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Rifles, Reloading, Optics, Equipment
Reloading
Fireforming .280 AI from .280 Remington brass or .270 Win brass?
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<blockquote data-quote="J E Custom" data-source="post: 1531143" data-attributes="member: 2736"><p>I recommend chambering the AI the way P O Ackley did and not having any issues with fire forming.</p><p></p><p>There are two distinct different AI chambers now days.</p><p>The Ackley way and the new SAMMI chamber. If you don't reload or don't want to fire form, I recommend using the new SAMMI head space gauge and reamer and buy the preformed brass.</p><p></p><p>If you want to shoot all other brands of loaded 280 ammo and /or brass, I recommend using the 280 rem head space gauge and chambering .004 thousandths short (No head space). this allows you to chamber factory 280 ammo/brass without any bullet seating tricks, and gives you great accuracy while you are fire forming.</p><p></p><p>Most people with rifles set up this way get hunting accuracy while shooting the un fire formed cases. It also allows you to shoot any brand of 280 ammo or cases except the Nosler. Some say you can fire the Nosler in an non SAMMI AI chamber(The dimensions of a true Ackley chamber), but I don't recommend it because of the fit in the chamber (Case head separation is a distinct possibility as MUD said).</p><p></p><p>Set up the way Ackley recommends, standard 280 loads can be use to fire form with no issues because the case is held in place with .004 compression and does not allow it to move. It also reduces the case growth to .004 to .006 thousandths in the fire forming stage.</p><p></p><p>Just my recommendation</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1531143, member: 2736"] I recommend chambering the AI the way P O Ackley did and not having any issues with fire forming. There are two distinct different AI chambers now days. The Ackley way and the new SAMMI chamber. If you don't reload or don't want to fire form, I recommend using the new SAMMI head space gauge and reamer and buy the preformed brass. If you want to shoot all other brands of loaded 280 ammo and /or brass, I recommend using the 280 rem head space gauge and chambering .004 thousandths short (No head space). this allows you to chamber factory 280 ammo/brass without any bullet seating tricks, and gives you great accuracy while you are fire forming. Most people with rifles set up this way get hunting accuracy while shooting the un fire formed cases. It also allows you to shoot any brand of 280 ammo or cases except the Nosler. Some say you can fire the Nosler in an non SAMMI AI chamber(The dimensions of a true Ackley chamber), but I don't recommend it because of the fit in the chamber (Case head separation is a distinct possibility as MUD said). Set up the way Ackley recommends, standard 280 loads can be use to fire form with no issues because the case is held in place with .004 compression and does not allow it to move. It also reduces the case growth to .004 to .006 thousandths in the fire forming stage. Just my recommendation J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Fireforming .280 AI from .280 Remington brass or .270 Win brass?
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