Engineering:8.6 mm Blackout

Short description: Rifle cartridge

8.6mm Blackout
Type	Centerfire rifle
Place of origin	United States
Production history
Designer	Q, LLC
Produced	2022–present
Specifications
Parent case	6.5mm Creedmoor
Case type	Rimless, bottleneck
Bullet diameter	8.585 mm (0.3380 in)
Neck diameter	9.40 mm (0.370 in)
Shoulder diameter	11.531 mm (0.4540 in)
Base diameter	11.946 mm (0.4703 in)
Rim diameter	12.01–0.25 mm (0.4728–0.0098 in)
Rim thickness	1.37–0.25 mm (0.0539–0.0098 in)
Case length	42.80 mm (1.685 in)
Overall length	63.25 mm (2.490 in)
Rifling twist	76–102 mm (1:3–1:4")
Primer type	Small rifle or large rifle (depending on casing)
Ballistic performance
Bullet mass/type Velocity Energy 18.66 g (288 gr) Gorilla Fracturing Subsonic 320 m/s (1,000 ft/s) 955.5 J (704.7 ft⋅lbf)
Test barrel length: 406 mm (16.0 in) Source(s):

8.6 mm Blackout (8.6×43 mm), also sometimes referred to as 8.6 BLK or 8.6 Creedmoor, is a centerfire rifle cartridge developed by the firearms manufacturer Q, LLC. It utilizes a shortened case from the 6.5mm Creedmoor necked up to an 8.6 mm caliber (8.585 mm or 0.338 in diameter) projectile and designed for use in bolt action rifles or as a caliber conversion for AR10 and AR-308 rifles. The 8.6 Blackout has been designed for barrels using a 76 mm or 102 mm (1:3 in or 1:4 in) twist rate and bullet weights between 10.4–14.6 g (160–225 gr) for supersonic loads and 18.5–22.7 g (285–350 gr) for subsonic loads.

See also

• .300 AAC Blackout