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Hunting
Long Range Hunting & Shooting
Hunting with the Lapua Scenar bullet (muzzle velocity above 3000fps)
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<blockquote data-quote="WildRose" data-source="post: 1194190" data-attributes="member: 30902"><p>There are several things that contribute to the BC of a bullet with sectional density being one along with the drag coefficient, velocity and RPM's.</p><p></p><p>The RPM's are dependent on two things, the rate of twist and the muzzle velocity.</p><p></p><p>The spin is necessary to prevent both wobbling/yaw and tumbling/flipping end over end.</p><p></p><p>There are some fairly complicated formulas for calculating the ballistic coefficient and there are different BC's as well. We generally talk in terms of the G1 and G7 BC's here.</p><p></p><p>Also, the calculated BC will be different than true BC because as a bullet slows down the BC goes down. The calculated BC is basically an estimation.</p><p></p><p>Here's one pretty good article on it.</p><p></p><p><a href="http://www.exteriorballistics.com/ebexplained/articles/the_ballistic_coefficient.pdf" target="_blank">http://www.exteriorballistics.com/ebexplained/articles/the_ballistic_coefficient.pdf</a></p></blockquote><p></p>
[QUOTE="WildRose, post: 1194190, member: 30902"] There are several things that contribute to the BC of a bullet with sectional density being one along with the drag coefficient, velocity and RPM's. The RPM's are dependent on two things, the rate of twist and the muzzle velocity. The spin is necessary to prevent both wobbling/yaw and tumbling/flipping end over end. There are some fairly complicated formulas for calculating the ballistic coefficient and there are different BC's as well. We generally talk in terms of the G1 and G7 BC's here. Also, the calculated BC will be different than true BC because as a bullet slows down the BC goes down. The calculated BC is basically an estimation. Here's one pretty good article on it. [url]http://www.exteriorballistics.com/ebexplained/articles/the_ballistic_coefficient.pdf[/url] [/QUOTE]
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Hunting with the Lapua Scenar bullet (muzzle velocity above 3000fps)
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