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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
9 o'clock vs. 3 o'clock wind drifts different with same wind velocity???
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<blockquote data-quote="paphil" data-source="post: 614279" data-attributes="member: 17745"><p>Bart, My 6.5-284 is 0'ed at 300 yards and takes exactly 22 moa at 1000 feet elevation and 75 degrees for a 1k shot . It has a BC of .615 with berger bullets and a velocity of 2942 fps. First group in competion last year was a 4.21" five shot group at the Harry Davis memorial club in W. Va. (Check the records on their website) Haven't shot that small sense then but did kill 4 groundhogs at 1200 yards with a total of 5 shots. The gun shoots better than I can. 2 degrees works for me. It doesn"t matter if the scope is not square to the gun, or even if the reticle is square. What must be rotated is the adjuster mechanism inside the scope. Some reticles can be rotated as much as three degrees out of alignment with the adjustment mechanism. I believe this accounts for some guns having more or less than the average 9" that is mentioned. I recently talked to a fellow at the DSC show that claimed 9" left drift. Shoot the vertical test at 100 yds and see if you are right , left or dead on . Dial 100 and shoot, then dial 1000 and shoot at the same mark. Group should fall on the vertical line to have the reticle and mechanism square. I want mine to be about 3/4 to 1 inch left. This pretty much accounts for about 9 inches of drift. Just reread this and don't mean to turn anything inside scope just to be aware that without testing, canting could help or worsen depending on how the reticle alines with the mechanism inside the scope. It is NOT a user fixable problem!</p></blockquote><p></p>
[QUOTE="paphil, post: 614279, member: 17745"] Bart, My 6.5-284 is 0'ed at 300 yards and takes exactly 22 moa at 1000 feet elevation and 75 degrees for a 1k shot . It has a BC of .615 with berger bullets and a velocity of 2942 fps. First group in competion last year was a 4.21" five shot group at the Harry Davis memorial club in W. Va. (Check the records on their website) Haven't shot that small sense then but did kill 4 groundhogs at 1200 yards with a total of 5 shots. The gun shoots better than I can. 2 degrees works for me. It doesn"t matter if the scope is not square to the gun, or even if the reticle is square. What must be rotated is the adjuster mechanism inside the scope. Some reticles can be rotated as much as three degrees out of alignment with the adjustment mechanism. I believe this accounts for some guns having more or less than the average 9" that is mentioned. I recently talked to a fellow at the DSC show that claimed 9" left drift. Shoot the vertical test at 100 yds and see if you are right , left or dead on . Dial 100 and shoot, then dial 1000 and shoot at the same mark. Group should fall on the vertical line to have the reticle and mechanism square. I want mine to be about 3/4 to 1 inch left. This pretty much accounts for about 9 inches of drift. Just reread this and don't mean to turn anything inside scope just to be aware that without testing, canting could help or worsen depending on how the reticle alines with the mechanism inside the scope. It is NOT a user fixable problem! [/QUOTE]
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9 o'clock vs. 3 o'clock wind drifts different with same wind velocity???
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