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Fast rate of twist?
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<blockquote data-quote="Coyote Shadow Tracker" data-source="post: 2791208" data-attributes="member: 116439"><p>You will probably have others with much more knowledge than me on Ballistics. Some might say the bullet spinning faster will make the bullet expand more upon hitting tissue. If you look at physics a bullet traveling at 3,000 fps with a twist rate of 1:8 will have the bullet spinning at 135,000 rpm.<em><strong> (correction 270,000 rpm missed by 2x value</strong></em>).When the bullet enters the animal going 3,000fps it will take approximately 1/3000 of a second to go through 1' of the animal. Now it is going to be slowed down by body tissue and even stopped. If the bullet was not stopped or slowed by the animals body tissue it would spin 2,250 (correction 4,500) times per second in that 1' going through the animal.</p><p>I would say that the bullet "Mass" x "Velocity" equals the "Energy" of the bullet hitting the animal and that the "Spin" of the bullet has little to do.</p><p>My calculations may be off, but wanted to break down in simplest form to understand Mass and Velocity being the main part of Energy and showing twist rate and how fast everything happens when a bullet leaves the barrel and then hits an object.</p><p></p><p>EDIT</p><p>I was off on my calculation for RPM. I should not Post before going to bed and start using a calculator instead of just doing in my head.</p><p><strong>The formula to calculate a bullet's RPM is equal to Muzzle Velocity (fps) x 12 inches x 60 seconds / Twist Rate (inches). </strong></p></blockquote><p></p>
[QUOTE="Coyote Shadow Tracker, post: 2791208, member: 116439"] You will probably have others with much more knowledge than me on Ballistics. Some might say the bullet spinning faster will make the bullet expand more upon hitting tissue. If you look at physics a bullet traveling at 3,000 fps with a twist rate of 1:8 will have the bullet spinning at 135,000 rpm.[I][B] (correction 270,000 rpm missed by 2x value[/B][/I]).When the bullet enters the animal going 3,000fps it will take approximately 1/3000 of a second to go through 1' of the animal. Now it is going to be slowed down by body tissue and even stopped. If the bullet was not stopped or slowed by the animals body tissue it would spin 2,250 (correction 4,500) times per second in that 1' going through the animal. I would say that the bullet "Mass" x "Velocity" equals the "Energy" of the bullet hitting the animal and that the "Spin" of the bullet has little to do. My calculations may be off, but wanted to break down in simplest form to understand Mass and Velocity being the main part of Energy and showing twist rate and how fast everything happens when a bullet leaves the barrel and then hits an object. EDIT I was off on my calculation for RPM. I should not Post before going to bed and start using a calculator instead of just doing in my head. [B]The formula to calculate a bullet's RPM is equal to Muzzle Velocity (fps) x 12 inches x 60 seconds / Twist Rate (inches). [/B] [/QUOTE]
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