SAAMI Announces Acceptance of Three New Cartridges


Sporting Arms and Ammunition Manufacturers Institute (SAAMI) announced on 13 NOV 2020 the acceptance of three new rifle cartridges. These new cartridges are the 277 SIG FURY, 6.5 Weathery Rebated Precision Magnum and 6.8 Western.

Here is the text of the official SAAMI press release:

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

The Sporting Arms and Ammunition Manufacturers’ Institute, founded in 1926 at the request of the federal government, is dedicated to creating and promulgating technical, performance and safety standards for firearms, ammunition and components, and is committed to being the preeminent global resource for the safe and responsible transportation, storage and use of these products.


  1. So, another 6.5mm round that’s going to burn up barrels like toast in less than 1,000 rounds? Cool.

    More work for gunsmiths. I guess I should not make sarcastic remarks… like how this seems like a 6.5-284 in a long action, or something similar.

    As I’ve ranted more than once before, we’ve had all the cartridges we’ll ever need since before WWI. In this case, one wonders what sort of performance you can get out of a 6.5×55 Swede with modern powders (like Re17) and loading to higher-than-1900-era-pressures? Today, we see Nosler bringing out a line of boo-teek cartridges based on (wait for it boys and girls) the .404 Jeffery, which was brought out in 1905, the same year as the 9.3×62 Mauser, both of which are more than enough ooomf for anything in North America, including grizzly bears or moose.

    What I will say about these news rounds is this:

    When the first smokeless powder rounds were put into bolt-action rifles in the 1890’s, chamber pressures (let’s use the modern nomenclature of MAP) were in the high 40K’s – like 47 to 49K PSI.

    When we got to the .30-06, we saw MAP’s in the mid-50K (54 to 56K PSI) range.

    Then when we got to the belted magnum craze of the early 60’s, MAP’s were in the high 50K to low 60K range.

    Now we’re seeing SAAMI specs of MAP in the mid-60K range – 65K PSI.

    I wish to warn people that the brass case+primer setup we’ve been using for 120+ years starts to exhibit failures around th 70K PSI range, depending on the rifle action, headspace, bolt support of case head, particular case/cartridge, etc we’re talking about. These new cartridges are like the evolution from the Mauser 98 to the Remington 700 – more and more safety features were removed as we learned more and more about how to reliably load/construct a nitrocellulose round. Now we’re seeing the safety margin in load pressure taken away.

    Be aware that the combination of these two trends together could result in much sadness down the line. If you’re looking at these modern 65K PSI MAP cartridges in a modern 700-like action, be aware that you’re now in an region of overall system design where it will not reward the inattentive or foolish with a mere scare.

    • Yep. I have a 6.5 Swede in a Mauser 98 action. It’ll go well beyond the tame ballistics for loads developed for the weaker (but beautiful) Mauser 96 action. It’s all the 6.5mm round any man could ever need.

      As with the 277 Fury, this seems like pointless change for the sake of change.

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