Load Specifications
Bullet Manufacturer:MRR
Bullet Weight:167 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 | 167gr | MRR Green Hunting bullet and 106 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 Alliant Reloder-17.
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>> | 86% | 54,911 psi | 86% | 2730 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,942 psi | 89% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,434 psi | 88% | 2795 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,376 psi | 87% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,652 psi | 89% | 2799 fps | 96.9% |
| Accurate 4064 | <<locked>> | 94% | 56,478 psi | 89% | 2841 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,533 psi | 82% | 2867 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 82% | 57,537 psi | 90% | 2720 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,201 psi | 85% | 2828 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,230 psi | 87% | 2828 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,826 psi | 89% | 2835 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 57,406 psi | 90% | 2805 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,172 psi | 86% | 2890 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 57,667 psi | 90% | 3002 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,071 psi | 86% | 2851 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,911 psi | 86% | 2736 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,709 psi | 87% | 2871 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 2877 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,985 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,984 psi | 56% | 2598 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,929 psi | 63% | 2743 fps | 96.3% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,029 psi | 89% | 2720 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 57,725 psi | 90% | 2897 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 55,535 psi | 87% | 2864 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,999 psi | 88% | 2831 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,419 psi | 87% | 2769 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,086 psi | 88% | 2864 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,331 psi | 85% | 2907 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 57,667 psi | 90% | 2828 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,100 psi | 86% | 2805 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,811 psi | 89% | 2881 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,883 psi | 88% | 2920 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 98% | 57,217 psi | 90% | 2890 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 88% | 54,708 psi | 86% | 2841 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,210 psi | 74% | 2753 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,740 psi | 90% | 2923 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 57,377 psi | 90% | 2963 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,085 psi | 55% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,130 psi | 88% | 2844 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,592 psi | 86% | 2825 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,824 psi | 86% | 2812 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,013 psi | 86% | 2792 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 55,100 psi | 86% | 2697 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 2802 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,636 psi | 86% | 2815 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 2808 fps | 99% |
| IMR 4895 | <<locked>> | 92% | 57,130 psi | 90% | 2904 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 56,826 psi | 89% | 2835 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,101 psi | 89% | 2818 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 57,305 psi | 90% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,638 psi | 90% | 2812 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,288 psi | 85% | 2808 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,811 psi | 89% | 2851 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2838 fps | 97.6% |
| Norma 201 | <<locked>> | 90% | 56,405 psi | 88% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,797 psi | 89% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,839 psi | 86% | 2858 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,069 psi | 82% | 2861 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 55,419 psi | 87% | 2884 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,908 psi | 80% | 2851 fps | 97.7% |
| Ramshot TAC | <<locked>> | 88% | 57,450 psi | 90% | 2854 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,956 psi | 89% | 2874 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,404 psi | 85% | 2785 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,505 psi | 56% | 1755 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,376 psi | 88% | 2812 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,276 psi | 90% | 2861 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,057 psi | 88% | 2936 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,579 psi | 87% | 2972 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,243 psi | 82% | 2890 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2920 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 88% | 56,942 psi | 89% | 2802 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,550 psi | 89% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,042 psi | 86% | 2851 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,999 psi | 88% | 2831 fps | 97.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,811 psi | 89% | 2851 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 90% | 57,305 psi | 90% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,288 psi | 85% | 2808 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2838 fps | 97.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,999 psi | 88% | 2785 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,348 psi | 90% | 2917 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,014 psi | 88% | 2762 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,564 psi | 87% | 2828 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,130 psi | 88% | 2851 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,752 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,969 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 2808 fps | 97.8% |
| Somchem S321 | <<locked>> | 84% | 54,433 psi | 85% | 2815 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 57,464 psi | 90% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,274 psi | 87% | 2822 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 55,564 psi | 87% | 2851 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2808 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,621 psi | 86% | 2684 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,955 psi | 86% | 2707 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,217 psi | 88% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 57,566 psi | 90% | 2805 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,406 psi | 90% | 2831 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,694 psi | 86% | 2858 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 88% | 57,609 psi | 90% | 2835 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,695 psi | 87% | 2805 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2864 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2677 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2841 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 57,479 psi | 90% | 2884 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2927 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,995 psi | 50% | 2569 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,130 psi | 88% | 2861 fps | 100% |
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% | 45,687 psi | 72% | 2595 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,922 psi | 78% | 2707 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,768 psi | 59% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,005 psi | 71% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,792 psi | 78% | 2690 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,752 psi | 56% | 2500 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,214 psi | 54% | 2523 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 54,244 psi | 85% | 2677 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,974 psi | 66% | 2618 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,679 psi | 56% | 2467 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,106 psi | 69% | 2628 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,048 psi | 69% | 2621 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,561 psi | 81% | 2835 fps | 99.9% |
| Alliant Power Pro 2000-MR | 50.3 gr | 80% | 38,058 psi | 60% | 2638 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,940 psi | 55% | 2487 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,343 psi | 80% | 2687 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,739 psi | 59% | 2549 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,143 psi | 55% | 2546 fps | 95.4% |
| Alliant Reloder-17 | 49.5 gr | 80% | 30,124 psi | 47% | 2441 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,778 psi | 50% | 2487 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,318 psi | 58% | 2680 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,359 psi | 84% | 2671 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,147 psi | 64% | 2618 fps | 97.4% |
| Bofors RP3 | <<locked>> | 80% | 34,330 psi | 54% | 2484 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 49,124 psi | 77% | 2723 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,006 psi | 72% | 2625 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,641 psi | 67% | 2648 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,239 psi | 74% | 2792 fps | 99% |
| Hodgdon H322 | <<locked>> | 80% | 50,705 psi | 79% | 2730 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,358 psi | 80% | 2753 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,826 psi | 59% | 2543 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 45,701 psi | 72% | 2753 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 94% | 50,198 psi | 79% | 2779 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,337 psi | 66% | 2628 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,008 psi | 47% | 2385 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,247 psi | 60% | 2595 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 49,545 psi | 78% | 2838 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 41% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,872 psi | 64% | 2585 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 41,756 psi | 65% | 2628 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,391 psi | 59% | 2500 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,658 psi | 72% | 2635 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,822 psi | 81% | 2651 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,284 psi | 77% | 2749 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,368 psi | 71% | 2657 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 35,766 psi | 56% | 2539 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 38,624 psi | 61% | 2579 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 44,106 psi | 69% | 2628 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 49,516 psi | 78% | 2710 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,596 psi | 64% | 2595 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,279 psi | 66% | 2559 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 37,130 psi | 58% | 2507 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,146 psi | 61% | 2546 fps | 95.1% |
| Lovex S070 | <<locked>> | 94% | 44,904 psi | 70% | 2677 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,017 psi | 64% | 2572 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,263 psi | 65% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,086 psi | 58% | 2536 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,027 psi | 55% | 2533 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 36,622 psi | 57% | 2549 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 41,887 psi | 66% | 2684 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,019 psi | 69% | 2631 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,279 psi | 68% | 2651 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,732 psi | 75% | 2680 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,223 psi | 41% | 1565 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,487 psi | 78% | 2713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,005 psi | 69% | 2641 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,305 psi | 62% | 2644 fps | 97.4% |
| ReloadSwiss RS 60 | 49.5 gr | 80% | 32,140 psi | 50% | 2510 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,680 psi | 57% | 2598 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,856 psi | 62% | 2671 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 44,614 psi | 70% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,957 psi | 61% | 2523 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,285 psi | 51% | 2428 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 94% | 49,124 psi | 77% | 2723 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,146 psi | 61% | 2546 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,596 psi | 64% | 2595 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,130 psi | 58% | 2507 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 44,904 psi | 70% | 2677 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,431 psi | 82% | 2733 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,388 psi | 52% | 2477 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,344 psi | 82% | 2710 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,974 psi | 66% | 2602 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,422 psi | 63% | 2585 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,525 psi | 67% | 2533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,143 psi | 55% | 2398 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,121 psi | 69% | 2595 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,587 psi | 75% | 2710 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,134 psi | 66% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,901 psi | 66% | 2602 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 33,359 psi | 52% | 2441 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 27,282 psi | 43% | 2365 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 48,167 psi | 75% | 2595 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,844 psi | 67% | 2530 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,232 psi | 60% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,131 psi | 61% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,676 psi | 50% | 2379 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,622 psi | 57% | 2536 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 44,063 psi | 69% | 2625 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,521 psi | 59% | 2507 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,027 psi | 56% | 2536 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 96% | 33,895 psi | 53% | 2562 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,226 psi | 47% | 2352 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,540 psi | 68% | 2667 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 45,963 psi | 72% | 2756 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,023 psi | 47% | 2503 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,958 psi | 63% | 2592 fps | 98.6% |
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 106 powders for .300 RCM loaded with the .308 | 167gr | MRR Green Hunting. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,713 fps to 3,002 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 167.0 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, Alliant Reloder-17 rank at the top here: for .300 RCM with the .308 | 167gr | MRR Green Hunting 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.