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6mm BR
US rifle cartridge for benchrest shooting / From Wikipedia, the free encyclopedia
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The 6mm BR is a centerfire cartridge created for benchrest shooting. The cartridge is also known as the 6mm Bench Rest or simply 6 BR, and has also developed a following among varmint hunters because of its efficiency.[5] There are two basic variants of very similar dimensions, known as the 6mm BR Remington and the 6mm Norma BR.
Quick Facts Type, Place of origin ...
6mm BR Remington | |
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![]() 6mm BR, 6mm Dasher and .308 Winchester cartridges | |
Type | Rifle |
Place of origin | United States |
Production history | |
Designer | Wildcats: Various Commercial: Mike Walker |
Designed | Wildcats: 1962-1963 Commercial: 1978 |
Produced | 1978–present |
Variants | Several. See article. |
Specifications | |
Parent case | .308 Winchester |
Case type | Rimless, Bottleneck |
Bullet diameter | .243 in (6.2 mm) |
Neck diameter | .270 in (6.9 mm) |
Shoulder diameter | .458 in (11.6 mm) |
Base diameter | .473 in (12.0 mm) |
Case length | 1.560 in (39.6 mm) |
Primer type | small rifle |
Maximum CUP | 52,000 CUP |
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Quick Facts Type, Place of origin ...
6mm Norma BR | ||||||||||||||||
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Type | Rifle | |||||||||||||||
Place of origin | Sweden | |||||||||||||||
Production history | ||||||||||||||||
Manufacturer | Norma | |||||||||||||||
Produced | 1996 | |||||||||||||||
Specifications | ||||||||||||||||
Parent case | 6mm BR Remington | |||||||||||||||
Case type | Semi-rimmed, Bottleneck | |||||||||||||||
Bullet diameter | 0.243 in (6.2 mm) | |||||||||||||||
Land diameter | 0.236 in (6.0 mm) | |||||||||||||||
Neck diameter | 0.271 in (6.9 mm) | |||||||||||||||
Shoulder diameter | 0.458 in (11.6 mm) | |||||||||||||||
Base diameter | 0.469 in (11.9 mm) | |||||||||||||||
Rim diameter | 0.473 in (12.0 mm) | |||||||||||||||
Rim thickness | 0.054 in (1.4 mm) | |||||||||||||||
Case length | 1.560 in (39.6 mm) | |||||||||||||||
Overall length | 2.440 in (62.0 mm) | |||||||||||||||
Case capacity | 38-39.5 gr (2.45-2.55 ml)[1] | |||||||||||||||
Ballistic performance | ||||||||||||||||
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Test barrel length: 670mm Source(s): [2][3][4] |
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