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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Predicting a Bullet's B.C. ??????
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<blockquote data-quote="Bart B" data-source="post: 107141" data-attributes="member: 5302"><p><strong>Re: Predicting a Bullet\'s B.C. ??????</strong></p><p></p><p>I'd give Sierra Bullets the nod for having the best stuff around. They've done all their ballistic coefficient work with actual firing tests measuring time of flight. They came up with different BC's for each bullet depending on its speed through the air; some bullets have three or four BC's from the muzzle to target. The BC's they actually measured from other companies were often not nearly what was advertised.</p><p></p><p>I don't know of any software or book-based stuff that will enable one to design a bullet for a given BC then make them that will actually have that BC when fired. The air flow around the bullet varies with its speed and therefore so does its drag. You may be able to extrapolate a design by averaging shapes from a higher and lower BC bullet for what you want, but finding its actual BC can only be done by measuring its time of flight.</p></blockquote><p></p>
[QUOTE="Bart B, post: 107141, member: 5302"] [b]Re: Predicting a Bullet\'s B.C. ??????[/b] I'd give Sierra Bullets the nod for having the best stuff around. They've done all their ballistic coefficient work with actual firing tests measuring time of flight. They came up with different BC's for each bullet depending on its speed through the air; some bullets have three or four BC's from the muzzle to target. The BC's they actually measured from other companies were often not nearly what was advertised. I don't know of any software or book-based stuff that will enable one to design a bullet for a given BC then make them that will actually have that BC when fired. The air flow around the bullet varies with its speed and therefore so does its drag. You may be able to extrapolate a design by averaging shapes from a higher and lower BC bullet for what you want, but finding its actual BC can only be done by measuring its time of flight. [/QUOTE]
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Predicting a Bullet's B.C. ??????
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