Load Specifications
Load data in caliber .300 PRC with .308 | 181gr | RWS H-Mantel bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Ramshot Grand.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 57,029 psi | 88% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,233 psi | 90% | 2963 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,477 psi | 85% | 3022 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 58,581 psi | 90% | 2913 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 55,172 psi | 85% | 2963 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 56,753 psi | 87% | 3028 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,879 psi | 78% | 2920 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,600 psi | 70% | 2881 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,332 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,420 psi | 87% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,378 psi | 90% | 3009 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,884 psi | 88% | 3022 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,131 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,522 psi | 88% | 3051 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,737 psi | 84% | 3022 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,088 psi | 89% | 2979 fps | 96.6% |
| Bofors RP15 | <<locked>> | 96% | 55,825 psi | 86% | 3005 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,534 psi | 82% | 2992 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 56,884 psi | 88% | 3022 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 56,463 psi | 87% | 2904 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,115 psi | 86% | 3012 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,898 psi | 86% | 2956 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 58,508 psi | 90% | 2972 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 56,521 psi | 87% | 2963 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,477 psi | 85% | 2943 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,593 psi | 86% | 2884 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,463 psi | 87% | 3127 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,521 psi | 87% | 2995 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 57% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,204 psi | 90% | 2946 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,885 psi | 89% | 2927 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 58,291 psi | 90% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,319 psi | 88% | 2943 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 58,494 psi | 90% | 3064 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 58,595 psi | 90% | 2927 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,768 psi | 87% | 2923 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,131 psi | 89% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,767 psi | 86% | 2949 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 41,191 psi | 63% | 2802 fps | 98% |
| Norma MRP | <<locked>> | 92% | 56,695 psi | 87% | 3041 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,289 psi | 87% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,448 psi | 85% | 3025 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 55,347 psi | 85% | 2949 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,899 psi | 89% | 3018 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 58% | 1893 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,204 psi | 90% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,492 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,348 psi | 88% | 3127 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,214 psi | 80% | 3005 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 57,914 psi | 89% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,304 psi | 87% | 2933 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 92% | 58,001 psi | 89% | 2999 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 56,463 psi | 87% | 2904 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,595 psi | 90% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,768 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,551 psi | 89% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,856 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,566 psi | 89% | 2995 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 57,406 psi | 88% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,856 psi | 89% | 2923 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 57,029 psi | 88% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,494 psi | 90% | 2969 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,143 psi | 85% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,218 psi | 90% | 2933 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,943 psi | 89% | 2949 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 57,290 psi | 88% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,681 psi | 87% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,420 psi | 87% | 3035 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 98% | 56,521 psi | 87% | 3018 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,214 psi | 82% | 3009 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,812 psi | 89% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,072 psi | 86% | 2959 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,333 psi | 87% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 58,581 psi | 90% | 2969 fps | 99.6% |
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 3100 | <<locked>> | 80% | 35,578 psi | 55% | 2533 fps | 97.4% |
| Accurate 4350 | <<locked>> | 80% | 47,558 psi | 73% | 2792 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 44,976 psi | 69% | 2825 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 55,114 psi | 85% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,523 psi | 61% | 2661 fps | 96% |
| ADI AR 2213 | <<locked>> | 86% | 43,178 psi | 66% | 2772 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 94% | 41,698 psi | 64% | 2733 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 32,808 psi | 50% | 2562 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,368 psi | 70% | 2795 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,475 psi | 81% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,595 psi | 61% | 2657 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,884 psi | 58% | 2654 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,069 psi | 52% | 2559 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,675 psi | 46% | 2464 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,507 psi | 58% | 2700 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,723 psi | 84% | 2923 fps | 95.8% |
| Bofors RP15 | <<locked>> | 84% | 37,695 psi | 58% | 2648 fps | 95.3% |
| Bofors RP30 | <<locked>> | 92% | 40,683 psi | 63% | 2746 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 37,884 psi | 58% | 2654 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 49,763 psi | 77% | 2792 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 39,842 psi | 61% | 2697 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 48,979 psi | 75% | 2841 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 51,416 psi | 79% | 2854 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 43,120 psi | 66% | 2717 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,295 psi | 70% | 2762 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,757 psi | 66% | 2677 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,739 psi | 58% | 2733 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 48,820 psi | 75% | 2867 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 43% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,324 psi | 70% | 2723 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,155 psi | 79% | 2818 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 45,063 psi | 69% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,686 psi | 69% | 2717 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 86% | 41,582 psi | 64% | 2746 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 48,747 psi | 75% | 2769 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 47,152 psi | 73% | 2759 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 30,589 psi | 47% | 2405 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 45,455 psi | 70% | 2762 fps | 97.5% |
| Norma 217 | <<locked>> | 94% | 33,692 psi | 52% | 2615 fps | 95% |
| Norma MRP | 73.9 gr | 80% | 37,014 psi | 57% | 2661 fps | 96.7% |
| Norma URP | <<locked>> | 80% | 46,456 psi | 71% | 2779 fps | 100% |
| Ramshot Grand | 78.8 gr | 86% | 41,350 psi | 64% | 2756 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,339 psi | 70% | 2776 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 34,345 psi | 53% | 2566 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,456 psi | 44% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,326 psi | 73% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,585 psi | 70% | 2828 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,505 psi | 53% | 2641 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,715 psi | 69% | 2864 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 54,418 psi | 84% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,886 psi | 63% | 2641 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 38,885 psi | 60% | 2641 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 49,763 psi | 77% | 2792 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,747 psi | 75% | 2769 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 47,152 psi | 73% | 2759 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,056 psi | 83% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,703 psi | 73% | 2717 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,551 psi | 59% | 2635 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 54,012 psi | 83% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,469 psi | 68% | 2690 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 43,598 psi | 67% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,436 psi | 61% | 2625 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 51,793 psi | 80% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,921 psi | 74% | 2772 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,535 psi | 56% | 2552 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 47,210 psi | 73% | 2772 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,319 psi | 59% | 2641 fps | 99.6% |
| Vihtavuori N560 | 77.6 gr | 84% | 42,757 psi | 66% | 2779 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 43,062 psi | 66% | 2769 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 46,137 psi | 71% | 2877 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,891 psi | 72% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,168 psi | 76% | 2844 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,371 psi | 47% | 2575 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,682 psi | 60% | 2608 fps | 95.8% |
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 79 powders for .300 PRC loaded with the .308 | 181gr | RWS H-Mantel. Hodgdon Retumbo delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,127 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 181.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Vihtavuori N560, Norma MRP, Ramshot Grand rank at the top here: for .300 PRC with the .308 | 181gr | RWS H-Mantel they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.