The .375 Viersco Magnum (9.5 x 87.5mm) is a rimless, magnum-length rifle cartridge designed for the hunting of large game and long-range competition shooting. The case is engineered with a wider than typical .532" or .640" magnum base, increasing case volume to improve long-range performance.
| .375 Viersco Magnum |
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| Type | Rifle |
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| Place of origin | United States |
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| Designer | Viersco, MFG |
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| Manufacturer | Viersco |
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| Parent case | Unique |
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| Case type | Rimless, bottleneck |
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| Bullet diameter | .375 in. (9.5mm) |
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| Neck diameter | .398 in (10.11 mm) |
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| Shoulder diameter | .664 in (16.86 mm) |
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| Base diameter | .680 in (17.272 mm) |
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| Rim diameter | .675 in (17.145 mm) |
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| Rim thickness | .065 in (1.7 mm) |
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| Case length | 3.445 in (87.5 mm) |
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| Overall length | 4.150 in (105.41 mm) |
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| Case capacity | 190 gr H2O (12 cm3) |
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| Rifling twist | 1 in 10 in (254 mm) or 1 in 7 in (180 mm) |
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| Primer type | Large rifle |
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| Maximum pressure | 64,800 psi (447 MPa) |
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| Bullet mass/type |
Velocity |
Energy |
| 300 gr (19 g) SP |
2,840 ft/s (870 m/s) |
5,374 ft⋅lbf (7,286 J) |
| 350 gr (23 g) DGS |
2,660 ft/s (810 m/s) |
5,500 ft⋅lbf (7,500 J) |
| 375 gr (24 g) |
2,326 ft/s (709 m/s) |
4,506 ft⋅lbf (6,109 J) |
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Test barrel length: 26
Source(s): Viersco Mfg[1] |
