Load Specifications
Bullet Manufacturer:Reichenberg
Bullet Weight:170 gr
Bullet Diameter:0.309"
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 .309 | 170gr | Reichenberg HDB Universal bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 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% | 54,447 psi | 85% | 2690 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,333 psi | 88% | 2762 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,477 psi | 87% | 2749 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,521 psi | 89% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 56,942 psi | 89% | 2756 fps | 96.9% |
| Accurate 4064 | <<locked>> | 94% | 57,145 psi | 90% | 2808 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 2835 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 82% | 56,985 psi | 89% | 2677 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,421 psi | 90% | 2707 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,766 psi | 86% | 2797 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,564 psi | 87% | 2792 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,377 psi | 90% | 2799 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,273 psi | 85% | 2726 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,273 psi | 85% | 2841 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,157 psi | 85% | 2909 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,317 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,434 psi | 87% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,217 psi | 88% | 2839 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 2838 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,927 psi | 88% | 2932 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,883 psi | 58% | 2576 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,437 psi | 63% | 2717 fps | 96.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,174 psi | 90% | 2682 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,389 psi | 85% | 2810 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 55,999 psi | 88% | 2831 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,406 psi | 90% | 2799 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,796 psi | 87% | 2736 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,419 psi | 87% | 2818 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 57,653 psi | 90% | 2920 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 86% | 57,334 psi | 90% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,276 psi | 90% | 2844 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 96% | 54,273 psi | 85% | 2857 fps | 97.5% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2805 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 55,347 psi | 87% | 2809 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,703 psi | 75% | 2721 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,797 psi | 89% | 2877 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,563 psi | 84% | 2866 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 56% | 1685 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 57,551 psi | 90% | 2828 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 56,724 psi | 89% | 2812 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 57,595 psi | 90% | 2812 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 96% | 57,232 psi | 90% | 2784 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 55,477 psi | 87% | 2662 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,736 psi | 83% | 2766 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,159 psi | 90% | 2815 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,672 psi | 72% | 2683 fps | 98.1% |
| IMR 4895 | <<locked>> | 92% | 57,638 psi | 90% | 2868 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,377 psi | 90% | 2799 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,751 psi | 84% | 2732 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,186 psi | 85% | 2773 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,534 psi | 85% | 2726 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 54,766 psi | 86% | 2772 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,550 psi | 87% | 2771 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2801 fps | 97.6% |
| Norma 201 | <<locked>> | 90% | 56,884 psi | 89% | 2792 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,464 psi | 90% | 2794 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,376 psi | 87% | 2826 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2823 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 55,825 psi | 87% | 2851 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,504 psi | 82% | 2818 fps | 97.7% |
| Ramshot TAC | <<locked>> | 88% | 57,725 psi | 90% | 2818 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,159 psi | 90% | 2837 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,752 psi | 86% | 2750 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,926 psi | 56% | 1726 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,797 psi | 89% | 2779 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,711 psi | 90% | 2826 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,507 psi | 89% | 2903 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,724 psi | 87% | 2933 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,272 psi | 83% | 2858 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 2883 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 88% | 57,711 psi | 90% | 2769 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,392 psi | 90% | 2789 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,854 psi | 88% | 2821 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,406 psi | 90% | 2799 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,550 psi | 87% | 2771 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,186 psi | 85% | 2773 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,766 psi | 86% | 2772 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2789 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,594 psi | 89% | 2753 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,435 psi | 90% | 2880 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,288 psi | 87% | 2717 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,956 psi | 88% | 2794 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,579 psi | 89% | 2818 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,143 psi | 86% | 2685 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,201 psi | 87% | 2683 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,389 psi | 85% | 2723 fps | 97.2% |
| Somchem S321 | <<locked>> | 84% | 54,882 psi | 86% | 2782 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,592 psi | 86% | 2686 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,535 psi | 87% | 2788 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 56,231 psi | 88% | 2820 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,224 psi | 74% | 2774 fps | 100% |
| Unknown powder | <<locked>> | 98% | 54,375 psi | 85% | 2833 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 86% | 57,174 psi | 90% | 2680 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,534 psi | 85% | 2665 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,564 psi | 87% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,942 psi | 89% | 2760 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 2750 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,288 psi | 85% | 2808 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 86% | 57,116 psi | 90% | 2806 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,652 psi | 89% | 2788 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,288 psi | 85% | 2854 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,089 psi | 63% | 2649 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,796 psi | 87% | 2805 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,491 psi | 85% | 2804 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,273 psi | 85% | 2857 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,996 psi | 52% | 2554 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,230 psi | 85% | 2796 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% | 45,020 psi | 71% | 2556 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,211 psi | 77% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,159 psi | 58% | 2467 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,786 psi | 67% | 2605 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 49,850 psi | 78% | 2651 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,825 psi | 58% | 2480 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,099 psi | 55% | 2507 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 53,606 psi | 84% | 2635 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,027 psi | 85% | 2657 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,641 psi | 67% | 2591 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 36,172 psi | 57% | 2441 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,657 psi | 70% | 2602 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,585 psi | 70% | 2592 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,894 psi | 80% | 2789 fps | 99.9% |
| Alliant Power Pro 2000-MR | 48.9 gr | 80% | 38,580 psi | 60% | 2612 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,607 psi | 56% | 2464 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,127 psi | 82% | 2659 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,392 psi | 60% | 2525 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,520 psi | 56% | 2518 fps | 95.5% |
| Alliant Reloder-17 | 48.1 gr | 80% | 30,719 psi | 48% | 2420 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,443 psi | 48% | 2415 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,753 psi | 59% | 2655 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,737 psi | 84% | 2638 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,684 psi | 65% | 2593 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 35,201 psi | 55% | 2468 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 46,760 psi | 73% | 2642 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,514 psi | 73% | 2593 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,047 psi | 66% | 2605 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,311 psi | 73% | 2743 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 47,253 psi | 74% | 2638 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,158 psi | 57% | 2468 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 90% | 44,338 psi | 69% | 2688 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 98% | 50,807 psi | 80% | 2756 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,989 psi | 67% | 2603 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,603 psi | 48% | 2366 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,505 psi | 56% | 2507 fps | 98% |
| Hodgdon Superformance | <<locked>> | 94% | 46,586 psi | 73% | 2745 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 41% | 1507 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,260 psi | 58% | 2480 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 38,870 psi | 61% | 2537 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,433 psi | 56% | 2418 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 45,136 psi | 71% | 2584 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 52,127 psi | 82% | 2616 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,804 psi | 73% | 2667 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,715 psi | 70% | 2612 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 34,722 psi | 54% | 2481 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,320 psi | 62% | 2556 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 44,657 psi | 70% | 2602 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,314 psi | 79% | 2683 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,524 psi | 65% | 2573 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,743 psi | 67% | 2530 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 37,811 psi | 59% | 2481 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,871 psi | 62% | 2522 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 45,368 psi | 71% | 2647 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,771 psi | 65% | 2547 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 41,872 psi | 66% | 2555 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,782 psi | 59% | 2515 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 35,520 psi | 56% | 2508 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,188 psi | 58% | 2524 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 94% | 42,337 psi | 66% | 2656 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 44,570 psi | 70% | 2604 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,830 psi | 69% | 2623 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,240 psi | 76% | 2648 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 42% | 1544 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,067 psi | 78% | 2683 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,684 psi | 65% | 2557 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,987 psi | 63% | 2622 fps | 97.6% |
| ReloadSwiss RS 60 | 48.1 gr | 80% | 32,721 psi | 51% | 2488 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,376 psi | 59% | 2579 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,379 psi | 63% | 2644 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 45,672 psi | 72% | 2590 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,639 psi | 62% | 2498 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 33,141 psi | 52% | 2413 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 46,760 psi | 73% | 2642 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,871 psi | 62% | 2522 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,524 psi | 65% | 2573 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,811 psi | 59% | 2481 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 94% | 44,063 psi | 69% | 2631 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,895 psi | 83% | 2701 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,113 psi | 53% | 2459 fps | 96.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,880 psi | 81% | 2671 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,627 psi | 67% | 2574 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,118 psi | 64% | 2562 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,250 psi | 68% | 2506 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,824 psi | 56% | 2376 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,773 psi | 70% | 2571 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 48,196 psi | 76% | 2680 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,801 psi | 67% | 2507 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,496 psi | 67% | 2576 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 34,084 psi | 53% | 2420 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 27,949 psi | 44% | 2351 fps | 95.9% |
| Unknown powder | <<locked>> | 88% | 38,841 psi | 61% | 2569 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 47,950 psi | 75% | 2554 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,698 psi | 64% | 2456 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,782 psi | 59% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,218 psi | 61% | 2486 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 29,080 psi | 46% | 2280 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 86% | 36,289 psi | 57% | 2488 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 46,876 psi | 73% | 2651 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,827 psi | 61% | 2503 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 36,767 psi | 58% | 2533 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 32,416 psi | 51% | 2489 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,734 psi | 48% | 2333 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 47,630 psi | 75% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,338 psi | 69% | 2688 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,603 psi | 48% | 2487 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,502 psi | 79% | 2740 fps | 99.8% |
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 107 powders for .300 RCM loaded with the .309 | 170gr | Reichenberg HDB Universal. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,933 fps; across all powders the maximum-charge window runs from 1,685 fps to 2,933 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.309" 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 RCM with the .309 | 170gr | Reichenberg HDB Universal 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.