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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Altitude vs. Barometric pressure
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<blockquote data-quote="User4302021" data-source="post: 1518824" data-attributes="member: 105322"><p>Getting away from the differences in Station Pressure, Barometric pressure and Pressure Altitude and Density Altitude etc. ....here is the practical consideration.</p><p></p><p>If you have a reliable device that can accurately calculate Density Altitude at your exact location using direct sensory input, then you will likely be fine. However, that is not how it works many times. The input is often pulled from a signal station in some other location, giving inaccurate information to the shooter.</p><p></p><p> It is way too easy to get an instrument that gives absolute pressure and temperature at your exact location (I wear a G-Shock watch that gives both) to mess with possible errors in reporting DA. As has also been said, humidity is pretty insignificant. You can leave it at 50% and never notice the difference.</p></blockquote><p></p>
[QUOTE="User4302021, post: 1518824, member: 105322"] Getting away from the differences in Station Pressure, Barometric pressure and Pressure Altitude and Density Altitude etc. ....here is the practical consideration. If you have a reliable device that can accurately calculate Density Altitude at your exact location using direct sensory input, then you will likely be fine. However, that is not how it works many times. The input is often pulled from a signal station in some other location, giving inaccurate information to the shooter. It is way too easy to get an instrument that gives absolute pressure and temperature at your exact location (I wear a G-Shock watch that gives both) to mess with possible errors in reporting DA. As has also been said, humidity is pretty insignificant. You can leave it at 50% and never notice the difference. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Altitude vs. Barometric pressure
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