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#2
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Yes, less dense air, less air to consume, temp. Enter your data into a ballistic calculator for details.
But wont matter at short distances.
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#4
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Yup,... various apps on the market for that.
I use Ballistic AE for iOS http://ballistic.zdziarski.com/ Excellent application too, great learning tool as well. |
#5
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You will shoot higher. Also it will take more powder to show high pressure signs.
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A 30cal will reach out and touch them. A 50cal will kick their butt. NRA Life Member, NRA certified RSO & Basic Pistol Instructor, Hunter, shooter, reloader SCI, Manteca Sportsmen Club, Coalinga Rifle Club, Escalon Sportsmans Club & NAHA Member, Madison Society member |
#6
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Lower air density equals less drag, therefore velocity drop is less across distance and therefore bullet gets there faster which equals less drop. Time to target equals drop because gravity is the constant in play here.
Humidity will effect this too. Denser air always = more drag/drop across specific distance. Basic calculators will not always support these functions. I like RSI Shooting Lab: http://www.shootingsoftware.com/ballistics.htm |
#7
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Yes. Watch this: https://www.youtube.com/watch?v=socvpNPi6DA
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#8
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Altitude makes a huge difference. I have a friend in new Mexico that routinely shoots 168 Sierras out of a 308 to 1000 yards without much difficulty. He's at 5000+ feet in elevation. Where I shoot out here is just under 1500 feet in elevation, and the same bullet shot under very similar conditions with the exception of elevation is a complete turd at 1000 yards. Down here they transition to subsonic at around 800 to 850 yards. After that they just spin end over end and normally group within about 6 to 8 feet at 1000 yards.
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U.S. Navy (Retired) 1994-2015 |
#9
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Thanks guys! Good info. Sure makes sense that elevation would effect a bullet. Nice to have facts, reference points and real experience you have presented.
Brian |
#11
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It's all about air density.
1) Altitude - big factor 2) Air Temp (higher temp less dense) - big factor, not as big as Altitude unless temps are at extremes. 3) Humidity (More humid less dense) - small factor, for all intents ignore it. It has the biggest impact at greater distances. Pilots think about it a lot, they call it Density Altitude.
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When asked what qualities he most valued in his generals, Napoleon said, "give me lucky ones." Last edited by Bill Steele; 02-01-2013 at 4:38 PM.. |
#12
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#14
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It takes at least a couple thousand foot difference to have much effect. |
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