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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cosine or degrees which do you prefer?
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<blockquote data-quote="BryanLitz" data-source="post: 331026" data-attributes="member: 7848"><p>RHB,</p><p></p><p>Multiplying the <strong><em>range</em></strong> by the cosine provides a very rough estimate. However, if you multiply the bullet <strong><em>drop</em></strong> by the cosine, it provides a much closer estimate. </p><p></p><p>Ultimately calculating a trajectory with degrees is the most accurate way, but the estimate provided by multiplying drop by the cosine is quite close.</p><p></p><p>As an example, consider a typical trajectory that's -314.3" low at 1000 yards for a level fire scenario. Incline the trajectory by 30 degrees, and the drop is now -271.4". If you approximate the drop by: -314.3" * cos(30) the answer is -272.2", which is only 0.6" different than the direct calculation.</p><p></p><p>-Bryan</p></blockquote><p></p>
[QUOTE="BryanLitz, post: 331026, member: 7848"] RHB, Multiplying the [B][I]range[/I][/B] by the cosine provides a very rough estimate. However, if you multiply the bullet [B][I]drop[/I][/B] by the cosine, it provides a much closer estimate. Ultimately calculating a trajectory with degrees is the most accurate way, but the estimate provided by multiplying drop by the cosine is quite close. As an example, consider a typical trajectory that's -314.3" low at 1000 yards for a level fire scenario. Incline the trajectory by 30 degrees, and the drop is now -271.4". If you approximate the drop by: -314.3" * cos(30) the answer is -272.2", which is only 0.6" different than the direct calculation. -Bryan [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cosine or degrees which do you prefer?
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