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280 Ackley Improved - SAAMI Dimensions

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The Lee 280 Ackley Improved die set we offer should not be used to size cases for rifles chambered for the SAAMI 280 Ackley Improved. Cases sized in a Lee die may not fit in a rifle chambered for the SAAMI 280 Ackley Improved. A custom Full Length Sizing Die would have to be made to work for the SAAMI cases. Please contact us for more information regarding this service.

The standard Collet Die Set for the 7mm Express/280 Rem/280 AI should work. Most Ackley Improved cartridges have less body taper, and a steeper shoulder angle, but the distance from the base of the case to the neck/shoulder intersection is not changed. The original 280 Ackley has a neck intersection distance of 2.188" and the SAAMI has a distance of 2.1795" so there is enough clearance in the collet to accommodate the SAAMI cartridge.

The standard Factory Crimp Die for the 7mm Express/280 Rem/280 AI also has enough crimping surface space for the shorter SAAMI cases.

A Quick Trim Die would need to be custom made. The cost would be $27.00 plus any applicable taxes and Shipping/Handling. Current lead time is around 8 weeks. Please use the attached form to fill out the dimensions needed to make the die, and contact us for a link to place an order.

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