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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
BC effects from full value wind?
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<blockquote data-quote="Mikecr" data-source="post: 1720669" data-attributes="member: 1521"><p>Says someone who has never done it. Otherwise you'd know that the best you can do on paper is <em>predict</em> drag components summed to form factor for BC. From there field testing is needed to validate/adjust the numbers -always.</p><p>Much of this aerodynamics approach is born within racing and rocket sciences, and it's difficult even with ample resources.</p><p></p><p>Bullet shape absolutely affects drift in wind. Shape affects <u>drag</u>, which leads to lag, a primary component with wind drift.</p><p></p><p>BC is ultimately useful for drag and time of flight to target. There is no need for separate wind BC/drop BC considerations with free falling bullets.</p><p>Where observed wind drifts are out of line with calculations, the input numbers are wrong, or deficient with other ballistic attributes, like spin drift, or near -vs- far wind.</p><p>And 115gr bullets require higher spin than 105gr bullets, so this could lead to apparent discrepancies if not accounted for.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1720669, member: 1521"] Says someone who has never done it. Otherwise you'd know that the best you can do on paper is [I]predict[/I] drag components summed to form factor for BC. From there field testing is needed to validate/adjust the numbers -always. Much of this aerodynamics approach is born within racing and rocket sciences, and it's difficult even with ample resources. Bullet shape absolutely affects drift in wind. Shape affects [U]drag[/U], which leads to lag, a primary component with wind drift. BC is ultimately useful for drag and time of flight to target. There is no need for separate wind BC/drop BC considerations with free falling bullets. Where observed wind drifts are out of line with calculations, the input numbers are wrong, or deficient with other ballistic attributes, like spin drift, or near -vs- far wind. And 115gr bullets require higher spin than 105gr bullets, so this could lead to apparent discrepancies if not accounted for. [/QUOTE]
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BC effects from full value wind?
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