Load data for .375 H&H Mag. + 300gr Nosler Partition
The most recommended powders for this combination are Alliant Reloder-19.
Based on C.I.P., the max. allowed case length is 2.850 in / 72.39 mm, the max. cartridge length is 3.600 in / 91.44 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Based on C.I.P., the max. allowed case length is 2.850 in / 72.39 mm, the max. cartridge length is 3.600 in / 91.44 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Load Specifications
ImperialMetric
Bullet:.375 | 300gr | Partition
Cartridge:.375 H&H Mag. load data
Case Length (L3):2.859" | 72.6 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.640" | 16.3 mm
Case Capacity:95.3 gow | 6.18 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):62,366 psi | 4,300 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:6.0
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Community Loads for .375 H&H Mag. + 300gr 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) |
|---|---|---|---|---|---|
| 64.0 gr | 3.550" | 24.0" | 2425 fps | ••• | |
| 66.0 gr | 3.550" | 24.0" | 2488 fps | ••• | |
| 68.0 gr | 3.550" | 24.0" | 2549 fps | ••• | |
| ••• | 3.550" | 24.0" | 2464 fps | ••• | |
| ••• | 3.550" | 24.0" | 2531 fps | ••• | |
| ••• | 3.550" | 24.0" | 2472 fps | ••• | |
| ••• | 3.550" | 24.0" | 2531 fps | ••• | |
| ••• | 3.550" | 24.0" | 2416 fps | ••• | |
| ••• | 3.550" | 24.0" | 2480 fps | ••• | |
| ••• | 3.550" | 24.0" | 2543 fps | ••• | |
| ••• | 3.563" | — | 2316 fps | ••• | |
| ••• | 3.563" | — | 2425 fps | ••• | |
| ••• | 3.563" | — | 2457 fps | ••• | |
| ••• | 3.563" | — | 2442 fps | ••• | |
| ••• | 3.563" | — | 2554 fps | ••• | |
| ••• | 3.550" | 24.0" | 2547 fps | ••• | |
| ••• | 3.550" | 24.0" | 2611 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.