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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Copper vs lead
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<blockquote data-quote="StumpGrinder" data-source="post: 2020943" data-attributes="member: 114832"><p>Bbullets that are designed to expand seldom tumble unless they have lost enough velocity to not perform as designed. Then they act like a Spitzer and will tumble. You can see this in videos where they are using pistol length weapons of rifle caliber and the round is not developing its designed velocity. Which mimics a long range hit. As all bullets shed velocity if they remain in flight long enough they will become unstable and yaw. It simply happens faster when it impacts tissue. This is the purpose of the twist rate, to keep a projectile stable longer but there are limits. The bullet expanding shortens it and therefore reduces the effects of yaw. Short bullets do not yaw as quickly as long pointy bullets. With a long pointed bullet the base is heaver and therefore will try to flip the bullet just like an arrow without feathers. The feathers on an arrow slow down the rear of the arrow to keep it flying straight. Bullet spin accomplishes this with gyroscopic force, but just like as a top becomes unstable as it slows down so does a bullet.</p></blockquote><p></p>
[QUOTE="StumpGrinder, post: 2020943, member: 114832"] Bbullets that are designed to expand seldom tumble unless they have lost enough velocity to not perform as designed. Then they act like a Spitzer and will tumble. You can see this in videos where they are using pistol length weapons of rifle caliber and the round is not developing its designed velocity. Which mimics a long range hit. As all bullets shed velocity if they remain in flight long enough they will become unstable and yaw. It simply happens faster when it impacts tissue. This is the purpose of the twist rate, to keep a projectile stable longer but there are limits. The bullet expanding shortens it and therefore reduces the effects of yaw. Short bullets do not yaw as quickly as long pointy bullets. With a long pointed bullet the base is heaver and therefore will try to flip the bullet just like an arrow without feathers. The feathers on an arrow slow down the rear of the arrow to keep it flying straight. Bullet spin accomplishes this with gyroscopic force, but just like as a top becomes unstable as it slows down so does a bullet. [/QUOTE]
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Copper vs lead
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