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Long Range Hunting & Shooting
Rifle shooting high consistently with drop chart
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<blockquote data-quote="Canadian Bushman" data-source="post: 1127354" data-attributes="member: 41122"><p>The erector tube is zeroed in the same place regardless of the scopes body, which is canted to move the erector tube closer to one end of adjustment. At the extreme ends of adjustment you risk the scope not tracking a true moa because the steep angle of the erector tube ( a couple degrees ). This effect is usually unnoticed, often exaggerated, and easily tested. </p><p></p><p>This could potentially blur the true measurement of the scopes centerline to the bores centerline but only by very small numbers that are not relevant to the op's post and often lost in the noise on much longer firing solutions.</p><p></p><p>I.E. - A change in .125 ( aprox 120moa on a 4" erector tube) to scope height on a 2000 yd shot is .1 moa difference in traj. Ive never shot within .1 moa at that distance.</p><p></p><p>If you measure to the center of the scope body you effectively cut this error in half.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 1127354, member: 41122"] The erector tube is zeroed in the same place regardless of the scopes body, which is canted to move the erector tube closer to one end of adjustment. At the extreme ends of adjustment you risk the scope not tracking a true moa because the steep angle of the erector tube ( a couple degrees ). This effect is usually unnoticed, often exaggerated, and easily tested. This could potentially blur the true measurement of the scopes centerline to the bores centerline but only by very small numbers that are not relevant to the op's post and often lost in the noise on much longer firing solutions. I.E. - A change in .125 ( aprox 120moa on a 4" erector tube) to scope height on a 2000 yd shot is .1 moa difference in traj. Ive never shot within .1 moa at that distance. If you measure to the center of the scope body you effectively cut this error in half. [/QUOTE]
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Rifle shooting high consistently with drop chart
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