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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280AI with too much head space...options?
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<blockquote data-quote="lancetkenyon" data-source="post: 1924159" data-attributes="member: 68875"><p>Like others have stated, the original Ackley version of the .280AI (.280 AI 40* or .280 Rem Improved 40*) is different than the SAAMI Nosler version of the .280AI. </p><p></p><p>Headspace in the SAAMI .280AI (by Nosler) is shorter than the original .280 AI 40* by PO Ackley. </p><p></p><p>If the gunsmith has an older .280AI reamer (to PO Ackley spec), the headspace guage of the new SAAMI .280AI will not work correctly. </p><p></p><p>If you have a way to measure your actual fired case from base to shoulder datum with a .420" comparator, or know someone who can, post that measurement. I would not be surprised if you have the original wildcat PO Ackley chamber rather than the SAAMI version reamer. That would clear the gunsmith from any wrong chambering job. You would just have to order the correct dies (and g0/no go gauges).</p><p></p><p>You could jam the bullets into the lands for your fire forming loads to keep the case head tight against the bolt face to eliminate failure to fire issues. Just make sure you don't have a max load.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 1924159, member: 68875"] Like others have stated, the original Ackley version of the .280AI (.280 AI 40* or .280 Rem Improved 40*) is different than the SAAMI Nosler version of the .280AI. Headspace in the SAAMI .280AI (by Nosler) is shorter than the original .280 AI 40* by PO Ackley. If the gunsmith has an older .280AI reamer (to PO Ackley spec), the headspace guage of the new SAAMI .280AI will not work correctly. If you have a way to measure your actual fired case from base to shoulder datum with a .420" comparator, or know someone who can, post that measurement. I would not be surprised if you have the original wildcat PO Ackley chamber rather than the SAAMI version reamer. That would clear the gunsmith from any wrong chambering job. You would just have to order the correct dies (and g0/no go gauges). You could jam the bullets into the lands for your fire forming loads to keep the case head tight against the bolt face to eliminate failure to fire issues. Just make sure you don't have a max load. [/QUOTE]
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280AI with too much head space...options?
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