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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
altitude and " MUZZLE " velocity
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<blockquote data-quote="BryanLitz" data-source="post: 658989" data-attributes="member: 7848"><p>I believe you're getting good information from the last two posts.</p><p></p><p>MV is not affected by altitude. As an aside, if you did chrono your MV at various altitudes, differences would probably be more related to variations in light conditions (and their effects on chronos) than real altitude effects. </p><p></p><p>Temperature does affect MV, but by a small amount; like 1/2 fps per degree for most single based powders.</p><p></p><p>The biggest effect of altitude is air pressure, which has the same effect as a higher BC. So the best way to manage altitude effects is to learn your predictive ballistics method (whatever you're using) well, and know how to apply the results.</p><p></p><p>Good luck and shoot straight,</p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 658989, member: 7848"] I believe you're getting good information from the last two posts. MV is not affected by altitude. As an aside, if you did chrono your MV at various altitudes, differences would probably be more related to variations in light conditions (and their effects on chronos) than real altitude effects. Temperature does affect MV, but by a small amount; like 1/2 fps per degree for most single based powders. The biggest effect of altitude is air pressure, which has the same effect as a higher BC. So the best way to manage altitude effects is to learn your predictive ballistics method (whatever you're using) well, and know how to apply the results. Good luck and shoot straight, -Bryan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
altitude and " MUZZLE " velocity
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