Load Specifications
Load data in caliber .300 RCM with .308 | 145gr | Prvi Partizan FMJ BT bullet and 100 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 ReloadSwiss RS 52.
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% | 56,550 psi | 89% | 2959 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,143 psi | 86% | 2986 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,462 psi | 85% | 2976 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,927 psi | 89% | 3048 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,244 psi | 85% | 3015 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 3018 fps | 98% |
| Accurate LT-30 | <<locked>> | 82% | 55,753 psi | 87% | 2904 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,159 psi | 88% | 2930 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,637 psi | 87% | 3051 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 56,652 psi | 89% | 3048 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 56,840 psi | 89% | 3028 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,882 psi | 86% | 3005 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 54,984 psi | 86% | 2989 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,463 psi | 88% | 3120 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,317 psi | 87% | 3169 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,304 psi | 88% | 3071 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,376 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,029 psi | 89% | 3094 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,023 psi | 77% | 3025 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3192 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,955 psi | 86% | 2894 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,666 psi | 87% | 3068 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 56,942 psi | 89% | 3087 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3045 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,681 psi | 89% | 2992 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 57,537 psi | 90% | 3091 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,637 psi | 87% | 3133 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 84% | 55,347 psi | 87% | 3009 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,797 psi | 89% | 3038 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,665 psi | 86% | 3041 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,417 psi | 84% | 3074 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 56,130 psi | 88% | 3064 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2900 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,245 psi | 87% | 3094 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 55% | 1854 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,696 psi | 90% | 3071 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 55,550 psi | 87% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,130 psi | 88% | 3031 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,623 psi | 89% | 3005 fps | 96.4% |
| IMR 4198 | <<locked>> | 84% | 56,275 psi | 88% | 2923 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,738 psi | 87% | 3022 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,587 psi | 75% | 2959 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 54,679 psi | 86% | 3068 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 54,882 psi | 86% | 3005 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,085 psi | 86% | 2992 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,042 psi | 86% | 3028 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,608 psi | 87% | 2979 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 55,622 psi | 87% | 3028 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3015 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 2986 fps | 95.8% |
| Norma 201 | <<locked>> | 90% | 54,375 psi | 85% | 2999 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,766 psi | 86% | 3002 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,173 psi | 88% | 3081 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 49,501 psi | 78% | 3012 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 94% | 56,840 psi | 89% | 3107 fps | 99.6% |
| Ramshot TAC | <<locked>> | 88% | 55,288 psi | 87% | 3015 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,607 psi | 86% | 3038 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,999 psi | 88% | 3009 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,346 psi | 55% | 1900 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,360 psi | 85% | 2989 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,998 psi | 86% | 3015 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,261 psi | 90% | 3163 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 56,811 psi | 89% | 3196 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,792 psi | 78% | 3041 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 3061 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,259 psi | 87% | 2982 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,766 psi | 86% | 2992 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 56,449 psi | 88% | 3071 fps | 99.8% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3045 fps | 96% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3015 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,042 psi | 86% | 3028 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,622 psi | 87% | 3028 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 2986 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,215 psi | 85% | 2959 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,101 psi | 89% | 3035 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,868 psi | 86% | 3084 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,305 psi | 90% | 2992 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,392 psi | 90% | 3051 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 57,638 psi | 90% | 3074 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,347 psi | 88% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,173 psi | 88% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2963 fps | 96.2% |
| Somchem S321 | <<locked>> | 86% | 56,246 psi | 88% | 3045 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,405 psi | 87% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,884 psi | 89% | 3045 fps | 99.6% |
| Somchem S355 | <<locked>> | 98% | 56,782 psi | 89% | 3071 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,324 psi | 69% | 2959 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 86% | 55,927 psi | 88% | 2910 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,347 psi | 88% | 2930 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 57,450 psi | 90% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,230 psi | 87% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,013 psi | 86% | 3002 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,243 psi | 82% | 3015 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 88% | 55,506 psi | 87% | 3009 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 57,246 psi | 90% | 3028 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 3015 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2999 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 54,839 psi | 86% | 3054 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,708 psi | 84% | 3077 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 92% | 57,435 psi | 90% | 3084 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% | 44,208 psi | 69% | 2766 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,211 psi | 76% | 2874 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,622 psi | 57% | 2667 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,250 psi | 68% | 2822 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 34,635 psi | 54% | 2648 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 40,553 psi | 64% | 2838 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 52,402 psi | 82% | 2854 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,794 psi | 83% | 2877 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,524 psi | 64% | 2769 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 36,854 psi | 58% | 2664 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 53,069 psi | 83% | 2972 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,540 psi | 67% | 2785 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 42,003 psi | 66% | 2789 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,400 psi | 77% | 2999 fps | 99.2% |
| Alliant Power Pro 2000-MR | 54.1 gr | 82% | 39,291 psi | 62% | 2838 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,794 psi | 53% | 2628 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,705 psi | 78% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,390 psi | 57% | 2690 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,814 psi | 64% | 2851 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,563 psi | 56% | 2753 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,648 psi | 81% | 2844 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,581 psi | 62% | 2762 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 33,286 psi | 52% | 2628 fps | 95.9% |
| Bofors RP7 | <<locked>> | 98% | 53,737 psi | 84% | 2986 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,628 psi | 70% | 2785 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,147 psi | 64% | 2802 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,034 psi | 71% | 2943 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,733 psi | 76% | 2904 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,501 psi | 78% | 2923 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 41,843 psi | 66% | 2805 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 98% | 49,893 psi | 78% | 3012 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,872 psi | 64% | 2782 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,012 psi | 55% | 2677 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,738 psi | 58% | 2740 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,962 psi | 41% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,407 psi | 62% | 2736 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 40,132 psi | 63% | 2792 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,274 psi | 57% | 2648 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,980 psi | 78% | 2894 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 50,096 psi | 79% | 2835 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,489 psi | 82% | 2966 fps | 95.5% |
| IMR 4831 | <<locked>> | 94% | 39,059 psi | 61% | 2785 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 37,246 psi | 58% | 2726 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 42,540 psi | 67% | 2785 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 47,935 psi | 75% | 2877 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,175 psi | 61% | 2749 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 41,118 psi | 64% | 2717 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 36,042 psi | 56% | 2654 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 45,513 psi | 71% | 2848 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 48,950 psi | 77% | 2933 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,697 psi | 62% | 2723 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 39,871 psi | 62% | 2743 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 35,781 psi | 56% | 2680 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 40,915 psi | 64% | 2841 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 35,331 psi | 55% | 2687 fps | 95.1% |
| Ramshot TAC | <<locked>> | 82% | 45,382 psi | 71% | 2838 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,771 psi | 65% | 2802 fps | 97.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,224 psi | 72% | 2838 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,165 psi | 41% | 1696 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,819 psi | 75% | 2884 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,472 psi | 76% | 2904 fps | 95.4% |
| ReloadSwiss RS 52 | 51.1 gr | 80% | 37,594 psi | 59% | 2789 fps | 95.5% |
| ReloadSwiss RS 60 | 51.9 gr | 80% | 31,038 psi | 49% | 2635 fps | 96.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,495 psi | 63% | 2858 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,048 psi | 69% | 2930 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,526 psi | 68% | 2782 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,768 psi | 59% | 2671 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 33,359 psi | 52% | 2621 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 98% | 53,737 psi | 84% | 2986 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 45,513 psi | 71% | 2848 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,175 psi | 61% | 2749 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 36,042 psi | 56% | 2654 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 48,950 psi | 77% | 2933 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,691 psi | 79% | 2900 fps | 99.5% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,534 psi | 84% | 2982 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,869 psi | 58% | 2733 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,415 psi | 79% | 2890 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,627 psi | 68% | 2808 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,059 psi | 61% | 2733 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,234 psi | 65% | 2694 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,026 psi | 53% | 2546 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,938 psi | 81% | 2907 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 45,934 psi | 72% | 2871 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 40,756 psi | 64% | 2694 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 40,335 psi | 63% | 2749 fps | 96.9% |
| Somchem S355 | <<locked>> | 82% | 34,476 psi | 54% | 2635 fps | 95.7% |
| Somchem S365 | <<locked>> | 88% | 30,066 psi | 47% | 2602 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 46,673 psi | 73% | 2769 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,423 psi | 65% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,869 psi | 58% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,782 psi | 59% | 2674 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 30,632 psi | 48% | 2516 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 92% | 40,074 psi | 63% | 2782 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 42,670 psi | 67% | 2785 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,361 psi | 57% | 2657 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 42,221 psi | 66% | 2844 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,446 psi | 52% | 2592 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 41,698 psi | 65% | 2822 fps | 99.1% |
| Winchester 760 | <<locked>> | 98% | 50,169 psi | 79% | 3018 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,377 psi | 60% | 2736 fps | 97.1% |
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 112 powders for .300 RCM loaded with the .308 | 145gr | Prvi Partizan FMJ BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,196 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, ReloadSwiss RS 52 rank at the top here: for .300 RCM with the .308 | 145gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 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.