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Rifles, Reloading, Optics, Equipment
Reloading
Body sizing? A necessary step?
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<blockquote data-quote="Bart B" data-source="post: 549590" data-attributes="member: 5302"><p>Setting a fired bottleneck case shoulder back a couple thousandths ensures the case neck will be better aligned with it. If the case neck's not aligned with the case shoulder, the case neck won't be centered in the chamber neck when the round fires.</p><p></p><p>Proper full length sizing of fired cases, even belted ones, lets them all headspace on their shoulder. There's typically enough room on belted cases to let them headspace on a SAAMI spec minimum chamber without their belt touching the chamber belt headspace point. Moreso on longer chambers still within SAAMI specs.</p><p></p><p>When the firing pin drives the case forward and hard into the chamber shoulder, that perfectly centers the front of the case in the chamber....if the necks axis is aligned with the shoulder axis.</p></blockquote><p></p>
[QUOTE="Bart B, post: 549590, member: 5302"] Setting a fired bottleneck case shoulder back a couple thousandths ensures the case neck will be better aligned with it. If the case neck's not aligned with the case shoulder, the case neck won't be centered in the chamber neck when the round fires. Proper full length sizing of fired cases, even belted ones, lets them all headspace on their shoulder. There's typically enough room on belted cases to let them headspace on a SAAMI spec minimum chamber without their belt touching the chamber belt headspace point. Moreso on longer chambers still within SAAMI specs. When the firing pin drives the case forward and hard into the chamber shoulder, that perfectly centers the front of the case in the chamber....if the necks axis is aligned with the shoulder axis. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Body sizing? A necessary step?
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