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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet batch weight variation
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<blockquote data-quote="Topshot" data-source="post: 299189" data-attributes="member: 13285"><p>Thanks J E,</p><p>I put this question to Bryan Litz after readeding his great new book. Your thoughts pretty much line up with what Bryan had to say.</p><p> </p><p>This is what he came up with....................................</p><p> </p><p>................. "a difference of 2.6 grains is just over 1% variation in weight. Assuming 2900 fps MV, this difference in BC would only affect your drop at 1000 yards by 1.8" (from a 100 yard zero).</p><p>That amount of weight variation would produce the same vertical dispersion as an 8 fps variation in MV"................................................................</p><p></p><p>So it seems that with a constant form factor, all you need to do is work out the muzzle velocity variation. Then run the program to work out the trajectory for each of the velocities at the extreme spread. The difference in trajectories is the maximum drop variation, ,maybe?</p><p> </p><p>As you said "J,E", I will only know after I have shot them for comparision.</p></blockquote><p></p>
[QUOTE="Topshot, post: 299189, member: 13285"] Thanks J E, I put this question to Bryan Litz after readeding his great new book. Your thoughts pretty much line up with what Bryan had to say. This is what he came up with.................................... ................. "a difference of 2.6 grains is just over 1% variation in weight. Assuming 2900 fps MV, this difference in BC would only affect your drop at 1000 yards by 1.8" (from a 100 yard zero). That amount of weight variation would produce the same vertical dispersion as an 8 fps variation in MV"................................................................ So it seems that with a constant form factor, all you need to do is work out the muzzle velocity variation. Then run the program to work out the trajectory for each of the velocities at the extreme spread. The difference in trajectories is the maximum drop variation, ,maybe? As you said "J,E", I will only know after I have shot them for comparision. [/QUOTE]
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Bullet batch weight variation
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