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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
help on rifling twist
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<blockquote data-quote="lboom" data-source="post: 248984" data-attributes="member: 13237"><p>I necked down a 7mm dakota to 6.5 mm and am getting ready to build up a gun for it, What rifling twist shoul I use if the Max grain bullet is 120. All the formulas talk about bullet length but is it overall length or land bearing length. I would like to be able to shoot 95 grain vmax to 120 grain sierra matchkings. Thanks Larry</p></blockquote><p></p>
[QUOTE="lboom, post: 248984, member: 13237"] I necked down a 7mm dakota to 6.5 mm and am getting ready to build up a gun for it, What rifling twist shoul I use if the Max grain bullet is 120. All the formulas talk about bullet length but is it overall length or land bearing length. I would like to be able to shoot 95 grain vmax to 120 grain sierra matchkings. Thanks Larry [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
help on rifling twist
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