Load data for .300 RCM + 180gr Speer Grand Slam
Based on C.I.P., the max. allowed case length is 2.100 in / 53.34 mm, the max. cartridge length is 2.840 in / 72.14 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.100 in / 53.34 mm, the max. cartridge length is 2.840 in / 72.14 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Bullet:.308 | 180gr | Grand Slam
Cartridge:.300 RCM load data
Case Length (L3):2.090" | 53.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.430" | 10.9 mm
Case Capacity:75 gow | 4.86 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:15.0
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Community Loads for .300 RCM + 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) |
|---|---|---|---|---|---|
| 54.8 gr | 2.820" | — | 2665 fps | ••• | |
| 60.7 gr | 2.820" | — | 2916 fps | ••• | |
| 52.8 gr | 2.820" | — | 2531 fps | ••• | |
| ••• | 2.820" | — | 2773 fps | ••• | |
| ••• | 2.820" | — | 2651 fps | ••• | |
| ••• | 2.820" | — | 2938 fps | ••• | |
| ••• | 2.820" | — | 2465 fps | ••• | |
| ••• | 2.820" | — | 2696 fps | ••• | |
| ••• | 2.820" | — | 2532 fps | ••• | |
| ••• | 2.820" | — | 2801 fps | ••• | |
| ••• | 2.820" | — | 2601 fps | ••• | |
| ••• | 2.820" | — | 2847 fps | ••• | |
| ••• | 2.820" | — | 2678 fps | ••• | |
| ••• | 2.820" | — | 2846 fps | ••• | |
| ••• | 2.820" | — | 2390 fps | ••• | |
| ••• | 2.820" | — | 2616 fps | ••• | |
| ••• | 2.820" | — | 2449 fps | ••• | |
| ••• | 2.820" | — | 2696 fps | ••• | |
| ••• | 2.820" | — | 2712 fps | ••• | |
| ••• | 2.820" | — | 2966 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.