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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Twist rate, how fast is too fast?
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<blockquote data-quote="Lenny Foffa" data-source="post: 2458667" data-attributes="member: 100742"><p>Feenix, <strong>The Berger Twist Rate Calculator </strong> says that the Nosler 150 Grn. ABLR bullet , with a G1 BC of 592 , in 270 Caliber, with a Muzzle velocity of 3000 fps, results in a SG score of 1.69. Just a bit over the 1.5 Base line . Since I have a 26 inch , 10 twist barrel on the Weatherby Mark V , I must live within the limitations of my older rifle. I was very surprised to see the Berger 170 Grn. Bullet, in 270 with a G1 BC of 662 has a SG score of 1.87 at 2800fps. I did not think the older 10 twist would stabilize that very long , heavy bullet. Once again, Thank You.</p></blockquote><p></p>
[QUOTE="Lenny Foffa, post: 2458667, member: 100742"] Feenix, [B]The Berger Twist Rate Calculator [/B] says that the Nosler 150 Grn. ABLR bullet , with a G1 BC of 592 , in 270 Caliber, with a Muzzle velocity of 3000 fps, results in a SG score of 1.69. Just a bit over the 1.5 Base line . Since I have a 26 inch , 10 twist barrel on the Weatherby Mark V , I must live within the limitations of my older rifle. I was very surprised to see the Berger 170 Grn. Bullet, in 270 with a G1 BC of 662 has a SG score of 1.87 at 2800fps. I did not think the older 10 twist would stabilize that very long , heavy bullet. Once again, Thank You. [/QUOTE]
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Twist rate, how fast is too fast?
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