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Extreme Long Range Hunting & Shooting (ELR)
Mile Shot
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<blockquote data-quote="vinson" data-source="post: 941222" data-attributes="member: 40949"><p>You are both right and the reality is somewhere in between what you two describe.</p><p></p><p>WildRose, since (I assume) we can agree that a rifle capable of shooting exactly 1" 100 round groups at 100 yards and given perfect conditions (zero wind, solid rest, no ammo or shooter variance, etc) can shoot 10" 100 round groups at 1000 yards (with proper DOPE) we can demonstrate that a bullet passing directly into our 100 yard point of aim would have hit directly in the center of our 1000 yard point of aim. However the bullet that would have landed 1/2" left of our 100 yard POI would have landed 5" left of our POI at 1000.</p><p></p><p>Thus the effects of displacement on a bullet early on do of course have effects downrange. The bullet will continue on its deviated path and from 500 yards to 1000 will have (approximately) doubled in deviation given no more external inputs such as wind.</p><p></p><p>Bigngreen, what your segmented calculation demonstrates is not that the 0-500 wind is acting more on the bullet, that is definitely false, but since the bullet has that additional 500 or 1000 yards to continue on its deviated path it will and thus the apparent effect is larger at longer distances. It's not that the wind is pushing the slower bullet less at 500-1000 yards or 1000-1500 yards, its merely that the effects of that push have less time to compound. To support your main claim your calculation would have needed to only use 0-500 yards and show that the 10mph wind affected a faster FPS bullet more.</p><p></p><p>Thank you two for the opportunity to think about this and actually improve my thinking of the effects of wind on a bullet.</p><p></p><p>Vinson</p></blockquote><p></p>
[QUOTE="vinson, post: 941222, member: 40949"] You are both right and the reality is somewhere in between what you two describe. WildRose, since (I assume) we can agree that a rifle capable of shooting exactly 1" 100 round groups at 100 yards and given perfect conditions (zero wind, solid rest, no ammo or shooter variance, etc) can shoot 10" 100 round groups at 1000 yards (with proper DOPE) we can demonstrate that a bullet passing directly into our 100 yard point of aim would have hit directly in the center of our 1000 yard point of aim. However the bullet that would have landed 1/2" left of our 100 yard POI would have landed 5" left of our POI at 1000. Thus the effects of displacement on a bullet early on do of course have effects downrange. The bullet will continue on its deviated path and from 500 yards to 1000 will have (approximately) doubled in deviation given no more external inputs such as wind. Bigngreen, what your segmented calculation demonstrates is not that the 0-500 wind is acting more on the bullet, that is definitely false, but since the bullet has that additional 500 or 1000 yards to continue on its deviated path it will and thus the apparent effect is larger at longer distances. It's not that the wind is pushing the slower bullet less at 500-1000 yards or 1000-1500 yards, its merely that the effects of that push have less time to compound. To support your main claim your calculation would have needed to only use 0-500 yards and show that the 10mph wind affected a faster FPS bullet more. Thank you two for the opportunity to think about this and actually improve my thinking of the effects of wind on a bullet. Vinson [/QUOTE]
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