Sig Sauer Newly Developed Hybrid Cartridges Announced at 2018 AUSA Meeting

2018 AUSA (Association of the United States Army) Annual Meeting, Sig Sauer shows new weapon systems and all metal, 20% lighter rifle/mg caliber cartridges:

SIG Sauer also displayed their new hybrid ammunition, a three-piece metallic, not polymer design, with a brass body and what appears to be an alloy base. Solider Systems report that this new ammunition offers a 20% reduction in weight – this was a stipulation of the 2017 SOCOM Medium Machine Gun solicitation. The hybrid ammunition was displayed in a number of calibres including .338 Norma Magnum and 6.5mm.

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Brian, is the depicted round a 6.5mm now? The text mentions a 6.8mm so I am not sure if this sticker means something else maybe.

“Alloy”… what a ridiculous word in gun reporting. Alloy slide, alloy frame, alloy bolt, alloy case head… what alloys?!

Besides - can a case head in e.g. 7075 aluminium really make up an entire 20% reduction in weight compared to brass?



It is a bit confusing as SOCOM (Special Operations Command) recently adopted the 6.5 Creedmoor as a sniper round: NDIA’s Annual Armaments Conference, SOCOM Ammunition "News" Includes adoption of 6.5mm Creedmoor as a Sniper Round, .338 Norma Mag. MG, 9mm Speer Gold Dot etc

But the “regular” U.S Army wants a 6.8mm round: U.S. Army Seriously Considering the Adoption of a 6.8mm cartridge

Plus SOCOM wants a MG in .338 Norma Mag. and lighter weight cartridge cases are now in demand. So who knows what is going to happen.


6.5mm Creedmor?
Not enough other readily avilable calibers to choose from?

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6,5 Creedmoor is a meme by this point. US shooters seem to ignore the fact that the 6,5x55 has been readily available with an enormous amount of load data to choose from for over 100 years already.

But, then again, in the current US gun industry, ALL cartridges have to fit either AR10 or AR15 magazines, or in the case of handguns, use Glock magazines.

In my eyes a tragedy… no room for anything else.


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I wonder how exactly they managed to avoid infringing on the patents from Shell Shock Technologies, or if they are somehow licensing their patent or something? Similar 2-part cartridge case.