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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
High velocity chamberings known for having exceptional accuracy.
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<blockquote data-quote="elkaholic" data-source="post: 921250" data-attributes="member: 13833"><p>One of the problems you are having is bore and groove diameter. For ex: a .308 rifle is bored .300" and then the rifling is cut to a .308" groove. The metric designation is 7.62mm which is .300" (the groove size) .257" and .264" are obviously only .007" difference so sometimes the designations are not exact but rounded somewhat. The BORE diameter of a .264" is .256" which is 6.5 mm. (thence the old .256 Newton) Anyway, Arizonas' advice is good, you will learn a lot by doing some homework. This may generate more questions, but you will learn more in the process. Good luck...........Rich</p></blockquote><p></p>
[QUOTE="elkaholic, post: 921250, member: 13833"] One of the problems you are having is bore and groove diameter. For ex: a .308 rifle is bored .300" and then the rifling is cut to a .308" groove. The metric designation is 7.62mm which is .300" (the groove size) .257" and .264" are obviously only .007" difference so sometimes the designations are not exact but rounded somewhat. The BORE diameter of a .264" is .256" which is 6.5 mm. (thence the old .256 Newton) Anyway, Arizonas' advice is good, you will learn a lot by doing some homework. This may generate more questions, but you will learn more in the process. Good luck...........Rich [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
High velocity chamberings known for having exceptional accuracy.
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