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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="load" data-source="post: 465254" data-attributes="member: 22789"><p>it will also vary depending on bullet length vs rifle twist. a short bullet spun at a 1 in 9 will "stand up" more than a longer bullet will when spun and the same rate. the key to minimizing the effect is to fire a ballistically balanced bullet/twist/volocity that will point as directly at the target as possible while still remaining stablegun)</p><p>as for corialis i usually input 1/4 moa left for 1000 1/2 left for 1500 and 3/4 left for 1760 assuming 45 degree lat. directly east/west shooting just remember the target is rising to you when shooting west you'll shoot low so adjust up <a href="mailto:1/4@1000">1/4@1000</a> <a href="mailto:1/2@1500">1/2@1500</a> <a href="mailto:3/4@1760">3/4@1760</a> and opposite for east shooting. for east/south or west/north or any other combo simply dividing into 3 sectors will get you close enouph so lets say you <a href="mailto:nnw@1760">nnw@1760</a> yrds you'd only have to vertically adjust as close to 3/16 moa up while nw would be as close to 3/8 moa and wwn being 5/8. of course this is not perfect it works for as closer than you can dial again assuming 45 degrees lat. this assumes 2850 fps mean volocity and a bullet with a 5.75 bc </p><p>clear as mud <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="load, post: 465254, member: 22789"] it will also vary depending on bullet length vs rifle twist. a short bullet spun at a 1 in 9 will "stand up" more than a longer bullet will when spun and the same rate. the key to minimizing the effect is to fire a ballistically balanced bullet/twist/volocity that will point as directly at the target as possible while still remaining stablegun) as for corialis i usually input 1/4 moa left for 1000 1/2 left for 1500 and 3/4 left for 1760 assuming 45 degree lat. directly east/west shooting just remember the target is rising to you when shooting west you'll shoot low so adjust up [EMAIL="1/4@1000"]1/4@1000[/EMAIL] [EMAIL="1/2@1500"]1/2@1500[/EMAIL] [EMAIL="3/4@1760"]3/4@1760[/EMAIL] and opposite for east shooting. for east/south or west/north or any other combo simply dividing into 3 sectors will get you close enouph so lets say you [EMAIL="nnw@1760"]nnw@1760[/EMAIL] yrds you'd only have to vertically adjust as close to 3/16 moa up while nw would be as close to 3/8 moa and wwn being 5/8. of course this is not perfect it works for as closer than you can dial again assuming 45 degrees lat. this assumes 2850 fps mean volocity and a bullet with a 5.75 bc clear as mud :) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
SPIN DRIFT!....I'm such a dummy
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