Load data for .300 RCM + 165gr Speer Hot-Cor
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 | 165gr | Hot-Cor
Cartridge:.300 RCM load data
Case Length (L3):2.090" | 53.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.390" | 9.9 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:1:14.5
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Community Loads for .300 RCM + 165gr Speer Hot-Cor
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) |
|---|---|---|---|---|---|
| 57.0 gr | 2.840" | — | 2791 fps | ••• | |
| 63.2 gr | 2.840" | — | 3065 fps | ••• | |
| 54.5 gr | 2.840" | — | 2629 fps | ••• | |
| ••• | 2.840" | — | 2897 fps | ••• | |
| ••• | 2.840" | — | 2798 fps | ••• | |
| ••• | 2.840" | — | 2619 fps | ••• | |
| ••• | 2.840" | — | 2873 fps | ••• | |
| ••• | 2.840" | — | 2658 fps | ••• | |
| ••• | 2.840" | — | 2951 fps | ••• | |
| ••• | 2.840" | — | 2731 fps | ••• | |
| ••• | 2.840" | — | 3002 fps | ••• | |
| ••• | 2.840" | — | 2832 fps | ••• | |
| ••• | 2.840" | — | 3041 fps | ••• | |
| ••• | 2.840" | — | 2500 fps | ••• | |
| ••• | 2.840" | — | 2758 fps | ••• | |
| ••• | 2.840" | — | 2600 fps | ••• | |
| ••• | 2.840" | — | 2876 fps | ••• | |
| ••• | 2.840" | — | 2888 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.