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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Effects of atmospheric pressure on bullet drop at long range.
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<blockquote data-quote="Hugnot" data-source="post: 2345858" data-attributes="member: 115658"><p>OP did compensate for -10 degree down as shown by 2 different ballistic solutions that both produced 10 MOA elevation needed at 590 yards and the OP dialed 10.25 MOA. I think, up to 600 environmental factor differences negligible. I think, actual air density a combo of temp, humidity, barometric pressure more important than just altitude numbers. Pre GPS altitude was calculated by barometers calibrated at some base station where elevation was known.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2345858, member: 115658"] OP did compensate for -10 degree down as shown by 2 different ballistic solutions that both produced 10 MOA elevation needed at 590 yards and the OP dialed 10.25 MOA. I think, up to 600 environmental factor differences negligible. I think, actual air density a combo of temp, humidity, barometric pressure more important than just altitude numbers. Pre GPS altitude was calculated by barometers calibrated at some base station where elevation was known. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Effects of atmospheric pressure on bullet drop at long range.
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