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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Canting formula
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<blockquote data-quote="Buffalobob" data-source="post: 108367" data-attributes="member: 8"><p>Are you asking about when the scope is so many degrees off of vertical over the barrel. In other words when the middle of the scope is not in direct vertical line with the center of the barrel?</p><p></p><p></p><p>To do the calculation you need to know the center of the scope height above the center of the barrel. You would then use the angle of the cant and either a sine angle times radius (scope height originally) and then against the internal cross hair adjustments. To get the windage error you would use a cosine to determine the effect. </p><p></p><p>you will have an error in the windage adjustments also and will need to make a similar but reverse calculation. Error may be additive or not depending on up or down and right versus left and right and which side the cant is on. </p><p></p><p>First verify what your question really is because it is a lot of work to build such a spread sheet as I have described.</p><p></p><p></p><p></p><p>I may have this backward because I have not gotten out a peice of paper and a penicl to draw out the angles and verify sine versus cosine and am just working with mental pictures.</p></blockquote><p></p>
[QUOTE="Buffalobob, post: 108367, member: 8"] Are you asking about when the scope is so many degrees off of vertical over the barrel. In other words when the middle of the scope is not in direct vertical line with the center of the barrel? To do the calculation you need to know the center of the scope height above the center of the barrel. You would then use the angle of the cant and either a sine angle times radius (scope height originally) and then against the internal cross hair adjustments. To get the windage error you would use a cosine to determine the effect. you will have an error in the windage adjustments also and will need to make a similar but reverse calculation. Error may be additive or not depending on up or down and right versus left and right and which side the cant is on. First verify what your question really is because it is a lot of work to build such a spread sheet as I have described. I may have this backward because I have not gotten out a peice of paper and a penicl to draw out the angles and verify sine versus cosine and am just working with mental pictures. [/QUOTE]
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Canting formula
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