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Standard Atmospheric Pressure for Long Range Shooting

Cal October 19, 2012 Ballistics, Reference Comments Off on Standard Atmospheric Pressure for Long Range Shooting

I’ve found myself needing to reference this info a lot while making data cards. It indicates the standard atmospheric pressure at different elevations. Pressure can vary quite a bit from the “standard” listed here, and although that won’t make much of a difference at short or mid ranges … when you get out to 1,000 yards or beyond it can make a noticeable difference. If you know the specific pressure the day you are shooting, it could really help your ballistics tables be more accurate. Having a Kestrel that can measure the instantaneous pressure is the best solution.

Altitude (ft) Pressure (inHg)
0 (Sea Level) 29.92
1,000 29.86
2,000 27.82
3,000 26.82
4,000 25.84
5,000 24.90
6,000 23.98
7,000 23.09
8,000 22.23
9,000 21.39
10,000 20.58
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Cal Zant is the shooter/author behind PrecisionRifleBlog.com. Cal is a life-long learner, and loves to help others get into this sport he's so passionate about. His engineering background, unique data-driven approach, and ability to present technical and complex information in a unbiased and straight-forward fashion has quickly caught the attention of the industry. For more info on Cal, check out PrecisionRifleBlog.com/About.

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