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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Powder thermal sensitivity
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<blockquote data-quote="paul scrobohaci" data-source="post: 2949687" data-attributes="member: 112087"><p>In a nutshell, I wanted to see how muzzle velocity is affected by powder temperature for Vihtavuori N565 powder.</p><p>I found that MV velocity goes up about 0.33 FPS per degree F for a 300 Win Mag round containing 75.2 G of powder with a 168 G TTSX bullet, CCI large magnum #250 primer, Lapua brass, shot out of a 26'' barrel.</p><p></p><p>I think that 0.33 FPS per degree F indicates very small sensitivity.</p><p>On an average day where temp varies by 50F, MV won't vary by much more than +/- 8 FPS which is less than the ES most guys get consistently.</p><p></p><p>Details in my next post.</p></blockquote><p></p>
[QUOTE="paul scrobohaci, post: 2949687, member: 112087"] In a nutshell, I wanted to see how muzzle velocity is affected by powder temperature for Vihtavuori N565 powder. I found that MV velocity goes up about 0.33 FPS per degree F for a 300 Win Mag round containing 75.2 G of powder with a 168 G TTSX bullet, CCI large magnum #250 primer, Lapua brass, shot out of a 26'' barrel. I think that 0.33 FPS per degree F indicates very small sensitivity. On an average day where temp varies by 50F, MV won't vary by much more than +/- 8 FPS which is less than the ES most guys get consistently. Details in my next post. [/QUOTE]
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