Load data for .30-378 Weath. Mag. + 180gr Speer Grand Slam
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 | 180gr | Grand Slam
Cartridge:.30-378 Weath. Mag. load data
Case Length (L3):2.913" | 74.0 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.428" | 10.9 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:1:15.0
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Community Loads for .30-378 Weath. Mag. + 180gr Speer Grand Slam
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) |
|---|---|---|---|---|---|
| 94.0 gr | 3.645" | — | 2938 fps | ••• | |
| 98.0 gr | 3.645" | — | 3035 fps | ••• | |
| 115.0 gr | 3.645" | — | 2879 fps | ••• | |
| ••• | 3.645" | — | 2994 fps | ••• | |
| ••• | 3.645" | — | 3106 fps | ••• | |
| ••• | 3.645" | — | 3176 fps | ••• | |
| ••• | 3.645" | — | 3040 fps | ••• | |
| ••• | 3.645" | — | 3149 fps | ••• | |
| ••• | 3.645" | — | 3036 fps | ••• | |
| ••• | 3.645" | — | 3129 fps | ••• | |
| ••• | 3.645" | — | 3061 fps | ••• | |
| ••• | 3.645" | — | 3172 fps | ••• | |
| ••• | 3.645" | — | 3253 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.