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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
SPIN DRIFT!....I'm such a dummy
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<blockquote data-quote="paphil" data-source="post: 552891" data-attributes="member: 17745"><p>Bart, with that setup the bullet is dead on at 100 yards. It only is left after you crank on 1000 yards of elevation and still aim at the 100 yard bullseye . It will be about 28 inches high and I want it to strike about 1 inch left. Spin drift is there at all distances and this method eliminates most of it. You have to know what your gun does, I've read articles that state the 30-06 drifts 14 inches. It depends on time of flight, BC, twist rate and weight of the bullet. Someone posted that a round ball might drift several feet. All I can do is work with my data for my gun and my only intension for posting here is to help anyone else who is open minded enough to think about what has been said and possibly experiment a little and see if it works for them. The method you talked about , using a vise and following a line on the wall will work to see if the cross hair is not plumb with the scope mechanism but you will not see spin drift without firing a shot. Brian Litz probably has a computer program that would do it but I don't. I just use what I have .</p></blockquote><p></p>
[QUOTE="paphil, post: 552891, member: 17745"] Bart, with that setup the bullet is dead on at 100 yards. It only is left after you crank on 1000 yards of elevation and still aim at the 100 yard bullseye . It will be about 28 inches high and I want it to strike about 1 inch left. Spin drift is there at all distances and this method eliminates most of it. You have to know what your gun does, I've read articles that state the 30-06 drifts 14 inches. It depends on time of flight, BC, twist rate and weight of the bullet. Someone posted that a round ball might drift several feet. All I can do is work with my data for my gun and my only intension for posting here is to help anyone else who is open minded enough to think about what has been said and possibly experiment a little and see if it works for them. The method you talked about , using a vise and following a line on the wall will work to see if the cross hair is not plumb with the scope mechanism but you will not see spin drift without firing a shot. Brian Litz probably has a computer program that would do it but I don't. I just use what I have . [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
SPIN DRIFT!....I'm such a dummy
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