| .308×1.5" Barnes |
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| Type | Rifle |
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| Place of origin | USA |
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| Designer | Frank Barnes |
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| Designed | 1961 |
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| Variants | .30 BR |
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| Parent case | .308 Winchester (7.62×51mm NATO) |
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| Case type | Rimless bottlenecked |
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| Bullet diameter | .308 |
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| Neck diameter | .338 |
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| Shoulder diameter | .450 |
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| Base diameter | .466 |
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| Rim diameter | .470 |
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| Rim thickness | .048 |
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| Case length | 1.500 |
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| Overall length | 2.05 in (52 mm) |
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| Case capacity | 38.0 gr H2O (2.46 cm3) |
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| Rifling twist | 12 |
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| Primer type | Large rifle |
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| Maximum pressure | Approximately 60,000 psi (4,100 bar) |
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| Bullet mass/type |
Velocity |
Energy |
| 150 gr (10 g) spitzer |
2,500 ft/s (760 m/s) |
2,082 ft⋅lbf (2,823 J) |
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The .308×1.5" Barnes is a wildcat cartridge based on the .308 Winchester (7.62×51mm NATO). The cartridge is similar to the 7.62×39mm Russian (M43) cartridge though it outperforms the Soviet cartridge. It was designed by Frank C. Barnes in March 1961 by shortening the .308 Winchester to 1.5 in (38 mm) and giving it a shoulder angle of 20° (α=40°) similar to the parent cartridge.
