6.8 / 10 Warhistory... May 2026

: 7.0mm (.277 in), the same diameter used in the .270 Winchester.

: Developed in the early 2000s, the cartridge was based on the .30 Remington case, necked down to accept a .277-inch bullet. 6.8 / 10 WarHistory...

: Soldiers felt the standard 5.56 NATO round lacked "stopping power" and range, especially when fired from short-barreled carbines like the M4. : 7.0mm (.277 in)

Below is a guide to the development and history of the 6.8mm SPC, often rated for its effectiveness in mid-range combat scenarios. 6.8 / 10 WarHistory...

: It delivers approximately 44% more energy than the 5.56mm NATO at ranges of 100–300 meters.