Load Specifications
Load data in caliber .300 RCM with .308 | 150gr | Alaska Bullet Works Kodiak SP SPBC bullet and 104 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.
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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% | 55,622 psi | 87% | 2904 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,595 psi | 90% | 2979 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,551 psi | 90% | 2972 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,956 psi | 88% | 2992 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,363 psi | 90% | 2966 fps | 96.3% |
| Accurate 4064 | <<locked>> | 94% | 57,232 psi | 90% | 3015 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,272 psi | 83% | 3038 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 82% | 57,667 psi | 90% | 2890 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,636 psi | 86% | 2999 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 55,753 psi | 87% | 2995 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,203 psi | 90% | 3005 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,230 psi | 85% | 2933 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,390 psi | 87% | 3061 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,172 psi | 85% | 3114 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,303 psi | 87% | 3018 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,187 psi | 86% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,985 psi | 88% | 3038 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 3041 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,362 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,593 psi | 57% | 2746 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,305 psi | 90% | 2887 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,360 psi | 85% | 3009 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 56,202 psi | 88% | 3038 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,405 psi | 88% | 2995 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,564 psi | 87% | 2936 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,521 psi | 89% | 3035 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,868 psi | 86% | 3081 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 82% | 54,418 psi | 85% | 2953 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,550 psi | 87% | 2976 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,305 psi | 90% | 3048 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3091 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 98% | 57,377 psi | 90% | 3051 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,143 psi | 86% | 3012 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,572 psi | 75% | 2913 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,346 psi | 85% | 3041 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,983 psi | 85% | 3064 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,172 psi | 55% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,565 psi | 89% | 3015 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 54,781 psi | 86% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,027 psi | 86% | 2979 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,303 psi | 87% | 2953 fps | 96.8% |
| IMR 4198 | <<locked>> | 82% | 55,303 psi | 87% | 2871 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,084 psi | 83% | 2963 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,795 psi | 86% | 2972 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 2972 fps | 98.6% |
| IMR 4895 | <<locked>> | 92% | 57,406 psi | 90% | 3071 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 57,203 psi | 90% | 3005 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,911 psi | 84% | 2936 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,157 psi | 85% | 2976 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,711 psi | 90% | 2976 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,911 psi | 86% | 2979 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3022 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2999 fps | 97% |
| Norma 201 | <<locked>> | 90% | 56,739 psi | 89% | 2995 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,508 psi | 90% | 3002 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,143 psi | 86% | 3025 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 52,431 psi | 82% | 3025 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 55,796 psi | 87% | 3054 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,590 psi | 81% | 3015 fps | 97.1% |
| Ramshot TAC | <<locked>> | 86% | 54,157 psi | 85% | 2963 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,203 psi | 90% | 3041 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,911 psi | 86% | 2953 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,549 psi | 56% | 1877 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,695 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,711 psi | 90% | 3028 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,420 psi | 88% | 3110 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,912 psi | 88% | 3146 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3054 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3081 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 88% | 57,682 psi | 90% | 2979 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,392 psi | 90% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,767 psi | 87% | 3022 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 56,405 psi | 88% | 2995 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3022 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,157 psi | 85% | 2976 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,911 psi | 86% | 2979 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2999 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,507 psi | 89% | 2956 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,940 psi | 85% | 3031 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,043 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,217 psi | 88% | 2999 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,507 psi | 89% | 3022 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,187 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,245 psi | 87% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,607 psi | 86% | 2920 fps | 96.6% |
| Somchem S321 | <<locked>> | 84% | 54,940 psi | 86% | 2986 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 57,667 psi | 90% | 2930 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,492 psi | 87% | 2989 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 56,275 psi | 88% | 3025 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2976 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 54,911 psi | 86% | 2854 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,303 psi | 87% | 2877 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,869 psi | 89% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,520 psi | 85% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,230 psi | 85% | 2949 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 3025 fps | 99% |
| Vihtavuori N530 | <<locked>> | 86% | 54,157 psi | 85% | 2949 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,086 psi | 88% | 2972 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3031 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,639 psi | 62% | 2831 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3005 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 57,653 psi | 90% | 3054 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3091 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,608 psi | 89% | 3031 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% | 46,253 psi | 72% | 2762 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,488 psi | 79% | 2874 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,856 psi | 61% | 2674 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,542 psi | 71% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,751 psi | 84% | 2907 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,738 psi | 58% | 2661 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 37,608 psi | 59% | 2736 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 54,317 psi | 85% | 2841 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,525 psi | 67% | 2779 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 36,158 psi | 57% | 2618 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,599 psi | 70% | 2792 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 44,367 psi | 70% | 2785 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,040 psi | 82% | 3009 fps | 99.7% |
| Alliant Power Pro 2000-MR | 53.9 gr | 80% | 38,551 psi | 60% | 2792 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,476 psi | 56% | 2635 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,880 psi | 81% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,334 psi | 60% | 2703 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,826 psi | 59% | 2749 fps | 95.4% |
| Alliant Reloder-17 | 54.4 gr | 82% | 32,880 psi | 52% | 2648 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,505 psi | 54% | 2694 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,635 psi | 84% | 2838 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,582 psi | 65% | 2776 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 35,070 psi | 55% | 2638 fps | 97% |
| Bofors RP7 | <<locked>> | 96% | 53,084 psi | 83% | 2943 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,369 psi | 73% | 2785 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,250 psi | 68% | 2808 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,442 psi | 74% | 2953 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 50,865 psi | 80% | 2897 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,764 psi | 81% | 2920 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,609 psi | 61% | 2700 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 49,516 psi | 78% | 2972 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 53,780 psi | 84% | 2992 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,931 psi | 67% | 2789 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,532 psi | 51% | 2582 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,696 psi | 61% | 2749 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 96% | 50,169 psi | 79% | 2999 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 41% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,133 psi | 64% | 2736 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 42,293 psi | 66% | 2792 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,942 psi | 59% | 2654 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,921 psi | 77% | 2844 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,938 psi | 81% | 2822 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,763 psi | 78% | 2907 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,675 psi | 76% | 2867 fps | 95.2% |
| IMR 4831 | <<locked>> | 92% | 38,827 psi | 61% | 2746 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 39,262 psi | 62% | 2736 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 44,599 psi | 70% | 2792 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 50,198 psi | 79% | 2877 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,379 psi | 65% | 2756 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 42,757 psi | 67% | 2717 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 37,768 psi | 59% | 2661 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 42,177 psi | 66% | 2749 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 48,298 psi | 76% | 2887 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,713 psi | 65% | 2733 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 41,756 psi | 65% | 2743 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,724 psi | 59% | 2694 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 37,942 psi | 59% | 2740 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,144 psi | 58% | 2700 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 45,252 psi | 71% | 2897 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 44,411 psi | 70% | 2785 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,787 psi | 69% | 2808 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,196 psi | 76% | 2841 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 42% | 1683 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,053 psi | 78% | 2884 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,572 psi | 75% | 2854 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,842 psi | 62% | 2805 fps | 96.8% |
| ReloadSwiss RS 60 | 53 gr | 80% | 32,634 psi | 51% | 2657 fps | 97.8% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 39,987 psi | 63% | 2812 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,352 psi | 68% | 2890 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 45,426 psi | 71% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,537 psi | 62% | 2677 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,953 psi | 52% | 2579 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 53,084 psi | 83% | 2943 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,177 psi | 66% | 2749 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,379 psi | 65% | 2756 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 37,768 psi | 59% | 2661 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 48,298 psi | 76% | 2887 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,881 psi | 83% | 2900 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,968 psi | 53% | 2628 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,649 psi | 83% | 2884 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,554 psi | 67% | 2756 fps | 96.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,988 psi | 64% | 2743 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,018 psi | 67% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,665 psi | 56% | 2549 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,659 psi | 75% | 2805 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 48,037 psi | 75% | 2871 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 42,743 psi | 67% | 2694 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,337 psi | 66% | 2759 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 34,026 psi | 53% | 2592 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 29,805 psi | 47% | 2569 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,646 psi | 76% | 2762 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,308 psi | 68% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,827 psi | 61% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,537 psi | 62% | 2674 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 32,227 psi | 51% | 2523 fps | 97% |
| Vihtavuori N160 | <<locked>> | 90% | 39,755 psi | 62% | 2743 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 44,527 psi | 70% | 2785 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 38,218 psi | 60% | 2661 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 38,986 psi | 61% | 2743 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 34,737 psi | 54% | 2713 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,750 psi | 51% | 2549 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 43,918 psi | 69% | 2828 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 49,516 psi | 78% | 2972 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,306 psi | 63% | 2743 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 115 powders for .300 RCM loaded with the .308 | 150gr | Alaska Bullet Works Kodiak SP SPBC. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,146 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, 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 3100, Accurate 4350, ADI AR 2209 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 .308 | 150gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.