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<blockquote data-quote="goodgrouper" data-source="post: 105605" data-attributes="member: 2852"><p>[ QUOTE ]</p><p> Here's another variable....scope adjustment accuracy. Ever calibrate a scope's adjustments to see how far each click really changed point of impact? I've done this by putting a yardstick out at 50 yards, then benching the scope and moving the adjustments over 20 to 30 inches on the yardstick. A small percentage error is common. Evidence that if one makes a 30 MOA come up, the line of sight may move anywhere between 28 and 32 MOA depending on the scope make and model. Every internally adjusted scope I've checked ain't exactly dead-on; they all are a bit off. But each one is pretty repeatable for each click/MOA moving the same amount.</p><p></p><p>This happens because of the mechanical design of the scope. The clicks per turn for the thread count of the adjustment isn't exact for the erector tube's movement about the objective lens' primary image for perfect fractional MOA changes. But most scopes are within a few percent of being exact.</p><p></p><p>Once you know your scope's exact change per click/MOA, then you can convert the come ups from tables such as these to exactly what your scope needs to do </p><p></p><p>[/ QUOTE ] </p><p></p><p></p><p>Now that is probably the first post you've made that I agree with 100%. Very well said. /ubbthreads/images/graemlins/wink.gif</p></blockquote><p></p>
[QUOTE="goodgrouper, post: 105605, member: 2852"] [ QUOTE ] Here's another variable....scope adjustment accuracy. Ever calibrate a scope's adjustments to see how far each click really changed point of impact? I've done this by putting a yardstick out at 50 yards, then benching the scope and moving the adjustments over 20 to 30 inches on the yardstick. A small percentage error is common. Evidence that if one makes a 30 MOA come up, the line of sight may move anywhere between 28 and 32 MOA depending on the scope make and model. Every internally adjusted scope I've checked ain't exactly dead-on; they all are a bit off. But each one is pretty repeatable for each click/MOA moving the same amount. This happens because of the mechanical design of the scope. The clicks per turn for the thread count of the adjustment isn't exact for the erector tube's movement about the objective lens' primary image for perfect fractional MOA changes. But most scopes are within a few percent of being exact. Once you know your scope's exact change per click/MOA, then you can convert the come ups from tables such as these to exactly what your scope needs to do [/ QUOTE ] Now that is probably the first post you've made that I agree with 100%. Very well said. [img]/ubbthreads/images/graemlins/wink.gif[/img] [/QUOTE]
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