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Ballistic calculator
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<blockquote data-quote="7mmRHB" data-source="post: 318658" data-attributes="member: 3584"><p>Eric, it is possible that you're using MOA on the ballistic calculator, when your scope is moving in IPHY !! You didn't say what scope you are using but if it's a Leupold it will be moving in inches as do many others. Obviously it would take more clicks to get dialed in and would account for the discrepancy you're seeing.</p><p></p><p>No need to shoot to test the scope, just put a grid on some cardboard measured in inches with numbers big enough to see at 100 yds, starting with the Zero at the top and numbered down to 33 or so inches. Anchor your gun in a shooting rest ( tape or weight it down ), put the grid at exactly 100 yards and line up your crosshair on the zero. Carefully dial up the scope and see how far it actually moves in one and two revolutions of the turret and see if it returns to zero each time. Make sure you get the paralax adjusted out before you start. </p><p></p><p>You'll know in a few seconds if your scope is IPHY or true MOA!!</p><p></p><p>Goodgrouper and I do this on each clients gun before load testing. You would be shocked at the number of clunkers that show up on this simple test !!! ----- RHB</p></blockquote><p></p>
[QUOTE="7mmRHB, post: 318658, member: 3584"] Eric, it is possible that you're using MOA on the ballistic calculator, when your scope is moving in IPHY !! You didn't say what scope you are using but if it's a Leupold it will be moving in inches as do many others. Obviously it would take more clicks to get dialed in and would account for the discrepancy you're seeing. No need to shoot to test the scope, just put a grid on some cardboard measured in inches with numbers big enough to see at 100 yds, starting with the Zero at the top and numbered down to 33 or so inches. Anchor your gun in a shooting rest ( tape or weight it down ), put the grid at exactly 100 yards and line up your crosshair on the zero. Carefully dial up the scope and see how far it actually moves in one and two revolutions of the turret and see if it returns to zero each time. Make sure you get the paralax adjusted out before you start. You'll know in a few seconds if your scope is IPHY or true MOA!! Goodgrouper and I do this on each clients gun before load testing. You would be shocked at the number of clunkers that show up on this simple test !!! ----- RHB [/QUOTE]
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