About .277 Sig Fury
Hey all, we here at True Shot Academy are going to talk about
.277 Sig Fury today. The cartridge represents a recent development in the realm of small arms munitions and is relatively new to the commercial market. Currently, the .277 Sig Fury is undergoing evaluation and slow adoption by the U.S. military. Today, we are going to delve into various traits, features, use cases, and other considerations regarding this new cartridge. Without further ado, let’s go over the .277 Sig Fury.
What is the .277 Sig Fury?
The cartridge we know as the
.277 Sig Fury was introduced to the market in 2019 by
Sig Sauer, a well-known firearm and
ammunition producer. This cartridge was designed for by the company as their submission for the U.S. Army’s Next Generation Squad Weapon Program (NGSW). Testing was conducted with the desire to find a potential replacement for the issued M4 carbine and M249 light machine gun. The cartridge is referred to by many names. In the civilian world and in SAAMI nomenclature, the cartridge is designated as the .277 Sig Fury or
.277 Fury for short. Military nomenclature for the cartridge designates the cartridge as the “
6.8 common cartridge.” This is due to the metric designation for the cartridge being
6.8x51mm.
Sig Sauer designed their firearm submission and the .277 Sig Fury cartridge to address concerns regarding the realities of modern combat. Specifically, there were concerns regarding the proliferation of body armor which protected wearers from cartridges like
5.56. The cartridge was also designed to improve upon the performance of 5.56 and
7.62 NATO. Specifically, Sig Sauer sought to produce a cartridge which boasted both an improved effective range and better lethality than the two established NATO cartridges. By April 2022, both the .277 Sig Fury cartridge and XM7 rifle submitted by Sig Sauer were selected by the U.S. military. After this selection, Sig Sauer was granted a 10-year contract to produce the new XM7 rifle and XM250 light machine gun. Currently, slow adoption and testing are taking place within the U.S. military.
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How Does The .277 Sig Fury Compare to Similar Cartridges?
Dimensionally, the cartridge is similar in size to the
7.62 NATO and
.308 Winchester and is a short action cartridge. This makes it viable for use in autoloaders and bolt action firearms alike. Put plainly, a shorter cartridge is more conducive to rapid and reliable cycling than a longer one is. These close dimensions allow for the cartridge to be compatible with large frame firearms and other designs and allow for caliber conversions. Due to this fact, the U.S. Army currently has an ongoing solicitation regarding the acquisition of
.277 Sig Fury conversion kits for M240 machine guns in inventory.
As mentioned above, the cartridge was designed to feature a superior effective range than the
5.56 and
7.62 NATO cartridges. This is possible due to the higher pressures of the cartridge and its light projectiles. When compared to something like the
6.5 Creedmoor,
Sig Sauer claims that their new cartridge exhibits superior performance. Sig Sauer specifically claims that their .277 Sig Fury cartridge features about 6-9 feet less bullet drop at distances of 1,000 yards when compared to 6.5 Creedmoor. Additionally, Sig Sauer also claims their cartridge imparts about 20-25% more energy than the 6.5 Creedmoor.
Unique Hybrid Casings
Due to the high-pressure nature of some loadings, some
.277 Sig Fury loadings feature unique hybrid casings. This design essentially features a three-piece system consisting of a steel case head, brass body, and aluminum locking washer. The purpose of this design is to withstand the 80,000 psi chamber pressure exhibited by high pressure .227 Sig Fury loadings. Notably, hybrid casings are only present on high pressure, specialty loadings. Lower pressure offerings, such as full metal jacket (FMJ) loadings feature standard casings as they do not require reinforced components to handle high pressures.
How Available Are Firearms Chambered in .277 Sig Fury?
At this point in time, there are few offerings available in the
.277 Sig Fury cartridge. This is the reality of many new cartridges as it generally takes time for industry support to manifest. The case is the same for new cartridges such as the
8.6 Blackout.
Sig Sauer is the only company producing complete firearms chambered in .277 Sig Fury at this time. The cartridge was introduced by Sig Sauer in the first place so it is only natural that they provide support for it in the way of firearms.
Sig Sauer offerings in the caliber include their bolt action Sig Cross rifle and their MCX Spear rifle. Other firearm manufacturers may throw their hat into the ring if the round becomes more popular and demand increases. Of course, with the round being adopted and evaluated by the military, it is reasonable to expect an increase in popularity and support over time. All in all, firearm support for the cartridge is small now and time will tell if there is a noticeable increase in popularity and support.
How Available is .277 Sig Fury Ammo?
As with firearms in the caliber, there is little support for
.277 Sig Fury ammo at this time.
Sig Sauer is the only company producing loadings for the caliber at this time. This is due in part to the fact that they developed the cartridge and that it is still relatively new to the market. In fact, SAAMI standardization did not occur until 2020, meaning that established specs were not available until 4 years ago. In time, more companies may begin to produce
.277 Sig Fury ammunition in the future as it grows in popularity.
Sig Sauer currently produces both reduced pressure and high pressure .277 Sig Fury ammo. Reduced pressure loadings feature traditional casings while the high-pressure offerings feature hybrid casings.
Ammo can be had in everything from FMJ loadings to specialized hunting, match, and even lead-free loadings. Due to the niche and new nature of the loading, it may be hard to find locally. Due to this fact, one may opt to
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buy bulk .227 Sig Fury ammo when they can find it.
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What is .277 Sig Fury Good For?
Like all rounds, the
.277 Sig Fury is good for recreational shooting and training. Though, the higher
ammo costs may make range sessions sparse or short at times. Additionally, the supply of ammo may be a logistic hurdle for some. Regardless of this fact, the cartridge will perform admirably when employed in recreational capacities against rubber, steel, or cardboard targets. Of course, the cartridge’s adoption by the U.S. military proves that the .277 Sig Fury has value as a martial cartridge. This is to say that the cartridge is more than adequate for use in a fighting rifle. The round can also be employed by hunters for dispatching medium to large-sized game.
Sig Sauer produces specialized hunting
ammunition for this use case to further optimize its performance in the field.
Conclusion
All in all, the
.277 Sig Fury cartridge represents a recent addition to the market which is worth keeping an eye on. While support is low now, the cartridge’s merits and ongoing adoption and evaluation by the military may aid its popularity and garner further support from the industry. Of course, only time will tell. We here at True Shot Ammo carry
.277 Sig Fury ammunition in addition to our wide variety of
ammo for sale. Our
ammo inventory encompasses popular calibers such as
9mm,
.223,
12 gauge, and
.22 LR to name a few. Whether you want to
buy .277 Sig Fury ammo or want to
buy bulk ammo, we have you covered. As always, happy shooting.
