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Rifles, Reloading, Optics, Equipment
Gunsmithing
Thoughts on shimming windage
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<blockquote data-quote="Canadian Bushman" data-source="post: 1001893" data-attributes="member: 41122"><p>If your scope is not plum to the center of your rifles bore, or your level true to the verticle axis of your turret, you will know when shots began to drift left or right in proportion to the elevation dialed. </p><p></p><p>To check this get the tallest target feasable and draw a long verticle line. Use a plum bob to level this target. Then shoot 3 shot groups increasing elevation. I like to do 5 or 10 moa at a time and over the elevation you use most often. I try for 20-30 moa. </p><p></p><p>This lets me check the level of my optic and its actual adjustment value. </p><p></p><p>If they dont follow the line you know whats going on.</p><p></p><p>The same test can evaluate windage. Aka a box test.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 1001893, member: 41122"] If your scope is not plum to the center of your rifles bore, or your level true to the verticle axis of your turret, you will know when shots began to drift left or right in proportion to the elevation dialed. To check this get the tallest target feasable and draw a long verticle line. Use a plum bob to level this target. Then shoot 3 shot groups increasing elevation. I like to do 5 or 10 moa at a time and over the elevation you use most often. I try for 20-30 moa. This lets me check the level of my optic and its actual adjustment value. If they dont follow the line you know whats going on. The same test can evaluate windage. Aka a box test. [/QUOTE]
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Thoughts on shimming windage
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