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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ballistics Question
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<blockquote data-quote="Bart B" data-source="post: 654872" data-attributes="member: 5302"><p>That one's their SIII SS 8-32x56 LR TD as I see it. Here's what I got doing the math with your data:</p><p></p><p>At 96 yards, one MOA is .9600 inch based on Sightron's info saying 1 MOA is one inch at 100 yards; that scope's 1/4 MOA clicks are supposed to move impact .2500 inch per hundred yards. At 96 yards, it should move impact exactly .2400 inch. .25 times .96 equals .2400.</p><p></p><p>If you moved your scope's adjustment 20 MOA, the reticule should have moved 19.20 inches at 96 yards. 20 times .96 equals 19.20 inches.</p><p></p><p>As the reticule moved 21 inches on a 96-yard target with a 20 MOA adjustment, the scope's reticule moved 21.875 MOA. 21 divided by .96 equals 21.875.</p><p></p><p>It took eighty 1/4 MOA clicks to move your scope 21 inches at 96 yards. That's .2625 inch per click. 21 inches divided by 80 equals .2625 inch; the number you came up with.</p><p></p><p>With one click supposed to move .2400 inch at 96 yards but actually moved .2625 inch, that's a +9.375% error. .2625 divided by .2400 equals 1.09375.</p><p></p><p>At 100 yards, the adjustments would move about .2734 inch per click.</p><p></p><p>1/4 of an angular (trig) MOA's equal to 0.25133 inch at 96 yards. If your scope's adjustments were spec'd in angular MOA's, it would have only a +4.445% error. </p><p></p><p>I would be interesting to find out what Sightron has to say about this.</p></blockquote><p></p>
[QUOTE="Bart B, post: 654872, member: 5302"] That one's their SIII SS 8-32x56 LR TD as I see it. Here's what I got doing the math with your data: At 96 yards, one MOA is .9600 inch based on Sightron's info saying 1 MOA is one inch at 100 yards; that scope's 1/4 MOA clicks are supposed to move impact .2500 inch per hundred yards. At 96 yards, it should move impact exactly .2400 inch. .25 times .96 equals .2400. If you moved your scope's adjustment 20 MOA, the reticule should have moved 19.20 inches at 96 yards. 20 times .96 equals 19.20 inches. As the reticule moved 21 inches on a 96-yard target with a 20 MOA adjustment, the scope's reticule moved 21.875 MOA. 21 divided by .96 equals 21.875. It took eighty 1/4 MOA clicks to move your scope 21 inches at 96 yards. That's .2625 inch per click. 21 inches divided by 80 equals .2625 inch; the number you came up with. With one click supposed to move .2400 inch at 96 yards but actually moved .2625 inch, that's a +9.375% error. .2625 divided by .2400 equals 1.09375. At 100 yards, the adjustments would move about .2734 inch per click. 1/4 of an angular (trig) MOA's equal to 0.25133 inch at 96 yards. If your scope's adjustments were spec'd in angular MOA's, it would have only a +4.445% error. I would be interesting to find out what Sightron has to say about this. [/QUOTE]
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