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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1 in 7.5 Twist 257 Weatherby
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<blockquote data-quote="J E Custom" data-source="post: 1989214" data-attributes="member: 2736"><p>I would not recommend twist rate that fast if you want to shoot the lighter bullets at all. The average velocity for the 70 grain is close to 4000 ft/sec. The average velocity for the 100 grain is 3600 ft/sec and the average velocity for the 120's is 3300 ft/sec. so if you want to use both light and heavy bullets I would recommend the 1 in 8.5 to 1 in 9.5 range they will stabilize the 120's and allow the use of lighter bullets. Some of the 70 grain bullets may not survive the RPM at the 257 Weatherby Velocities but good bonded bullets should.</p><p></p><p>Just My recommendation</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1989214, member: 2736"] I would not recommend twist rate that fast if you want to shoot the lighter bullets at all. The average velocity for the 70 grain is close to 4000 ft/sec. The average velocity for the 100 grain is 3600 ft/sec and the average velocity for the 120's is 3300 ft/sec. so if you want to use both light and heavy bullets I would recommend the 1 in 8.5 to 1 in 9.5 range they will stabilize the 120's and allow the use of lighter bullets. Some of the 70 grain bullets may not survive the RPM at the 257 Weatherby Velocities but good bonded bullets should. Just My recommendation J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1 in 7.5 Twist 257 Weatherby
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