Load data for .300 RCM + 150gr Speer Soft Point
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 | 150gr | Soft Point
Cartridge:.300 RCM load data
Case Length (L3):2.090" | 53.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.280" | 7.1 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:1:16.0
Get PRO license to unlock all data and calculators
Community Loads for .300 RCM + 150gr Speer Soft Point
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) |
|---|---|---|---|---|---|
| 61.0 gr | 2.840" | — | 2897 fps | ••• | |
| 52.8 gr | 2.840" | — | 2776 fps | ••• | |
| 58.7 gr | 2.840" | — | 3034 fps | ••• | |
| ••• | 2.840" | — | 2895 fps | ••• | |
| ••• | 2.840" | — | 3180 fps | ••• | |
| ••• | 2.840" | — | 2993 fps | ••• | |
| ••• | 2.840" | — | 2682 fps | ••• | |
| ••• | 2.840" | — | 2967 fps | ••• | |
| ••• | 2.840" | — | 2683 fps | ••• | |
| ••• | 2.840" | — | 2946 fps | ••• | |
| ••• | 2.840" | — | 2797 fps | ••• | |
| ••• | 2.840" | — | 2785 fps | ••• | |
| ••• | 2.840" | — | 3044 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.