SAAMI or the Sporting Arms and Ammunition Manufacturers’ Institute, have just announced that three new magnum cartridges have been accepted for SAAMI standardization. The newly accepted rounds include SIG Sauer’s 277 SIG FURY (the commercially available version of SIG Sauer’s Next Generation Squad Weapon program round), the 6.5 Weatherby Rebated Precision Magnum from Weatherby and the 6.8 Western from Olin Winchester.

277 SIG Fury cartridge spec (SAAMI)

If you’re unfamiliar with SAAMI’s work they are an association of the nation’s leading firearms, ammunition and component manufacturers. Founded in 1926, SAAMI is tasked with coordinating technical data, promoting safe practices in manufacturing and firearms use and creating and publishing industry standards for safety, interchangeability, reliability and quality. In other recent SAAMI news, Texas-based hybrid ammunition manufacturer True Velocity joined the Institute’s board of directors as a voting member and the institution also announced that they will be adding a new membership category – affiliated members.

6.5 Weatherby Rebated Precision Magnum cartridge spec (SAAMI)

Previously, back in March of this year, SAAMI accepted the new 6mm Advanced Rifle Cartridge (6mm ARC) round to their list of standardized rounds. Check out Hrachya’s article on that here.

6.8 Western cartridge spec (SAAMI)

Here’s SAAMI’s announcement about the new rounds:

NEWTOWN, Conn. – The Sporting Arms and Ammunition Manufacturers’ Institute,® Inc., (SAAMI®), the organization at the forefront of promoting firearm safety by creating standards that ensure safety, reliability and interchangeability of firearms, ammunition and components, announced the acceptance of new rife cartridges for SAAMI standardization.

Developed by SIG SAUER, the 277 SIG FURY was introduced with a maximum average pressure of 80,000 psi, with a 135-grain bullet traveling at a velocity of 3,000 fps.

Developed by Weatherby, the 6.5 Weatherby Rebated Precision Magnum was introduced with a maximum average pressure of 65,000 psi, with a 140-grain bullet traveling at a velocity of 3,075 fps.

Developed by Olin Winchester, the 6.8 Western was introduced with a maximum average pressure of 65,000 psi, with a 175-grain bullet traveling at a velocity of 2,840 fps.

For additional information on these new cartridge designs and other recently accepted cartridge and chamber designs, visit

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