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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280AI won't chamber
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<blockquote data-quote="Alibiiv" data-source="post: 1897992" data-attributes="member: 69192"><p>Curious to know what reamer your gunsmith has and what used to chamber the rifle. There's the Nosler ".280 Ackley Improved" (SAAMI) version, then there's the <u><em>original Ackley Improved version</em></u> of the cartridge. It will be important to find out which .280 Ackley Improved that the rifle is chambered in; SAAMI or original. The original .280 Ackley Improved used the parent case of .280 Remington @ a case length of 2.540 thousandths. The Nosler (SAAMI) .280 Ackley Improved cartridge that is being produced has a case length of 2.525 thousandths of an inch; a .015 thousandths of an inch difference in length. If you are using the<em><u> original .280 Ackley Improved dies</u></em> in the <em><u>SAAMI</u></em> chamber the brass is .015 thousandths longer and jamming the shoulder back.<em><u> Or you could have the incorrect dies for the chamber in your rifle;</u></em><strong> <em><u>what are you using for dies?</u></em></strong>. The dies have to match the chamber of the rifle or.....you will go crazy trying to figure out what is going on with the fire firefoming for this rifle. I suspect that this is confusing, thank Nolser for this mess!! A year or so back I was going to build a .280 Ackley Improved until I ran into this confusion, built a .270 Ackely instead.</p></blockquote><p></p>
[QUOTE="Alibiiv, post: 1897992, member: 69192"] Curious to know what reamer your gunsmith has and what used to chamber the rifle. There's the Nosler ".280 Ackley Improved" (SAAMI) version, then there's the [U][I]original Ackley Improved version[/I][/U] of the cartridge. It will be important to find out which .280 Ackley Improved that the rifle is chambered in; SAAMI or original. The original .280 Ackley Improved used the parent case of .280 Remington @ a case length of 2.540 thousandths. The Nosler (SAAMI) .280 Ackley Improved cartridge that is being produced has a case length of 2.525 thousandths of an inch; a .015 thousandths of an inch difference in length. If you are using the[I][U] original .280 Ackley Improved dies[/U][/I] in the [I][U]SAAMI[/U][/I] chamber the brass is .015 thousandths longer and jamming the shoulder back.[I][U] Or you could have the incorrect dies for the chamber in your rifle;[/U][/I][B] [I][U]what are you using for dies?[/U][/I][/B]. The dies have to match the chamber of the rifle or.....you will go crazy trying to figure out what is going on with the fire firefoming for this rifle. I suspect that this is confusing, thank Nolser for this mess!! A year or so back I was going to build a .280 Ackley Improved until I ran into this confusion, built a .270 Ackely instead. [/QUOTE]
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280AI won't chamber
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