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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist rate vs velocity
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<blockquote data-quote="3006savage" data-source="post: 283665" data-attributes="member: 12069"><p>It does not seem based on all the responses like velocity is a consideration if one is on the fence trying to decide between two twist rates.</p><p> </p><p>I would think if the same reamer is used on several identical barrels (minus the twist rates) many of the variables at play could be eliminated/minimized. These barrels could be tested with several different loads made with indentical loading procedures. Pressures and velocities could be recorded to determine their relative performance. </p><p> </p><p>I wondered also if one would find that on average max charges may increase with the slower twist rates while pressures remain equal to the faster twist barrel. It would be fun to test but I sure would not want to foot the bill for that much testing.</p><p> </p><p>My thoughts on twist and velocity were not really the torque losses on the bullet but the additional bearing surface created by faster twist rates and possibly more importantly the angle of the rifing impeding the forward motion of the bullet. In theory At some point the rifling would stop the bullet completly since the friction created by the rifling would block any movement kind of like a threaded bolt.</p><p> </p><p>I am <strong>not</strong> trying to be arguementative and will accept the experiece of others that velocity is not affected by twist rate. I just wanted to put my thoughts out there I guess.</p></blockquote><p></p>
[QUOTE="3006savage, post: 283665, member: 12069"] It does not seem based on all the responses like velocity is a consideration if one is on the fence trying to decide between two twist rates. I would think if the same reamer is used on several identical barrels (minus the twist rates) many of the variables at play could be eliminated/minimized. These barrels could be tested with several different loads made with indentical loading procedures. Pressures and velocities could be recorded to determine their relative performance. I wondered also if one would find that on average max charges may increase with the slower twist rates while pressures remain equal to the faster twist barrel. It would be fun to test but I sure would not want to foot the bill for that much testing. My thoughts on twist and velocity were not really the torque losses on the bullet but the additional bearing surface created by faster twist rates and possibly more importantly the angle of the rifing impeding the forward motion of the bullet. In theory At some point the rifling would stop the bullet completly since the friction created by the rifling would block any movement kind of like a threaded bolt. I am [B]not[/B] trying to be arguementative and will accept the experiece of others that velocity is not affected by twist rate. I just wanted to put my thoughts out there I guess. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist rate vs velocity
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