- Jan 5, 2015
Fyi; I have measured barometric pressure of 21” Hg at 4400’ on a bluebird day. Powell, WY. Of course the load I was shooting that day impacted 4 moa higher than it does at 900’ and 30” Hg.If he verified with kestrel then it already uses the correct atmospherics. No need to confuse anyone about station pressure or density of air.
More about that in a second.
BC won’t have a extreme effect from the off the box. Not at 600. Maybe at 1k but that around 1 moa most between .300 and .311 at 1k.
The problem more than likely lies in the weird system the OP is using with 2 inch high @ 100 but zero’d at 255 and the the data input into the system. Another problem could be using hornady app? If that’s the case, and I could be wrong, but I’m pretty sure they only use hornady bullets…which inherently use hornady bullet form factors.
However, to revisit the atmospherics, I don’t think you can have a station pressure of 26.45 in that temp at that altitude unless you were shooting in the eye of a major storm…
My logic based on a simple DA chart as admittedly I’m not a meteorologist.
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