Load data for .300 RCM + 155gr Nosler Custom Competition
The most recommended powders for this combination are Alliant Reloder-15.
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
Cartridge:.300 RCM load data
Case Length (L3):2.090" | 53.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.422" | 10.7 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 + 155gr Nosler Custom Competition
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) |
|---|---|---|---|---|---|
| 53.5 gr | 2.760" | 24.0" | 2840 fps | ••• | |
| 57.8 gr | 2.830" | 24.0" | 2900 fps | ••• | |
| 61.5 gr | 2.830" | 24.0" | 3062 fps | ••• | |
| ••• | 2.830" | 24.0" | 2854 fps | ••• | |
| ••• | 2.830" | 24.0" | 3021 fps | ••• | |
| ••• | 2.830" | 24.0" | 2961 fps | ••• | |
| ••• | 2.760" | 24.0" | 2761 fps | ••• | |
| ••• | 2.830" | 24.0" | 2803 fps | ••• | |
| ••• | 2.830" | 24.0" | 2815 fps | ••• | |
| ••• | 2.830" | 24.0" | 2959 fps | ••• | |
| ••• | 2.830" | 24.0" | 2950 fps | ••• | |
| ••• | 2.830" | 24.0" | 2769 fps | ••• | |
| ••• | 2.830" | 24.0" | 2916 fps | ••• | |
| ••• | 2.760" | 24.0" | 2925 fps | ••• | |
| ••• | 2.830" | 24.0" | 2854 fps | ••• | |
| ••• | 2.760" | 24.0" | 2786 fps | ••• | |
| ••• | 2.830" | 24.0" | 2806 fps | ••• | |
| ••• | 2.760" | 24.0" | 2879 fps | ••• | |
| ••• | 2.830" | 24.0" | 2966 fps | ••• | |
| ••• | 2.830" | 24.0" | 2855 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.