Load data for .338-378 Weath. Mag. + 250gr Nosler Partition RN
The most recommended powders for this combination are Vihtavuori N165.
Based on C.I.P., the max. allowed case length is 2.913 in / 73.99 mm, the max. cartridge length is 3.763 in / 95.58 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.913 in / 73.99 mm, the max. cartridge length is 3.763 in / 95.58 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Bullet:.338 | 250gr | Partition RN
Cartridge:.338-378 Weath. Mag. load data
Case Length (L3):2.910" | 73.9 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.550" | 14.0 mm
Case Capacity:137 gow | 8.88 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:26.0" | 660 mm
Min. Twist Rate:1:15.5
Get PRO license to unlock all data and calculators
Community Loads for .338-378 Weath. Mag. + 250gr Nosler Partition RN
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 103.0 gr | 3.700" | 26.0" | 2752 fps | ••• | |
| 105.0 gr | 3.700" | 26.0" | 2802 fps | ••• | |
| 107.0 gr | 3.700" | 26.0" | 2851 fps | ••• | |
| ••• | 3.700" | 26.0" | 2703 fps | ••• | |
| ••• | 3.700" | 26.0" | 2751 fps | ••• | |
| ••• | 3.700" | 26.0" | 2799 fps | ••• | |
| ••• | 3.700" | 26.0" | 2610 fps | ••• | |
| ••• | 3.700" | 26.0" | 2657 fps | ••• | |
| ••• | 3.700" | 26.0" | 2702 fps | ••• | |
| ••• | 3.700" | 26.0" | 2773 fps | ••• | |
| ••• | 3.700" | 26.0" | 2823 fps | ••• | |
| ••• | 3.700" | 26.0" | 2873 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.