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Hunting
Long Range Hunting & Shooting
Cold temp affecting terminal performance of plastic tipped bullets
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<blockquote data-quote="Hand Skills" data-source="post: 1364484" data-attributes="member: 103303"><p>For the IMR powders, each change of <strong>temperature</strong> of one degree Farenheit changes the <strong>muzzle velocity</strong> by 1.7 fps in the same direction. Thus, and increase in the <strong>temperature</strong> of the powder amounting to 20 Farenheit could be expected to increase theMV by 34 fps. </p><p></p><p>Ok, so let's go big, and suppose 100deg F delta T;</p><p></p><p>That's 170FPS</p><p></p><p>Let's go slow, and suppose MV of 3000FPS ~ 5%</p><p></p><p>I would put that in the 'contributing factors' category.</p></blockquote><p></p>
[QUOTE="Hand Skills, post: 1364484, member: 103303"] For the IMR powders, each change of [B]temperature[/B] of one degree Farenheit changes the [B]muzzle velocity[/B] by 1.7 fps in the same direction. Thus, and increase in the [B]temperature[/B] of the powder amounting to 20 Farenheit could be expected to increase theMV by 34 fps. Ok, so let's go big, and suppose 100deg F delta T; That's 170FPS Let's go slow, and suppose MV of 3000FPS ~ 5% I would put that in the 'contributing factors' category. [/QUOTE]
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Cold temp affecting terminal performance of plastic tipped bullets
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