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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280AI won't chamber
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<blockquote data-quote="shortgrass" data-source="post: 1898558" data-attributes="member: 24284"><p>Most reloading manuals suggest you trim 0.010" shorter than the length shown in the manual. My Fifth Addition Sierra reloading manual shows cartridge length of 2.525 as does the SAAMI drawing. The Sierra manual was printed long before Nosler got to standardize their version, So, both the "old, traditional" and the Nosler (SAAMI) cartridges use the same cartridge length. Cartridge case length is of the utmost importance in any reloading operation, Ackley or a standard cartridge. Too long might collapse the shoulder and it will jam the brass into the end of the chamber, which will cause high pressures. Reloading any Ackley is the same as reloading any rimless rifle cartridge. New brass should be sized to round-out any irregularities in the brass. Even if the case is within its length, it should be trimmed to square-up the case mouth. De-burr, as you have discovered, before loading. After firing, re-size and check for case length and trim if needed. Re-size no more than is needed for easy chambering. De-burr and tumble before reloading. I never "touch the lands" with the bullet when reloading any hunting cartridge, and I only crimp if needed. If I do crimp, I do it in another operation not while seating.</p></blockquote><p></p>
[QUOTE="shortgrass, post: 1898558, member: 24284"] Most reloading manuals suggest you trim 0.010" shorter than the length shown in the manual. My Fifth Addition Sierra reloading manual shows cartridge length of 2.525 as does the SAAMI drawing. The Sierra manual was printed long before Nosler got to standardize their version, So, both the "old, traditional" and the Nosler (SAAMI) cartridges use the same cartridge length. Cartridge case length is of the utmost importance in any reloading operation, Ackley or a standard cartridge. Too long might collapse the shoulder and it will jam the brass into the end of the chamber, which will cause high pressures. Reloading any Ackley is the same as reloading any rimless rifle cartridge. New brass should be sized to round-out any irregularities in the brass. Even if the case is within its length, it should be trimmed to square-up the case mouth. De-burr, as you have discovered, before loading. After firing, re-size and check for case length and trim if needed. Re-size no more than is needed for easy chambering. De-burr and tumble before reloading. I never "touch the lands" with the bullet when reloading any hunting cartridge, and I only crimp if needed. If I do crimp, I do it in another operation not while seating. [/QUOTE]
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280AI won't chamber
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