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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
bullet drop and scope leveling
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<blockquote data-quote="Michael Eichele" data-source="post: 103235" data-attributes="member: 1007"><p>[ QUOTE ]</p><p> I once fired 30 rounds alternating between a 100- and 1000-yard target at 5 AM when the air was so calm and clear I could see bullet holes in the black at 1000 yards. The 15-shot groups at 100 and 1000 yards were centered for windage but the close one was some 40-odd inches high and straight up (measured with plumb line) from the aiming mark. Whatever drift effect there was didn't matter; it wasn't visible. </p><p></p><p>[/ QUOTE ]</p><p></p><p>Sometimes if a shooters scope is not quite level with the rifle and happens to be in the right direction as you click or use hold overs for that matter it compensates for the spin drift leading one to believe that it doesnt exist. I assure you that this is a scientifec fact that spin drift occurs. Whether or not ones equipment is set up correct or not is another story. Personaly I have a right handed twist and know what my drift values are through tests and have my scope ever so slightly off of perfectly plumb. As I use clicks or hold overs it takes the guess work out of holding off to the left. My rifle is level and the level mounted to my scope reads level, but the scope is not quite level.</p><p></p><p>If you have never experianced spin drift and you were shooting in a DEAD still air enviornment you were none other than lucky to have screwed up mounting your scope and did something right. /ubbthreads/images/graemlins/wink.gif</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 103235, member: 1007"] [ QUOTE ] I once fired 30 rounds alternating between a 100- and 1000-yard target at 5 AM when the air was so calm and clear I could see bullet holes in the black at 1000 yards. The 15-shot groups at 100 and 1000 yards were centered for windage but the close one was some 40-odd inches high and straight up (measured with plumb line) from the aiming mark. Whatever drift effect there was didn’t matter; it wasn’t visible. [/ QUOTE ] Sometimes if a shooters scope is not quite level with the rifle and happens to be in the right direction as you click or use hold overs for that matter it compensates for the spin drift leading one to believe that it doesnt exist. I assure you that this is a scientifec fact that spin drift occurs. Whether or not ones equipment is set up correct or not is another story. Personaly I have a right handed twist and know what my drift values are through tests and have my scope ever so slightly off of perfectly plumb. As I use clicks or hold overs it takes the guess work out of holding off to the left. My rifle is level and the level mounted to my scope reads level, but the scope is not quite level. If you have never experianced spin drift and you were shooting in a DEAD still air enviornment you were none other than lucky to have screwed up mounting your scope and did something right. [img]/ubbthreads/images/graemlins/wink.gif[/img] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
bullet drop and scope leveling
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