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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Highest BC bullet for a 30-378??
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<blockquote data-quote="MontanaRifleman" data-source="post: 787566" data-attributes="member: 11717"><p>You will probably do OK with the 10 twist especially out of a 30-378. But IMO, a 9 twist would be better, especially if you are at lower elevations. When I input the numbers for a RUM into the Berger twist calc for my worst case of 3000 fps, 3000' elevation and 0* temp with a 10 twist, it comes up with a SF of 1.39 and Berger recommends a 1.5 which is standard for hunting rounds. A 1.1 or better is usually good for paper punching but less than 1.5 can lead to unstable terminal ballistics.</p><p></p><p>I have read that Tim North from Broughton Barrels is recommending the 9 twist for the 230 Hybrid either from personal experience or customer experience.</p><p></p><p><a href="http://www.bergerbullets.com/products/target-bullets/" target="_blank">http://www.bergerbullets.com/products/target-bullets/</a></p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 787566, member: 11717"] You will probably do OK with the 10 twist especially out of a 30-378. But IMO, a 9 twist would be better, especially if you are at lower elevations. When I input the numbers for a RUM into the Berger twist calc for my worst case of 3000 fps, 3000' elevation and 0* temp with a 10 twist, it comes up with a SF of 1.39 and Berger recommends a 1.5 which is standard for hunting rounds. A 1.1 or better is usually good for paper punching but less than 1.5 can lead to unstable terminal ballistics. I have read that Tim North from Broughton Barrels is recommending the 9 twist for the 230 Hybrid either from personal experience or customer experience. [url]http://www.bergerbullets.com/products/target-bullets/[/url] [/QUOTE]
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Highest BC bullet for a 30-378??
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