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Rifles, Reloading, Optics, Equipment
Reloading
105gr berger VLD
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<blockquote data-quote="Wile E Coyote" data-source="post: 586228" data-attributes="member: 28381"><p>Someone gave me this equation a while back. It is called the Greenhill Formula. Out of curiosity, I have done the math on a few of my rifles with the bullets that shoot well and it does work as long as one allows for some wiggle room.</p><p> </p><p> </p><p><img src="http://upload.wikimedia.org/wikipedia/en/math/8/4/d/84d1d28d700535884f8a2c2c2403b641.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p></p><p>where:</p><ul> <li data-xf-list-type="ul">C = 150 (use 180 for muzzle velocities higher than 2,800 f/s)</li> <li data-xf-list-type="ul">D = bullet's diameter in inches</li> <li data-xf-list-type="ul">L = bullet's length in inches</li> <li data-xf-list-type="ul">SG = bullet's <a href="http://en.wikipedia.org/wiki/Specific_gravity" target="_blank">specific gravity</a> (10.9 for lead-core bullets, which cancels out the second half of the equation)</li> </ul></blockquote><p></p>
[QUOTE="Wile E Coyote, post: 586228, member: 28381"] Someone gave me this equation a while back. It is called the Greenhill Formula. Out of curiosity, I have done the math on a few of my rifles with the bullets that shoot well and it does work as long as one allows for some wiggle room. [IMG]http://upload.wikimedia.org/wikipedia/en/math/8/4/d/84d1d28d700535884f8a2c2c2403b641.png[/IMG] where: [LIST] [*]C = 150 (use 180 for muzzle velocities higher than 2,800 f/s) [*]D = bullet's diameter in inches [*]L = bullet's length in inches [*]SG = bullet's [URL="http://en.wikipedia.org/wiki/Specific_gravity"]specific gravity[/URL] (10.9 for lead-core bullets, which cancels out the second half of the equation) [/LIST] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
105gr berger VLD
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