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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
A-tips on game?
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<blockquote data-quote="dennisinaz" data-source="post: 1676983" data-attributes="member: 40966"><p>When you shoot a bullet at high velocity it attains a certain centrifugal velocity. As the bullet slows down, the rotational velocity doesn't slow down near as much as the linear velocity. A fast spinning bullet is much more stable than an slow spinning bullet.</p><p></p><p>As an example: a bullet fired at 3000 fps muzzle velocity in a 1:8" twist barrel with have a rotational velocity of roughly 270,000 RPM. When it slows to 2000 fps the rotational velocity is still quite high- probably around 240,000-250,000 RPM.</p><p></p><p>The same bullet fired at 2000 fps to approximate a long range velocity will only attain 180,000 fps.</p><p></p><p>The resulting tests are hindered by the less stable bullet and the results are probably not typical of what the real long range shot would be like.</p><p></p><p>You can certainly extrapolate to some degree but to say that the bullet will tumble etc is not a fair test.</p><p></p><p>Ideally, you need to shoot the media at distance.</p></blockquote><p></p>
[QUOTE="dennisinaz, post: 1676983, member: 40966"] When you shoot a bullet at high velocity it attains a certain centrifugal velocity. As the bullet slows down, the rotational velocity doesn't slow down near as much as the linear velocity. A fast spinning bullet is much more stable than an slow spinning bullet. As an example: a bullet fired at 3000 fps muzzle velocity in a 1:8" twist barrel with have a rotational velocity of roughly 270,000 RPM. When it slows to 2000 fps the rotational velocity is still quite high- probably around 240,000-250,000 RPM. The same bullet fired at 2000 fps to approximate a long range velocity will only attain 180,000 fps. The resulting tests are hindered by the less stable bullet and the results are probably not typical of what the real long range shot would be like. You can certainly extrapolate to some degree but to say that the bullet will tumble etc is not a fair test. Ideally, you need to shoot the media at distance. [/QUOTE]
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