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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Altitude vs. Barometric pressure
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<blockquote data-quote="Michael Eichele" data-source="post: 74063" data-attributes="member: 1007"><p>Micke CR, I know where you are going with the standard pressure at altitude. It does calculate "standard pressure at altitude" but it NEEDS a starting point. That starting point is 29.92. From that point it calculates the differance from the altitude input. Some programs use 29.53. 29.92 works best in mine with the formulas used here. It is DEADLY accurate.</p><p></p><p>In other words, once the altitude box is selected and pressure dissapears, it has to default to a specified standard so as to cancel out any other input a user may have entered. Otherwise it calculates them together (thats bad!) </p><p></p><p>I hope that helps.</p><p></p><p>Jeff in TX thanks for the input also.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 74063, member: 1007"] Micke CR, I know where you are going with the standard pressure at altitude. It does calculate "standard pressure at altitude" but it NEEDS a starting point. That starting point is 29.92. From that point it calculates the differance from the altitude input. Some programs use 29.53. 29.92 works best in mine with the formulas used here. It is DEADLY accurate. In other words, once the altitude box is selected and pressure dissapears, it has to default to a specified standard so as to cancel out any other input a user may have entered. Otherwise it calculates them together (thats bad!) I hope that helps. Jeff in TX thanks for the input also. [/QUOTE]
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Altitude vs. Barometric pressure
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