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Old 05-06-2013, 05:38 AM   #50 (permalink)
Join Date: Jul 2006
Location: Czech Republic (middle Europe)

Originally Posted by neftaly View Post
I think you should be including height above sea level (atmospheric pressure) in the readings. Normalize them to 0m for comparisons.
95% of the population lives in altitudes below 4000 meters (Hypsographic demography: The distribution of human population by altitude) and the difference between 0 and 4000 meters is only 40 kPa = 5.8 psi (Air Pressure and Altitude above Sea Level).

So the differences caused by the altitude/atmospheric pressure are so small, that he plays no role. A little bigger effect can be perhaps on range, but not on muzzle velocity.
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