Archived Posts » 59,699,509
Environmentals
4/9/2012 11:24:59 PM
Just checking my understanding. I don't get near enough range time. Ideally I could learn this stuff first hand, but it just doesn't happen with a total of 10-15 long-range days a year. Hopefully this fall I get stationed a little closer to home and will have the weekends to go home or out in the desert to play.
Rain/snow: Lonewolf says not a major issue, thanks for answering BTW
Altitude: Means nothing if you have accurate barometric pressure–– Altimeters get their readings from barometric pressure.
Humidity: Nearly negligible difference until you go well over 1000yd
Barometric Pressure: very important to know and keep track of throughout the day, one of the bigger causes of POI shift when switching shooting locations (mostly changing altitude and current weather)
Air temp (by itself, assuming the same MV through all air temps): small change in POI shift–– about 1.5MOA @1000yd with a .260 w/140gr. VLDs from 40 to 110 farenheit from playing around on JBM.
Ammo temp: big change in POI shift resulting from changes in MV
Coriolis: Get real...
Am I wrong or missing anything? I think it's time to buy a kestrel...
Rain/snow: Lonewolf says not a major issue, thanks for answering BTW
Altitude: Means nothing if you have accurate barometric pressure–– Altimeters get their readings from barometric pressure.
Humidity: Nearly negligible difference until you go well over 1000yd
Barometric Pressure: very important to know and keep track of throughout the day, one of the bigger causes of POI shift when switching shooting locations (mostly changing altitude and current weather)
Air temp (by itself, assuming the same MV through all air temps): small change in POI shift–– about 1.5MOA @1000yd with a .260 w/140gr. VLDs from 40 to 110 farenheit from playing around on JBM.
Ammo temp: big change in POI shift resulting from changes in MV
Coriolis: Get real...
Am I wrong or missing anything? I think it's time to buy a kestrel...
