6.8mm Remington SPC
Intermediate rifle cartridge / From Wikipedia, the free encyclopedia
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The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command[6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines. Based on the .30 Remington cartridge,[7] it is midway between the 5.56×45mm NATO and 7.62×51mm NATO in bore diameter. It uses the same diameter bullet (usually not the same mass) as the .270 Winchester hunting cartridge.
Quick Facts Place of origin, Production history ...
6.8×43mm Remington SPC | ||||||||||||||||||||
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Place of origin | United States | |||||||||||||||||||
Production history | ||||||||||||||||||||
Designer | Remington Arms, USSOCOM | |||||||||||||||||||
Designed | 2002–2004 | |||||||||||||||||||
Specifications | ||||||||||||||||||||
Parent case | .30 Remington | |||||||||||||||||||
Case type | Rimless, bottlenecked | |||||||||||||||||||
Bullet diameter | 0.277 in (7.0 mm) | |||||||||||||||||||
Land diameter | 0.270 in (6.9 mm)[1] | |||||||||||||||||||
Neck diameter | 0.306 in (7.8 mm) | |||||||||||||||||||
Shoulder diameter | 0.402 in (10.2 mm) | |||||||||||||||||||
Base diameter | 0.422 in (10.7 mm)[1] | |||||||||||||||||||
Rim diameter | 0.422 in (10.7 mm) | |||||||||||||||||||
Rim thickness | 0.049 in (1.2 mm) | |||||||||||||||||||
Case length | 1.687 in (42.8 mm)[1] | |||||||||||||||||||
Overall length | 2.260 in (57.4 mm) | |||||||||||||||||||
Case capacity | 34.8–36.9 gr H2O (2.26–2.39 cm3) | |||||||||||||||||||
Primer type | Large Rifle | |||||||||||||||||||
Maximum pressure (C.I.P) | 58,700 psi (405 MPa) | |||||||||||||||||||
Maximum pressure (SAAMI) | 55,000 psi (380 MPa) | |||||||||||||||||||
Ballistic performance | ||||||||||||||||||||
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Test barrel length: 410 mm (16 in)
[2][3][4] Source(s): [5] |
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