The .277 Fury or 6.8x51mm Common Cartridge is a centerfire rimless bottlenecked rifle cartridge announced by SIG Sauer in late 2019. It has been designed to fit into short action lengths and barrels, making it an ideal choice for mountain hunters. This new cartridge has the potential to be the next great hunting cartridge, with decreased bullet drop and increased energy on target compared to standard ammunition in similar calibers. In April 2022, the US Army announced that they had selected SIG Sauer's XM5 rifle and .277 Fury ammunition to partially replace the M4. This marks a major shift for the military, as this is the first time since 1964 that they have adopted a new caliber for their rifles. The .277 Fury is 51mm long and cannot fit in a normal AR-15/M4/M16 platform, so it requires its own dedicated rifle platform. The .277 Fury offers several advantages over other cartridges such as improved accuracy, better ballistics performance, and increased terminal performance on target. It also has less recoil than other cartridges of similar size due to its lighter bullet weight and higher velocity. Additionally, it has a flatter trajectory than other cartridges which makes it easier for shooters to hit targets at longer distances.IMPORTANT: This ‘Commercial’ variant operates with standard cases and a lower max pressure compared to the standard military version.
Caliber Statistics
Standard / Datasheet
Primer Size
Large Rifle (LR)
Max. Case Length
54 Grains of Water
Bullet / Barrel Diameter
0.277'' | 7.04 mm
Max. Case Length
2.015'' | 51.18 mm
Max. Cartridge Length / OAL
2.7'' | 68.58 mm
Max. Standardized Pressure:
63092 psi | 4350 bar
XXL ID
CID_1351
- Bullet Weight (gr) ->0-5050-7575-100100-150150-200200-300>300Accurate 2520👍👍👍ADI AR 2206H👍Alliant Reloder-15👍👍Alliant Reloder-17👍👍Baschieri & Pellagri 107👍👍Hodgdon BL-C2👍Hodgdon CFE223👍👍👍Hodgdon H322👍👍Hodgdon H335👍👍IMR 4895👍👍Lovex D073.6👍Norma 203B👍👍Ramshot Big Game👍👍Ramshot Wild Boar👍ReloadSwiss RS 52👍👍ReloadSwiss RS 60👍👍Shooters World Match Rifle👍SNPE Vectan SP 11👍👍Winchester 748👍👍Winchester StaBALL Match👍
The following table indicates for this caliber and various bullet weight ranges (in grains) which powders are suitable (👍) and popular among our reloading community (👍👍). This might evolve over time as more community members share their loads and as we accumulate more calculations and tests with our balistics calculator.
Weight vs. Velocity - Suitable Bullets for this Caliber
You need to get an access license to view this chart. See an example with the following caliber: .22 Nosler
Barrel Length Variation vs. Velocity - by Bullet Weight
.277 Fury (Commercial) load data available is with the following bullets:
(most popular first)