Load Specifications
Bullet:.308 | 154gr | Hammer HHT
Bullet Manufacturer:Hammer
Bullet Weight:154 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:1:11.5
Load data in caliber .300 RCM with .308 | 154gr | Hammer HHT bullet and 102 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 Ramshot Big Game.
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% | 55,347 psi | 87% | 2848 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 57,450 psi | 90% | 2923 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,289 psi | 88% | 2910 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,651 psi | 87% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 57,246 psi | 90% | 2904 fps | 96% |
| Accurate 4064 | <<locked>> | 96% | 55,912 psi | 88% | 2953 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 2907 fps | 98% |
| Accurate LT-30 | <<locked>> | 82% | 54,853 psi | 86% | 2795 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,303 psi | 87% | 2822 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,404 psi | 85% | 2943 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 55,521 psi | 87% | 2940 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 55,883 psi | 88% | 2920 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 57,174 psi | 90% | 2949 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 57,479 psi | 90% | 2927 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,390 psi | 87% | 3009 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,172 psi | 85% | 3054 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,071 psi | 86% | 2959 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,187 psi | 86% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,738 psi | 87% | 2982 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 2920 fps | 98.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3077 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,128 psi | 85% | 2789 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,433 psi | 85% | 2956 fps | 99% |
| Bofors RP3 | <<locked>> | 96% | 55,376 psi | 87% | 2976 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 2930 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,970 psi | 88% | 2887 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,333 psi | 88% | 2979 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,737 psi | 86% | 3025 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 54,331 psi | 85% | 2897 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,637 psi | 87% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,855 psi | 89% | 2986 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2966 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 90% | 54,882 psi | 86% | 2953 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,903 psi | 69% | 2795 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,882 psi | 84% | 2982 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 54% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,434 psi | 88% | 2956 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 54,288 psi | 85% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,100 psi | 86% | 2923 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,477 psi | 87% | 2897 fps | 96.6% |
| IMR 4198 | <<locked>> | 84% | 55,361 psi | 87% | 2815 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,897 psi | 86% | 2920 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,340 psi | 73% | 2854 fps | 97.7% |
| IMR 4895 | <<locked>> | 94% | 57,174 psi | 90% | 3015 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 57,174 psi | 90% | 2949 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 57,609 psi | 90% | 2936 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 57,522 psi | 90% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,636 psi | 86% | 2874 fps | 99.6% |
| Lovex S062 | <<locked>> | 96% | 57,725 psi | 90% | 2966 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2907 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 2881 fps | 95.9% |
| Norma 201 | <<locked>> | 92% | 56,376 psi | 88% | 2936 fps | 100% |
| Norma 202 | <<locked>> | 92% | 57,029 psi | 89% | 2943 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,882 psi | 86% | 2969 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 48,312 psi | 76% | 2904 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 94% | 55,492 psi | 87% | 2995 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2890 fps | 96% |
| Ramshot TAC | <<locked>> | 88% | 54,244 psi | 85% | 2910 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 57,305 psi | 90% | 2989 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,984 psi | 86% | 2900 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,954 psi | 55% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 57,087 psi | 89% | 2936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 57,667 psi | 90% | 2969 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,086 psi | 88% | 3051 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,666 psi | 87% | 3084 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,370 psi | 76% | 2933 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,284 psi | 77% | 2953 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 90% | 57,319 psi | 90% | 2923 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,840 psi | 89% | 2933 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,868 psi | 86% | 2959 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 2930 fps | 96.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2907 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 57,522 psi | 90% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 57,725 psi | 90% | 2966 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 2881 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,782 psi | 89% | 2904 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,043 psi | 88% | 2927 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 57,159 psi | 90% | 3025 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,304 psi | 88% | 2881 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,970 psi | 88% | 2940 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,521 psi | 89% | 2966 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,114 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,085 psi | 86% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,302 psi | 85% | 2858 fps | 96.3% |
| Somchem S321 | <<locked>> | 86% | 54,839 psi | 86% | 2933 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 57,595 psi | 90% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,608 psi | 87% | 2936 fps | 99.6% |
| Somchem S355 | <<locked>> | 98% | 55,535 psi | 87% | 2959 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,873 psi | 67% | 2848 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 86% | 54,998 psi | 86% | 2805 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,158 psi | 86% | 2822 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,333 psi | 88% | 2904 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,740 psi | 90% | 2920 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 2943 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,865 psi | 80% | 2904 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 88% | 54,244 psi | 85% | 2897 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 55,854 psi | 88% | 2917 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 2907 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,982 psi | 81% | 2890 fps | 99.7% |
| Winchester 748 | <<locked>> | 90% | 57,450 psi | 90% | 2999 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2966 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,434 psi | 88% | 2976 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% | 43,004 psi | 67% | 2661 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,847 psi | 73% | 2766 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,027 psi | 55% | 2559 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,003 psi | 66% | 2717 fps | 99.7% |
| Accurate 2700 | <<locked>> | 92% | 53,650 psi | 84% | 2851 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 33,156 psi | 52% | 2543 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 39,088 psi | 61% | 2730 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 51,692 psi | 81% | 2749 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,098 psi | 82% | 2776 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,479 psi | 62% | 2664 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 35,882 psi | 56% | 2566 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 52,243 psi | 82% | 2867 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,568 psi | 65% | 2684 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 40,988 psi | 64% | 2687 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,327 psi | 76% | 2890 fps | 99.3% |
| Alliant Power Pro 2000-MR | 51.7 gr | 82% | 38,290 psi | 60% | 2736 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,619 psi | 51% | 2526 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,530 psi | 76% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,302 psi | 55% | 2589 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 37,318 psi | 58% | 2687 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,490 psi | 54% | 2648 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,676 psi | 79% | 2743 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,493 psi | 60% | 2661 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 31,836 psi | 50% | 2520 fps | 95.8% |
| Bofors RP7 | <<locked>> | 98% | 52,634 psi | 82% | 2881 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,584 psi | 68% | 2684 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,827 psi | 62% | 2697 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,961 psi | 69% | 2838 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 47,718 psi | 75% | 2795 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,573 psi | 76% | 2818 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,654 psi | 64% | 2700 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 98% | 48,849 psi | 77% | 2907 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 39,755 psi | 62% | 2677 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,881 psi | 53% | 2575 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,665 psi | 56% | 2638 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,614 psi | 40% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,464 psi | 60% | 2635 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 38,870 psi | 61% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,186 psi | 55% | 2543 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,081 psi | 77% | 2792 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 49,211 psi | 77% | 2726 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,517 psi | 81% | 2864 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 37,724 psi | 59% | 2680 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 36,114 psi | 57% | 2621 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 41,568 psi | 65% | 2684 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 46,717 psi | 73% | 2772 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 38,000 psi | 60% | 2644 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 40,045 psi | 63% | 2612 fps | 97.3% |
| Lovex S062 | <<locked>> | 80% | 34,780 psi | 55% | 2549 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 44,353 psi | 70% | 2746 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 47,572 psi | 75% | 2822 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 38,580 psi | 60% | 2621 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 38,711 psi | 61% | 2635 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 34,679 psi | 54% | 2579 fps | 95.7% |
| Norma URP | <<locked>> | 94% | 39,668 psi | 62% | 2733 fps | 95.7% |
| Ramshot Big Game | 50.4 gr | 80% | 34,214 psi | 54% | 2585 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 98% | 44,454 psi | 70% | 2828 fps | 95% |
| Ramshot TAC | <<locked>> | 82% | 44,411 psi | 70% | 2736 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,814 psi | 64% | 2700 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,063 psi | 71% | 2733 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,991 psi | 41% | 1631 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,673 psi | 73% | 2776 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,282 psi | 74% | 2799 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,680 psi | 57% | 2687 fps | 95.7% |
| ReloadSwiss RS 60 | 49.6 gr | 80% | 30,052 psi | 47% | 2536 fps | 96.5% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 39,218 psi | 61% | 2749 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,902 psi | 67% | 2825 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 42,076 psi | 66% | 2671 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 36,608 psi | 57% | 2569 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 32,126 psi | 50% | 2520 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 98% | 52,634 psi | 82% | 2881 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 44,353 psi | 70% | 2746 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,000 psi | 60% | 2644 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 34,780 psi | 55% | 2549 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 47,572 psi | 75% | 2822 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,472 psi | 78% | 2792 fps | 99.5% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,591 psi | 82% | 2877 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,533 psi | 53% | 2575 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,429 psi | 77% | 2782 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,494 psi | 62% | 2644 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,174 psi | 60% | 2635 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,205 psi | 63% | 2589 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,025 psi | 52% | 2448 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 50,662 psi | 79% | 2805 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 44,686 psi | 70% | 2762 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 39,798 psi | 62% | 2595 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 39,204 psi | 61% | 2648 fps | 97% |
| Somchem S355 | <<locked>> | 82% | 33,141 psi | 52% | 2530 fps | 95.7% |
| Somchem S365 | <<locked>> | 88% | 28,964 psi | 45% | 2503 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 45,629 psi | 72% | 2667 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,437 psi | 63% | 2592 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,665 psi | 56% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,680 psi | 57% | 2572 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 29,515 psi | 46% | 2415 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 92% | 39,015 psi | 61% | 2680 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 41,437 psi | 65% | 2677 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 35,157 psi | 55% | 2552 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 40,828 psi | 64% | 2736 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,372 psi | 51% | 2493 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 40,654 psi | 64% | 2720 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 48,849 psi | 77% | 2907 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,318 psi | 58% | 2635 fps | 97.2% |
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 102 powders for .300 RCM loaded with the .308 | 154gr | Hammer HHT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,084 fps. Accurate 4350 gives the best case fill at 100 %, and 102 of the 102 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 154.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, Ramshot Big Game rank at the top here: for .300 RCM with the .308 | 154gr | Hammer HHT 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.