Load Specifications
Load data in caliber .300 RCM with .308 | 142gr | IBEX TRD bullet and 92 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>> | 86% | 54,969 psi | 86% | 2936 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,014 psi | 89% | 3012 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,348 psi | 90% | 3015 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,911 psi | 86% | 3018 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 56,884 psi | 89% | 3054 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 3048 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 82% | 56,405 psi | 88% | 2917 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,811 psi | 89% | 2940 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,884 psi | 89% | 3074 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 96% | 57,435 psi | 90% | 3061 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,927 psi | 88% | 3025 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 88% | 55,970 psi | 88% | 3009 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,360 psi | 85% | 3087 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,927 psi | 88% | 3179 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 57,421 psi | 90% | 3091 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,592 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,781 psi | 86% | 3058 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 3045 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,186 psi | 85% | 3146 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,767 psi | 87% | 2910 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,304 psi | 88% | 3077 fps | 98.7% |
| Bofors RP3 | <<locked>> | 94% | 54,781 psi | 86% | 3058 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,636 psi | 86% | 2963 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,376 psi | 87% | 3058 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,695 psi | 89% | 3153 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 84% | 56,434 psi | 88% | 3028 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 57,595 psi | 90% | 3054 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,738 psi | 87% | 3058 fps | 98% |
| Hodgdon H4895 | <<locked>> | 90% | 57,363 psi | 90% | 3084 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,456 psi | 73% | 2923 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,173 psi | 88% | 3114 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 56% | 1864 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,984 psi | 86% | 3031 fps | 99.5% |
| IMR 3031 | <<locked>> | 90% | 56,942 psi | 89% | 3077 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 57,014 psi | 89% | 3045 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,464 psi | 90% | 3018 fps | 96.1% |
| IMR 4198 | <<locked>> | 84% | 57,058 psi | 89% | 2940 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,623 psi | 89% | 3035 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,863 psi | 77% | 2979 fps | 97.4% |
| IMR 4895 | <<locked>> | 92% | 56,115 psi | 88% | 3094 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 55,927 psi | 88% | 3025 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 57,014 psi | 89% | 3022 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,550 psi | 89% | 3054 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,536 psi | 89% | 2995 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 57,174 psi | 90% | 3054 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3031 fps | 97.3% |
| Norma 201 | <<locked>> | 90% | 56,101 psi | 88% | 3025 fps | 99.8% |
| Norma 202 | <<locked>> | 90% | 56,130 psi | 88% | 3028 fps | 100% |
| Norma 203B | <<locked>> | 94% | 57,305 psi | 90% | 3097 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 50,778 psi | 80% | 3031 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 94% | 57,537 psi | 90% | 3120 fps | 99.4% |
| Ramshot TAC | <<locked>> | 88% | 56,347 psi | 88% | 3031 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,622 psi | 87% | 3058 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 86% | 57,217 psi | 90% | 3025 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 56% | 1906 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,695 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,202 psi | 88% | 3035 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,563 psi | 86% | 3123 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,624 psi | 90% | 3215 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,850 psi | 80% | 3061 fps | 97.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 3077 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 88% | 57,580 psi | 90% | 3015 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,507 psi | 89% | 3018 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 54,636 psi | 86% | 3045 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3031 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,550 psi | 89% | 3054 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 57,174 psi | 90% | 3054 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,332 psi | 87% | 2976 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,695 psi | 87% | 3100 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,911 psi | 86% | 2963 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,071 psi | 86% | 3012 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,245 psi | 87% | 3038 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 57,392 psi | 90% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 57,232 psi | 90% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 56,956 psi | 89% | 2986 fps | 96% |
| Somchem S321 | <<locked>> | 86% | 57,392 psi | 90% | 3061 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 56,855 psi | 89% | 2963 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,638 psi | 90% | 3058 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 55,056 psi | 86% | 3045 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,600 psi | 71% | 2982 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 86% | 57,421 psi | 90% | 2933 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,232 psi | 90% | 2946 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,579 psi | 87% | 2989 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,492 psi | 89% | 3002 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,318 psi | 88% | 3022 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,127 psi | 83% | 3028 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 88% | 56,637 psi | 89% | 3028 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 54,781 psi | 86% | 2999 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,344 psi | 82% | 3035 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,099 psi | 85% | 3012 fps | 99.5% |
| Winchester 748 | <<locked>> | 88% | 55,985 psi | 88% | 3074 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,737 psi | 86% | 3045 fps | 99.5% |
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% | 46,021 psi | 72% | 2795 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,314 psi | 79% | 2907 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,885 psi | 63% | 2726 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,339 psi | 71% | 2858 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 37,565 psi | 59% | 2707 fps | 99.3% |
| Accurate 4350 | <<locked>> | 94% | 42,438 psi | 67% | 2877 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 53,403 psi | 84% | 2871 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,708 psi | 84% | 2894 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,076 psi | 66% | 2799 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 38,203 psi | 60% | 2690 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,932 psi | 69% | 2812 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,642 psi | 68% | 2822 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,749 psi | 80% | 3025 fps | 99.1% |
| Alliant Power Pro 2000-MR | 52.8 gr | 82% | 40,611 psi | 64% | 2864 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,665 psi | 56% | 2671 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,343 psi | 80% | 2897 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,116 psi | 60% | 2726 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,989 psi | 66% | 2874 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 86% | 37,173 psi | 58% | 2785 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,460 psi | 82% | 2861 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,857 psi | 64% | 2789 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 35,476 psi | 56% | 2674 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,905 psi | 72% | 2808 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,714 psi | 67% | 2835 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,209 psi | 72% | 2966 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 49,850 psi | 78% | 2927 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,865 psi | 80% | 2949 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 43,540 psi | 68% | 2835 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,453 psi | 67% | 2812 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 36,666 psi | 57% | 2710 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,305 psi | 60% | 2772 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 42% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,698 psi | 64% | 2759 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 41,640 psi | 65% | 2825 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,724 psi | 59% | 2674 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,186 psi | 85% | 2963 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,169 psi | 80% | 2854 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,476 psi | 84% | 2982 fps | 95.2% |
| IMR 4831 | <<locked>> | 94% | 40,625 psi | 64% | 2818 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 38,928 psi | 61% | 2759 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,932 psi | 69% | 2812 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 50,096 psi | 79% | 2910 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 41,234 psi | 65% | 2789 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 42,380 psi | 66% | 2736 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 37,898 psi | 59% | 2690 fps | 97.3% |
| Lovex S065 | <<locked>> | 94% | 47,297 psi | 74% | 2877 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,901 psi | 66% | 2762 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 41,727 psi | 65% | 2776 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 37,536 psi | 59% | 2717 fps | 95.7% |
| Norma URP | <<locked>> | 94% | 42,308 psi | 66% | 2867 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 36,811 psi | 58% | 2717 fps | 95.1% |
| Ramshot TAC | <<locked>> | 82% | 46,775 psi | 73% | 2861 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,265 psi | 68% | 2831 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,485 psi | 74% | 2858 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 42% | 1706 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,153 psi | 77% | 2907 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 49,734 psi | 78% | 2923 fps | 95.2% |
| ReloadSwiss RS 52 | 49.9 gr | 80% | 39,204 psi | 61% | 2822 fps | 95.5% |
| ReloadSwiss RS 60 | 50.7 gr | 80% | 32,779 psi | 51% | 2677 fps | 96.7% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,945 psi | 66% | 2884 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 45,266 psi | 71% | 2949 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 45,977 psi | 72% | 2822 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 39,987 psi | 63% | 2713 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,460 psi | 52% | 2615 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,297 psi | 74% | 2877 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,234 psi | 65% | 2789 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 37,898 psi | 59% | 2690 fps | 97.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,837 psi | 81% | 2920 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,187 psi | 57% | 2710 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,576 psi | 81% | 2910 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 45,324 psi | 71% | 2838 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,567 psi | 64% | 2762 fps | 96.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,859 psi | 67% | 2720 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,636 psi | 56% | 2579 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,359 psi | 84% | 2930 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 47,413 psi | 74% | 2894 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 42,714 psi | 67% | 2726 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 41,713 psi | 65% | 2776 fps | 96.8% |
| Somchem S355 | <<locked>> | 80% | 34,287 psi | 54% | 2621 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 31,923 psi | 50% | 2648 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 48,182 psi | 76% | 2795 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,830 psi | 67% | 2720 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,783 psi | 61% | 2707 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,334 psi | 62% | 2703 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 32,474 psi | 51% | 2556 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 41,568 psi | 65% | 2812 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,135 psi | 69% | 2812 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 38,043 psi | 60% | 2690 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 94% | 43,497 psi | 68% | 2871 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,940 psi | 55% | 2625 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 43,192 psi | 68% | 2851 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,943 psi | 63% | 2766 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 92 powders for .300 RCM loaded with the .308 | 142gr | IBEX TRD. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,215 fps. Accurate 4350 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 142.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 | 142gr | IBEX TRD 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.