Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:150 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:1:15.5
Load data in caliber .300 RCM with .308 | 150gr | Sierra Pro-Hunter bullet and 103 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% | 55,463 psi | 87% | 2900 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,450 psi | 90% | 2976 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,116 psi | 90% | 2966 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,796 psi | 87% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,971 psi | 89% | 2956 fps | 96.2% |
| Accurate 4064 | <<locked>> | 94% | 57,072 psi | 89% | 3012 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,881 psi | 83% | 3028 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 57,508 psi | 90% | 2887 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,491 psi | 85% | 2995 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 55,361 psi | 87% | 2989 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,029 psi | 89% | 3002 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 57,653 psi | 90% | 2979 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,216 psi | 87% | 3058 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,809 psi | 84% | 3107 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,187 psi | 86% | 3015 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,998 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,869 psi | 88% | 3035 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 3035 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,028 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,550 psi | 57% | 2743 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,884 psi | 89% | 2881 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,230 psi | 85% | 3005 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 55,782 psi | 87% | 3031 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,043 psi | 88% | 2989 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,448 psi | 87% | 2933 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,376 psi | 88% | 3031 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,389 psi | 85% | 3071 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 57,725 psi | 90% | 2995 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,085 psi | 86% | 2969 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,188 psi | 90% | 3045 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3084 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 98% | 57,276 psi | 90% | 3048 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 88% | 55,027 psi | 86% | 3005 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,456 psi | 74% | 2910 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,201 psi | 85% | 3038 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 98% | 53,650 psi | 84% | 3058 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 55% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,405 psi | 88% | 3012 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 54,592 psi | 86% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,940 psi | 86% | 2972 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,245 psi | 87% | 2949 fps | 96.7% |
| IMR 4198 | <<locked>> | 82% | 55,085 psi | 86% | 2864 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,694 psi | 86% | 2969 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,096 psi | 79% | 2963 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 57,290 psi | 90% | 3068 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 88% | 57,029 psi | 89% | 3002 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,406 psi | 90% | 2986 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,027 psi | 85% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,609 psi | 90% | 2976 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,520 psi | 85% | 2972 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3015 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2999 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 56,608 psi | 89% | 2992 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,101 psi | 89% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,027 psi | 86% | 3022 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 52,359 psi | 82% | 3022 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 55,666 psi | 87% | 3048 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,256 psi | 80% | 3009 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 57,537 psi | 90% | 3015 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,072 psi | 89% | 3038 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,491 psi | 85% | 2946 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,505 psi | 56% | 1877 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,565 psi | 89% | 2982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,319 psi | 90% | 3018 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,260 psi | 88% | 3107 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,869 psi | 88% | 3140 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,721 psi | 83% | 3054 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3074 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 88% | 57,551 psi | 90% | 2976 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,985 psi | 89% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,593 psi | 87% | 3018 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 56,043 psi | 88% | 2989 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3015 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,027 psi | 85% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,520 psi | 85% | 2972 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2999 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,333 psi | 88% | 2953 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,508 psi | 90% | 3084 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,840 psi | 88% | 2930 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,869 psi | 88% | 2992 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,405 psi | 88% | 3018 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,027 psi | 86% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,795 psi | 86% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,244 psi | 85% | 2910 fps | 96.5% |
| Somchem S321 | <<locked>> | 84% | 54,781 psi | 86% | 2982 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 57,580 psi | 90% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,361 psi | 87% | 2986 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 55,912 psi | 88% | 3015 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,644 psi | 73% | 2966 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 54,708 psi | 86% | 2851 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,143 psi | 86% | 2871 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,666 psi | 89% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,099 psi | 85% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,537 psi | 90% | 2995 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3015 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 57,725 psi | 90% | 3002 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,999 psi | 88% | 2969 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3022 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,276 psi | 62% | 2822 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,680 psi | 87% | 2999 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 57,493 psi | 90% | 3051 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,507 psi | 89% | 3087 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,188 psi | 88% | 3025 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% | 46,079 psi | 72% | 2759 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,357 psi | 79% | 2871 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,682 psi | 61% | 2671 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,411 psi | 71% | 2822 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 53,345 psi | 84% | 2900 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,579 psi | 57% | 2657 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 37,246 psi | 58% | 2730 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 54,143 psi | 85% | 2838 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,395 psi | 66% | 2772 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,027 psi | 56% | 2612 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,454 psi | 70% | 2789 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 44,164 psi | 69% | 2782 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,851 psi | 81% | 3002 fps | 99.7% |
| Alliant Power Pro 2000-MR | 53.6 gr | 80% | 38,232 psi | 60% | 2782 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,346 psi | 55% | 2631 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,677 psi | 81% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,189 psi | 60% | 2700 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,681 psi | 59% | 2746 fps | 95.3% |
| Alliant Reloder-17 | 54.1 gr | 82% | 32,605 psi | 51% | 2638 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,258 psi | 54% | 2684 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,519 psi | 84% | 2835 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,423 psi | 65% | 2769 fps | 96.6% |
| Bofors RP3 | <<locked>> | 80% | 34,882 psi | 55% | 2635 fps | 97% |
| Bofors RP7 | <<locked>> | 96% | 52,692 psi | 83% | 2933 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,224 psi | 72% | 2779 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,873 psi | 67% | 2802 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,253 psi | 74% | 2946 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 50,691 psi | 79% | 2894 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,605 psi | 81% | 2917 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 40,944 psi | 64% | 2749 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 96% | 49,139 psi | 77% | 2963 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 53,679 psi | 84% | 2989 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,786 psi | 67% | 2785 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,416 psi | 51% | 2579 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,551 psi | 60% | 2746 fps | 98% |
| Hodgdon Superformance | <<locked>> | 96% | 49,922 psi | 78% | 2989 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 41% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,988 psi | 64% | 2733 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 42,105 psi | 66% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,797 psi | 59% | 2648 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,834 psi | 77% | 2838 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,011 psi | 82% | 2822 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,370 psi | 76% | 2861 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 38,508 psi | 60% | 2740 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 39,117 psi | 61% | 2733 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 80% | 44,454 psi | 70% | 2789 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 50,053 psi | 78% | 2874 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,191 psi | 65% | 2753 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 42,612 psi | 67% | 2713 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 37,623 psi | 59% | 2654 fps | 98% |
| Lovex S065 | <<locked>> | 90% | 42,061 psi | 66% | 2746 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 48,225 psi | 76% | 2884 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,568 psi | 65% | 2730 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 41,597 psi | 65% | 2736 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,579 psi | 59% | 2687 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 37,623 psi | 59% | 2733 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,854 psi | 58% | 2694 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 96% | 44,962 psi | 70% | 2890 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,324 psi | 69% | 2782 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,613 psi | 68% | 2805 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,834 psi | 75% | 2835 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 41% | 1680 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,632 psi | 78% | 2874 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,253 psi | 74% | 2848 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,668 psi | 62% | 2799 fps | 96.7% |
| ReloadSwiss RS 60 | 52.8 gr | 80% | 32,547 psi | 51% | 2651 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 39,871 psi | 62% | 2808 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,076 psi | 68% | 2881 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 45,252 psi | 71% | 2776 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,378 psi | 62% | 2674 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,808 psi | 51% | 2572 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 96% | 52,692 psi | 83% | 2933 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,061 psi | 66% | 2746 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,191 psi | 65% | 2753 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 37,623 psi | 59% | 2654 fps | 98% |
| Shooters World SW4350 | <<locked>> | 96% | 48,225 psi | 76% | 2884 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,475 psi | 82% | 2894 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,852 psi | 53% | 2621 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,446 psi | 82% | 2881 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,395 psi | 66% | 2753 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,857 psi | 64% | 2736 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,888 psi | 67% | 2687 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,520 psi | 56% | 2543 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,587 psi | 75% | 2802 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,935 psi | 75% | 2867 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 42,598 psi | 67% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,192 psi | 66% | 2753 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 33,881 psi | 53% | 2585 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 29,559 psi | 46% | 2559 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,472 psi | 76% | 2759 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,134 psi | 68% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,638 psi | 61% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,392 psi | 62% | 2671 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 32,097 psi | 50% | 2520 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 90% | 39,392 psi | 62% | 2733 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 44,382 psi | 70% | 2779 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 37,869 psi | 59% | 2654 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 38,885 psi | 61% | 2740 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 98% | 36,869 psi | 58% | 2769 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,663 psi | 51% | 2543 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,758 psi | 69% | 2825 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 49,400 psi | 77% | 2969 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,190 psi | 63% | 2740 fps | 98% |
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 103 powders for .300 RCM loaded with the .308 | 150gr | Sierra Pro-Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,140 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:15.5 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 | 150gr | Sierra Pro-Hunter 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.