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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Full Length or Neck Only; What's Best Resizing for Accuracy?
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<blockquote data-quote="Bart B" data-source="post: 1811853" data-attributes="member: 5302"><p>A 223 barrel should last 10,000 rounds? Yes, if using military service rifle standards. About 3000 using Sierra Bullets' standards, 1/4 MOA average opening up to 3/8 MOA. So says my formula based on 22 caliber bore capacity charge weights. </p><p></p><p>Bore capacity equals 1 grain of powder for each square millimeter of bore cross section area. 24 grains for 223 Rem. Increase charge 41% in larger case, barrel life is cut in half. Increase 100% doubling the charge, one fourth the life.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1811853, member: 5302"] A 223 barrel should last 10,000 rounds? Yes, if using military service rifle standards. About 3000 using Sierra Bullets' standards, 1/4 MOA average opening up to 3/8 MOA. So says my formula based on 22 caliber bore capacity charge weights. Bore capacity equals 1 grain of powder for each square millimeter of bore cross section area. 24 grains for 223 Rem. Increase charge 41% in larger case, barrel life is cut in half. Increase 100% doubling the charge, one fourth the life. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Full Length or Neck Only; What's Best Resizing for Accuracy?
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