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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Importance of T.O.F.???
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<blockquote data-quote="Jon A" data-source="post: 474391" data-attributes="member: 319"><p>The problem is the above assumption is incorrect. A high BC bullet starting slower will drift in the wind less than a low BC bullet if their time of flight is identical.</p><p></p><p>Think of the phrase "affected by environmental parameters" you used above. The best measure of that is how much velocity is lost on the way to the target, not the average velocity to the target. In the case above, both bullets average the same velocity to the target. The low BC bullet starts faster, ends slower which means it lost more velocity along the way. This means it was more "affected by the environment" than the high BC bullet. If the air slowed the bullet down more, it also pushed it sideways farther.</p><p></p><p>So as you can see, as far as wind drift is concerned, BC is a much more important value than TOF for any given distance. For drop, yes, TOF is what matters. But that's easy.</p></blockquote><p></p>
[QUOTE="Jon A, post: 474391, member: 319"] The problem is the above assumption is incorrect. A high BC bullet starting slower will drift in the wind less than a low BC bullet if their time of flight is identical. Think of the phrase "affected by environmental parameters" you used above. The best measure of that is how much velocity is lost on the way to the target, not the average velocity to the target. In the case above, both bullets average the same velocity to the target. The low BC bullet starts faster, ends slower which means it lost more velocity along the way. This means it was more "affected by the environment" than the high BC bullet. If the air slowed the bullet down more, it also pushed it sideways farther. So as you can see, as far as wind drift is concerned, BC is a much more important value than TOF for any given distance. For drop, yes, TOF is what matters. But that's easy. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Importance of T.O.F.???
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