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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
"Point Blank" Ballistic Programs?
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<blockquote data-quote="Nicholas" data-source="post: 23330" data-attributes="member: 281"><p>I am using the Point Blank Ballistic program to calculate the ballistics for my 308 win.</p><p></p><p>With the conditions I'm shooting under then the program says I need 38 moa to be zeroed @ 1000 yards from my 100 yard zero. But I actually need 42.5 moa. Is this amount of error typical of Ballistic programs?</p><p></p><p>Here's my data if someone would please verify it on another program for me:</p><p></p><p>175 grain Matchking BC=.496</p><p>Velocity is 2640-50 fps</p><p>elevation is 5000 ft above sea level</p><p>temperature is 90 degrees</p><p>scope height is 1.5 inches</p><p></p><p>The reason I am asking is because I was rereading Blaine Fields post "Why a Knowledge of Ballistics" where his 1 in 12 twist barrel was having issues with the heavier projectiles at 1000 yards. I was able to consistantly hit at 1000 yards so I don't think my 1 in 12 barrel is having problems, but I thought I'd ask anyway.</p></blockquote><p></p>
[QUOTE="Nicholas, post: 23330, member: 281"] I am using the Point Blank Ballistic program to calculate the ballistics for my 308 win. With the conditions I'm shooting under then the program says I need 38 moa to be zeroed @ 1000 yards from my 100 yard zero. But I actually need 42.5 moa. Is this amount of error typical of Ballistic programs? Here's my data if someone would please verify it on another program for me: 175 grain Matchking BC=.496 Velocity is 2640-50 fps elevation is 5000 ft above sea level temperature is 90 degrees scope height is 1.5 inches The reason I am asking is because I was rereading Blaine Fields post "Why a Knowledge of Ballistics" where his 1 in 12 twist barrel was having issues with the heavier projectiles at 1000 yards. I was able to consistantly hit at 1000 yards so I don't think my 1 in 12 barrel is having problems, but I thought I'd ask anyway. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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"Point Blank" Ballistic Programs?
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