Load data for .30-378 Weath. Mag. + 200gr Nosler Partition
The most recommended powders for this combination are Hodgdon 50BMG.
Based on C.I.P., the max. allowed case length is 2.913 in / 73.99 mm, the max. cartridge length is 3.750 in / 95.25 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 3.750 in / 95.25 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Bullet:.308 | 200gr | Partition
Cartridge:.30-378 Weath. Mag. load data
Case Length (L3):2.913" | 74.0 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.633" | 16.1 mm
Case Capacity:133 gow | 8.62 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:1:12.5
Get PRO license to unlock all data and calculators
Community Loads for .30-378 Weath. Mag. + 200gr Nosler Partition
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) |
|---|---|---|---|---|---|
| 91.0 gr | 3.630" | 26.0" | 2825 fps | ••• | |
| 93.0 gr | 3.630" | 26.0" | 2873 fps | ••• | |
| 95.0 gr | 3.630" | 26.0" | 2923 fps | ••• | |
| ••• | 3.630" | 26.0" | 3026 fps | ••• | |
| ••• | 3.630" | 26.0" | 3085 fps | ••• | |
| ••• | 3.630" | 26.0" | 3144 fps | ••• | |
| ••• | 3.630" | 26.0" | 2847 fps | ••• | |
| ••• | 3.630" | 26.0" | 2902 fps | ••• | |
| ••• | 3.630" | 26.0" | 2954 fps | ••• | |
| ••• | 3.630" | 26.0" | 2902 fps | ••• | |
| ••• | 3.630" | 26.0" | 2958 fps | ••• | |
| ••• | 3.630" | 26.0" | 3013 fps | ••• | |
| ••• | 3.630" | 26.0" | 2887 fps | ••• | |
| ••• | 3.630" | 26.0" | 2942 fps | ••• | |
| ••• | 3.630" | 26.0" | 2995 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.