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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Effects of atmospheric pressure on bullet drop at long range.
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<blockquote data-quote="Greyfox" data-source="post: 2345697" data-attributes="member: 10291"><p>Temperature and pressure surely effect trajectory at the longer ranges(500-1000+yards). In my early LRH years, a bullet with a G7 of .300-.320 and 2975- 3000FPS velocity, I would apply 1-2 clicks/1000ft of elevation change compounded with 1-2 clicks/20F change in temperature. These adjustments were mentally calculated and applied from 500-1000 yards. With practice I could connect with a high level of constancy. For the past 10 years or so I've used a G7 Ballistic RF for fast and concise corrections. If necessary, I will tune/calibrate actual POI with velocity inputs out to 400-600 yards, and BC at the longer ranges. Given an accurate wind dope and a solid rest, first shot hit confidence is very high</p></blockquote><p></p>
[QUOTE="Greyfox, post: 2345697, member: 10291"] Temperature and pressure surely effect trajectory at the longer ranges(500-1000+yards). In my early LRH years, a bullet with a G7 of .300-.320 and 2975- 3000FPS velocity, I would apply 1-2 clicks/1000ft of elevation change compounded with 1-2 clicks/20F change in temperature. These adjustments were mentally calculated and applied from 500-1000 yards. With practice I could connect with a high level of constancy. For the past 10 years or so I’ve used a G7 Ballistic RF for fast and concise corrections. If necessary, I will tune/calibrate actual POI with velocity inputs out to 400-600 yards, and BC at the longer ranges. Given an accurate wind dope and a solid rest, first shot hit confidence is very high [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Effects of atmospheric pressure on bullet drop at long range.
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