Load data for .300 Win. Mag. + 180gr Speer Grand Slam
The most recommended powders for this combination are IMR 4350.
Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
ImperialMetric
Bullet:.308 | 180gr | Grand Slam
Cartridge:.300 Win. Mag. load data
Case Length (L3):2.620" | 66.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.495" | 12.6 mm
Case Capacity:90.5 gow | 5.86 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:1:15.0
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Community Loads for .300 Win. 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) |
|---|---|---|---|---|---|
| 71.0 gr | 3.285" | — | 2687 fps | ••• | |
| 75.0 gr | 3.285" | — | 2830 fps | ••• | |
| 82.0 gr | 3.285" | — | 2358 fps | ••• | |
| ••• | 3.285" | — | 2791 fps | ••• | |
| ••• | 3.285" | — | 2750 fps | ••• | |
| ••• | 3.285" | — | 2994 fps | ••• | |
| ••• | 3.285" | — | 2855 fps | ••• | |
| ••• | 3.285" | — | 2998 fps | ••• | |
| ••• | 3.285" | — | 2806 fps | ••• | |
| ••• | 3.285" | — | 2956 fps | ••• | |
| ••• | 3.285" | — | 2769 fps | ••• | |
| ••• | 3.285" | — | 3010 fps | ••• | |
| ••• | 3.285" | — | 2807 fps | ••• | |
| ••• | 3.285" | — | 2952 fps | ••• | |
| ••• | 3.285" | — | 2695 fps | ••• | |
| ••• | 3.285" | — | 2994 fps | ••• | |
| ••• | 3.285" | — | 2754 fps | ••• | |
| ••• | 3.285" | — | 2911 fps | ••• | |
| ••• | 3.285" | — | 2689 fps | ••• | |
| ••• | 3.285" | — | 2849 fps | ••• | |
| ••• | 3.285" | — | 2718 fps | ••• | |
| ••• | 3.285" | — | 2868 fps | ••• | |
| ••• | 3.285" | — | 2789 fps | ••• | |
| ••• | 3.340" | 26.4" | 2963 fps | ••• | |
| ••• | 3.285" | — | 2926 fps | ••• | |
| ••• | 3.285" | — | 2836 fps | ••• | |
| ••• | 3.285" | — | 2969 fps | ••• | |
| ••• | 3.285" | — | 2825 fps | ••• | |
| ••• | 3.285" | — | 2724 fps | ••• | |
| ••• | 3.285" | — | 2873 fps | ••• | |
| ••• | 3.285" | — | 2832 fps | ••• | |
| ••• | 3.285" | — | 2990 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.