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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: 1845892" data-attributes="member: 5302"><p>The first thing to believe, know, understand and have confidence in, is the rimless bottleneck case does not rest in the chamber bottom when fired. It's a popular myth that's been around for decades. Sierra Bullets used to claim this and stated it in their early reloading manual. </p><p></p><p>A 2 ounce firing pin pushed by a 25+ pound force moving near 20 fps will drive a 1 ounce rimless bottleneck cartridge a couple thousandths inch forward until it stops against and centered in the chamber shoulder before the primer gets dented and fires the round.</p><p></p><p>Bolt face ejector's do the same thing when the round is chambered.</p><p></p><p>Therefore, case necks must be well centered on the case shoulder.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1845892, member: 5302"] The first thing to believe, know, understand and have confidence in, is the rimless bottleneck case does not rest in the chamber bottom when fired. It's a popular myth that's been around for decades. Sierra Bullets used to claim this and stated it in their early reloading manual. A 2 ounce firing pin pushed by a 25+ pound force moving near 20 fps will drive a 1 ounce rimless bottleneck cartridge a couple thousandths inch forward until it stops against and centered in the chamber shoulder before the primer gets dented and fires the round. Bolt face ejector's do the same thing when the round is chambered. Therefore, case necks must be well centered on the case shoulder. [/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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