree. / 60 minutes of angle per degree = .000872” of rotation per MOA. At some point tangent/secant (whatever) has to be converted into a linear distance that can be measured. Once set up and the indicator zeroed, The rings are loosened slightly. The jig uses a captured jacking screw clamped to the scope that jacks against an arm mounted to the base to rotate the scope. My jig holds the scope tube in relationship to the base and then uses an independent jacking arm with an indicator. I simply dial in the “fix” and lock the rings. I release the jacking clamp. If my indicator still shows the same value I’m done. Once a rifle is set up like this the scope/rings are set to that gun’s barrel only and cannot be switched to other guns without re setting to the new gun. There will be no photos. Sorry. Took me a long time to design and build this thing. Once done, a rifle with a quality scope will track +/- 0 MOA right/left windage to infinity and back to 100. [/QUOTE]
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Scope Not Level With My Action
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