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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Headspace conundrum
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<blockquote data-quote="Carey Farmer" data-source="post: 2819698" data-attributes="member: 122715"><p>Every piece of .264 Win Mag and 7mm Rem Mag brass I ever bought (from Nosler, Norma, ADG, or Peterson) was 0.013" to 0.017" short (at the shoulder datum) of the minimum SAAMI chamber dimension</p><p></p><p>Not exactly sure why, but that's how SAAMI set up chamber & cartridge dimensions for those (belted) cartridges: the case is supposed to be .011" to .028" shorter than the chamber at the shoulder datum. Never could figure out why, and it always bothered me, so I had my .264 Win Mag reamer made up with the belt-to-shoulder dimension 0.010" shorter than SAAMI. Problem solved.</p></blockquote><p></p>
[QUOTE="Carey Farmer, post: 2819698, member: 122715"] Every piece of .264 Win Mag and 7mm Rem Mag brass I ever bought (from Nosler, Norma, ADG, or Peterson) was 0.013" to 0.017" short (at the shoulder datum) of the minimum SAAMI chamber dimension Not exactly sure why, but that's how SAAMI set up chamber & cartridge dimensions for those (belted) cartridges: the case is supposed to be .011" to .028" shorter than the chamber at the shoulder datum. Never could figure out why, and it always bothered me, so I had my .264 Win Mag reamer made up with the belt-to-shoulder dimension 0.010" shorter than SAAMI. Problem solved. [/QUOTE]
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Headspace conundrum
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