Sig Hybrid Ammo - SIG Sauer has released their 2020 catalog and there are a lot of new products to be excited about, but one thing that jumped out at me was the introduction of a new cartridge - the 277 SIG Fury. The new round developed by SIG Sauer is the result of their work on the US Army's 6.8mm Next Generation Squad Weapon (NGSW) program.
I got my first look at SIG's new hybrid case weapon last September at DSEI 2019 - check out my full post on SIG's NGSW prototype and their weapon. Ron Cohen, SIG Sauer CEO at DSEI, took the time to explain the new bullet to me, feeling that its hybrid approach with a steel and forged brass case offers the most practical future.
Sig Hybrid Ammo
277 may not have the same fury as the 6.8×51mm SIG is developing for the US Army, but the same sources and future caliber will use hybrid case technology, with 6.5 Creedmoor and 7.62 x51mm being designed at DSEI.
Cartridge Of The Week: The .277 Sig Fury
SIG Sauer describes the 277 Fury as a 'warner' and 'the next generation of ammunition'. Catalog Tuts has reduced bullets and increased energy on target.
The catalog shows two graphs showing the superior performance of SIG Fury No. 6.5 Creedmoor 6-9 feet less drop at 1000 yards and up to 25% more power at 1000 yards.
The catalog features the new round in both Elite Match Grade and Elite Hunter Tipped form with 135 and 140gr projectors respectively.
Currently, the only rifle for the new round is the new SIG Sauer CROSS precision hunting bolt action. Below is a CROSS rifle page from the new catalog.
Read Sig Cross Prs Online
Matt is a British historian specializing in small arms development and military history. He has written several books and articles for various publications in the US and the UK. He also runs Historical Firearms, a blog that explores the history, development and use of firearms. Matt is the co-founder of The Armourer's Bench, a video series on historically significant small arms. Sig Sauer's new hybrid weapon is born out of NGSW development and parallel DoD requirements to make a weapon simpler. By mixing materials and placing them where they are most needed, Sig has developed a very simple solution to many problems. Three, to be exact.
One of the requirements in the NGSW, and one of the requests and goals from the Department of Defense, was to lighten the weapon by 20% over legacy brass systems. Other companies have taken up this challenge and made significant changes to the material content to achieve this.
Sig, quite simply, used only a small amount of brass. The complex geometry of a solid brass case requires the "standard" thickness of pistol and rifle brass. Forming the cylindrical/conical part of the case from brass creates a thin wall on the alloy. A thin wall equals less weight. The mat itself does not have a thickness requirement for strength, it is supported by the weight of the steel chamber wall. The case wall material (brass) will be good as long as it is not damaged in the room.
The part of the case that can be damaged during firing is the base. The edge, with the extractor bending over it and tearing out of the casing, is exposed to dynamic forces.
Sig Sauer Ht Elite Performance Hunting 6.5 Creedmoor Ammunition 20 Rounds 120 Grain Solid Copper Expanding 2825fps
A wide piece of stainless steel base is joined to a brass case wall and sealed with an aluminum washer.
Brass can sometimes crack under these stresses. Stainless steel was chosen by Sig to greatly reduce that chance. The copper wall still offers the advantages of the hybrid in thermal and tensile stress. The stainless provides a stable base that the extractor pulls around. The washer in it seals the two together, which is a seal that strengthens under pressure.
To do this, the US Army chose the 6.8mm round with a better ballistic profile than the 5.56 and 7.62. It would fly better than either, with a mass of mathematically efficient armored troops. We're basically going back to the combat rifle concept but moving forward with real patience and listening to people who know what they're talking about.
Enter again a simple practical solution to this problem. Thinner brass walls give the powder more internal capacity behind a lighter, narrower projectile that flies better. Choose powder optimized for short barrels (13 inches) and produce the range and power you need.
The Future Of Soldier's Ammunition
With that blank sheet of paper, NGSW's request gave them freedom of movement. They weren't limited to 5.56, so they created simple solutions to solve simple problems (if they weren't limited by class boundaries). They worked with widely available and proven hardware in 7.62×51 dimensions and a successful operating system by MCCC.
This rifle is going to feel and perform like an M4, which I can't put a price on because it is a world class service weapon.
Sig Hybrid ammo is a very simple solution that allows us to play with rounds in a new weight and velocity category. Can NGSW help them win? we will see. The USMC built the .50 BMG as most cases, but the .50 has always been a different animal. Will we see a similar form with a polymer case wall? Again, maybe.
The brilliance with the complete NGSW SIG solution is working in new ways with familiar dimensions, all because several key limitations have been removed.
What Do The Ammo Nerds In This Group Think Of The New .277 Fury Rounds?
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