Load data for .300 RCM + 165gr Speer Boat-Tail
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 | Boat-Tail
Cartridge:.300 RCM load data
Case Length (L3):2.090" | 53.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.439" | 11.2 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:1:13.5
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Community Loads for .300 RCM + 165gr Speer Boat-Tail
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" | — | 2808 fps | ••• | |
| 63.2 gr | 2.840" | — | 3082 fps | ••• | |
| 54.5 gr | 2.840" | — | 2644 fps | ••• | |
| ••• | 2.840" | — | 2915 fps | ••• | |
| ••• | 2.840" | — | 2808 fps | ••• | |
| ••• | 2.840" | — | 2635 fps | ••• | |
| ••• | 2.840" | — | 2889 fps | ••• | |
| ••• | 2.840" | — | 2668 fps | ••• | |
| ••• | 2.840" | — | 2972 fps | ••• | |
| ••• | 2.840" | — | 2739 fps | ••• | |
| ••• | 2.840" | — | 3011 fps | ••• | |
| ••• | 2.840" | — | 2850 fps | ••• | |
| ••• | 2.840" | — | 3059 fps | ••• | |
| ••• | 2.840" | — | 2508 fps | ••• | |
| ••• | 2.840" | — | 2775 fps | ••• | |
| ••• | 2.840" | — | 2607 fps | ••• | |
| ••• | 2.840" | — | 2893 fps | ••• | |
| ••• | 2.840" | — | 2906 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.