Load Specifications
Bullet Manufacturer:Reichenberg
Bullet Weight:156 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 RCM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:75 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:12.5
Load data in caliber .300 RCM with .308 | 156gr | Reichenbeg HDB Ogival bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 56,811 psi | 89% | 2858 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,172 psi | 86% | 2881 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,375 psi | 85% | 2871 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,406 psi | 90% | 2946 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,042 psi | 86% | 2864 fps | 95.9% |
| Accurate 4064 | <<locked>> | 94% | 54,317 psi | 85% | 2917 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,328 psi | 79% | 2930 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 82% | 56,188 psi | 88% | 2802 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,637 psi | 89% | 2831 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,985 psi | 88% | 2956 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 96% | 57,000 psi | 89% | 2953 fps | 99.6% |
| ADI AR 2219 | <<locked>> | 82% | 57,377 psi | 90% | 2927 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,201 psi | 87% | 2910 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,564 psi | 87% | 2887 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,971 psi | 89% | 3018 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,709 psi | 87% | 3074 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,666 psi | 89% | 2976 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,391 psi | 88% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,363 psi | 90% | 2995 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 2940 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,809 psi | 84% | 3038 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,664 psi | 54% | 2644 fps | 96.2% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,288 psi | 87% | 2795 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,927 psi | 88% | 2969 fps | 99.3% |
| Bofors RP3 | <<locked>> | 96% | 57,014 psi | 89% | 2986 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2949 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,174 psi | 90% | 2894 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,360 psi | 85% | 2940 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,492 psi | 89% | 3041 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 55,796 psi | 87% | 2907 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 57,232 psi | 90% | 2936 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,694 psi | 86% | 2943 fps | 98.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 2986 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 90% | 56,536 psi | 89% | 2966 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,513 psi | 71% | 2815 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,811 psi | 87% | 2999 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3025 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,867 psi | 55% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,447 psi | 85% | 2917 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 56,231 psi | 88% | 2953 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,666 psi | 89% | 2936 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,188 psi | 90% | 2917 fps | 97.2% |
| IMR 4198 | <<locked>> | 84% | 56,942 psi | 89% | 2825 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,275 psi | 88% | 2933 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 2867 fps | 98.2% |
| IMR 4895 | <<locked>> | 92% | 55,216 psi | 87% | 2976 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 55,201 psi | 87% | 2910 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,245 psi | 87% | 2894 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,492 psi | 87% | 2933 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,854 psi | 88% | 2881 fps | 99.8% |
| Lovex S062 | <<locked>> | 94% | 56,014 psi | 88% | 2930 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2920 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2900 fps | 96.6% |
| Norma 201 | <<locked>> | 90% | 54,433 psi | 85% | 2897 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,085 psi | 86% | 2904 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,463 psi | 88% | 2982 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 50,140 psi | 79% | 2927 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 94% | 57,377 psi | 90% | 3012 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,182 psi | 77% | 2913 fps | 96.7% |
| Ramshot TAC | <<locked>> | 88% | 55,608 psi | 87% | 2923 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,984 psi | 86% | 2943 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,434 psi | 88% | 2913 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,201 psi | 55% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,824 psi | 86% | 2894 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,448 psi | 87% | 2927 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,128 psi | 85% | 3009 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,493 psi | 90% | 3100 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,169 psi | 79% | 2953 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 2979 fps | 98% |
| Rottweil R 901 | <<locked>> | 88% | 55,143 psi | 86% | 2881 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,868 psi | 86% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,855 psi | 89% | 2976 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2949 fps | 96.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2920 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,492 psi | 87% | 2933 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,014 psi | 88% | 2930 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2900 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,462 psi | 85% | 2861 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,725 psi | 90% | 2940 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,288 psi | 87% | 2989 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,551 psi | 90% | 2887 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,882 psi | 84% | 2900 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,534 psi | 85% | 2927 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,739 psi | 89% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,637 psi | 89% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 2877 fps | 96.9% |
| Somchem S321 | <<locked>> | 86% | 56,463 psi | 88% | 2943 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,564 psi | 87% | 2838 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,101 psi | 89% | 2946 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 57,145 psi | 90% | 2972 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2867 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 56,391 psi | 88% | 2812 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,869 psi | 89% | 2831 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,433 psi | 85% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,709 psi | 87% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,477 psi | 87% | 2907 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 2923 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 88% | 55,840 psi | 88% | 2910 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,319 psi | 90% | 2927 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 2927 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,028 psi | 58% | 2720 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,664 psi | 84% | 2910 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 55,477 psi | 87% | 2959 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 2989 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,085 psi | 85% | 2933 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,121 psi | 69% | 2667 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,182 psi | 76% | 2776 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,143 psi | 57% | 2569 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,308 psi | 68% | 2730 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 51,619 psi | 81% | 2812 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 34,214 psi | 54% | 2556 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 37,811 psi | 59% | 2690 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 52,707 psi | 83% | 2756 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,142 psi | 83% | 2779 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,683 psi | 64% | 2680 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 34,606 psi | 54% | 2526 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 53,708 psi | 84% | 2877 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,757 psi | 67% | 2697 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 42,293 psi | 66% | 2694 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,835 psi | 78% | 2907 fps | 99.6% |
| Alliant Power Pro 2000-MR | 51.3 gr | 80% | 36,680 psi | 57% | 2687 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,736 psi | 53% | 2543 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,009 psi | 78% | 2772 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,434 psi | 57% | 2608 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,493 psi | 60% | 2710 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,373 psi | 52% | 2612 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,547 psi | 51% | 2585 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,793 psi | 81% | 2746 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,624 psi | 62% | 2674 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 32,996 psi | 52% | 2536 fps | 96.5% |
| Bofors RP7 | <<locked>> | 96% | 50,676 psi | 79% | 2838 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,556 psi | 70% | 2690 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,017 psi | 64% | 2710 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,295 psi | 71% | 2851 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 80% | 48,892 psi | 77% | 2805 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,850 psi | 78% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 39,160 psi | 61% | 2657 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 96% | 47,050 psi | 74% | 2867 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 40,988 psi | 64% | 2694 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,793 psi | 51% | 2539 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,825 psi | 58% | 2654 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 98% | 51,416 psi | 81% | 2956 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,744 psi | 40% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,407 psi | 62% | 2644 fps | 97.8% |
| IMR 3031 | <<locked>> | 80% | 40,321 psi | 63% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,303 psi | 57% | 2562 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,108 psi | 74% | 2749 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 50,459 psi | 79% | 2733 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 49,647 psi | 78% | 2825 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 36,506 psi | 57% | 2644 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 37,318 psi | 58% | 2638 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 80% | 42,757 psi | 67% | 2697 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 48,008 psi | 75% | 2782 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 39,044 psi | 61% | 2657 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 41,191 psi | 65% | 2628 fps | 97.8% |
| Lovex S062 | <<locked>> | 80% | 35,940 psi | 56% | 2566 fps | 97.8% |
| Lovex S065 | <<locked>> | 92% | 42,844 psi | 67% | 2707 fps | 95.5% |
| Lovex S070 | <<locked>> | 96% | 46,122 psi | 72% | 2789 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,566 psi | 62% | 2635 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 39,929 psi | 63% | 2651 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 35,839 psi | 56% | 2595 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 38,334 psi | 60% | 2694 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 35,230 psi | 55% | 2602 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 96% | 43,062 psi | 67% | 2795 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 42,757 psi | 67% | 2694 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,974 psi | 66% | 2717 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,195 psi | 72% | 2743 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 41% | 1624 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,993 psi | 75% | 2785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 45,397 psi | 71% | 2756 fps | 95.3% |
| ReloadSwiss RS 52 | 49.8 gr | 80% | 37,942 psi | 59% | 2707 fps | 96.4% |
| ReloadSwiss RS 60 | 50.5 gr | 80% | 30,951 psi | 49% | 2556 fps | 97.3% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,927 psi | 59% | 2713 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,307 psi | 65% | 2785 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,395 psi | 68% | 2687 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,753 psi | 59% | 2585 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 31,067 psi | 49% | 2484 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 96% | 50,676 psi | 79% | 2838 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,844 psi | 67% | 2707 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,044 psi | 61% | 2657 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 35,940 psi | 56% | 2566 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 96% | 46,122 psi | 72% | 2789 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,763 psi | 80% | 2805 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,925 psi | 85% | 2884 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,534 psi | 54% | 2592 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,966 psi | 80% | 2795 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,640 psi | 64% | 2661 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,291 psi | 62% | 2651 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,437 psi | 65% | 2602 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,142 psi | 54% | 2464 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 48,660 psi | 76% | 2762 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 45,919 psi | 72% | 2772 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 40,727 psi | 64% | 2602 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,335 psi | 63% | 2661 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 32,053 psi | 50% | 2490 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 29,878 psi | 47% | 2523 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 46,978 psi | 74% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,713 psi | 65% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,999 psi | 58% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,869 psi | 59% | 2585 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 30,530 psi | 48% | 2434 fps | 96.5% |
| Vihtavuori N160 | <<locked>> | 90% | 37,710 psi | 59% | 2644 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 42,699 psi | 67% | 2690 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 36,260 psi | 57% | 2566 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 39,494 psi | 62% | 2700 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 98% | 34,795 psi | 55% | 2667 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,315 psi | 52% | 2513 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 41,930 psi | 66% | 2733 fps | 99.5% |
| Winchester 760 | <<locked>> | 96% | 47,326 psi | 74% | 2871 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,450 psi | 60% | 2648 fps | 97.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 105 powders for .300 RCM loaded with the .308 | 156gr | Reichenbeg HDB Ogival. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,100 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .300 RCM with the .308 | 156gr | Reichenbeg HDB Ogival they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.