| .375 Viersco Magnum | |
| Origin: | United States |
| Type: | Rifle |
| Designer: | Viersco, MFG |
| Manufacturer: | Viersco |
| Parent: | Unique |
| Case Type: | Rimless, bottleneck |
| Bullet: | .375 in. (9.5mm) |
| Neck: | .398 in (10.11 mm) |
| Shoulder: | .664 in (16.86 mm) |
| Base: | .680 in (17.272 mm) |
| Rim Dia: | .675 in (17.145 mm) |
| Rim Thick: | .065 in (1.7 mm) |
| Case Length: | 3.445 in (87.5 mm) |
| Length: | 4.150 in (105.41 mm) |
| Case Capacity: | 190 |
| Rifling: | 1 in 10 in (254 mm) or 1 in 7 in (180 mm) |
| Max Pressure: | 64800 |
| Primer: | Large rifle |
| Bw1: | 300 |
| Btype1: | SP |
| Vel1: | 2840 |
| En1: | 5374 |
| Bw2: | 350 |
| Btype2: | DGS |
| Vel2: | 2660 |
| En2: | 5500 |
| Bw3: | 375 |
| Vel3: | 2326 |
| En3: | 4506 |
| Test Barrel Length: | 26 |
| Balsrc: | Viersco Mfg[1] |
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.