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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Temperature effects
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<blockquote data-quote="rammac" data-source="post: 1920143" data-attributes="member: 27761"><p>You have two factors that are affected by temperature change.</p><p></p><p>The powder</p><p>The air density</p><p></p><p>Most powders produce more energy as their temperature increases.</p><p>Air density decreases as temperature increases.</p><p></p><p>The effect is that as the temperature increases the bullet's velocity will increase and the point of impact will be higher.</p><p></p><p>In general, at 500 yards, my .308 using a 180gr bullet will have about 3 to 4 MOA less drop at 85 degrees compared to 45 degrees.</p></blockquote><p></p>
[QUOTE="rammac, post: 1920143, member: 27761"] You have two factors that are affected by temperature change. The powder The air density Most powders produce more energy as their temperature increases. Air density decreases as temperature increases. The effect is that as the temperature increases the bullet's velocity will increase and the point of impact will be higher. In general, at 500 yards, my .308 using a 180gr bullet will have about 3 to 4 MOA less drop at 85 degrees compared to 45 degrees. [/QUOTE]
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Temperature effects
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