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Rifles, Reloading, Optics, Equipment
Gunsmithing
280 Ackley Chamber
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<blockquote data-quote="shortgrass" data-source="post: 2095851" data-attributes="member: 24284"><p>Current Nosler and Federal .280AI is manufactured to SAAMI specs, so I'd head space the chamber to current SAAMI specs if that is what you want to shoot. The traditional .280AI reamer will work for this, just make sure the person doing the chambering uses head space gauges made to the current SAAMI specs. I have a .280AI that I built on a Rem 700 LA. I used the new, SAAMI spec reamer and gauges and set the head space at "GO" + .002". I have a bunch of Winchester head stamp .280 Remington brass, so I am fire forming that to my SAAMI chamber. The Win brass doesn't "crush" in the SAAMI chamber, so I am seating the bullet long, into the rifling, and that keeps the base of the cartridge against the bolt face. That is what you want, as it forces the case to stretch to the chamber at the shoulder instead of creating a bulge at the head. With all the variation in lengths of factory loaded ammo these days, I'd not count on being able to fire form factory in my AI chamber. Confused more, now?</p></blockquote><p></p>
[QUOTE="shortgrass, post: 2095851, member: 24284"] Current Nosler and Federal .280AI is manufactured to SAAMI specs, so I'd head space the chamber to current SAAMI specs if that is what you want to shoot. The traditional .280AI reamer will work for this, just make sure the person doing the chambering uses head space gauges made to the current SAAMI specs. I have a .280AI that I built on a Rem 700 LA. I used the new, SAAMI spec reamer and gauges and set the head space at "GO" + .002". I have a bunch of Winchester head stamp .280 Remington brass, so I am fire forming that to my SAAMI chamber. The Win brass doesn't "crush" in the SAAMI chamber, so I am seating the bullet long, into the rifling, and that keeps the base of the cartridge against the bolt face. That is what you want, as it forces the case to stretch to the chamber at the shoulder instead of creating a bulge at the head. With all the variation in lengths of factory loaded ammo these days, I'd not count on being able to fire form factory in my AI chamber. Confused more, now? [/QUOTE]
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280 Ackley Chamber
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