Load data for .300 Weath. Mag. + 190gr Nosler Custom Competition
The most recommended powders for this combination are Vihtavuori N165.
Based on C.I.P., the max. allowed case length is 2.825 in / 71.75 mm, the max. cartridge length is 3.560 in / 90.42 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Based on C.I.P., the max. allowed case length is 2.825 in / 71.75 mm, the max. cartridge length is 3.560 in / 90.42 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Cartridge:.300 Weath. Mag. load data
Case Length (L3):2.824" | 71.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.595" | 15.1 mm
Case Capacity:98.9 gow | 6.41 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:12.5
Get PRO license to unlock all data and calculators
Community Loads for .300 Weath. Mag. + 190gr Nosler Custom Competition
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) |
|---|---|---|---|---|---|
| 75.0 gr | 3.550" | 26.0" | 2858 fps | ••• | |
| 77.0 gr | 3.550" | 26.0" | 2929 fps | ••• | |
| 79.0 gr | 3.550" | 26.0" | 2984 fps | ••• | |
| ••• | 3.550" | 26.0" | 2978 fps | ••• | |
| ••• | 3.550" | 26.0" | 3051 fps | ••• | |
| ••• | 3.550" | 26.0" | 2862 fps | ••• | |
| ••• | 3.550" | 26.0" | 2923 fps | ••• | |
| ••• | 3.550" | 26.0" | 2861 fps | ••• | |
| ••• | 3.550" | 26.0" | 2914 fps | ••• | |
| ••• | 3.550" | 26.0" | 2977 fps | ••• | |
| ••• | 3.550" | 26.0" | 2869 fps | ••• | |
| ••• | 3.550" | 26.0" | 2931 fps | ••• | |
| ••• | 3.550" | 26.0" | 2999 fps | ••• | |
| ••• | 3.550" | 26.0" | 3070 fps | ••• | |
| ••• | 3.550" | 26.0" | 2815 fps | ••• | |
| ••• | 3.550" | 26.0" | 2881 fps | ••• | |
| ••• | 3.550" | 26.0" | 2945 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.