Load Specifications
Load data in caliber .300 PRC with .308 | 180gr | MAKER Expanding Subsonic bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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% | 56,347 psi | 87% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,522 psi | 88% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,824 psi | 84% | 3015 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 58,146 psi | 89% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,378 psi | 90% | 3018 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 56,101 psi | 86% | 3022 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,314 psi | 77% | 2917 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,918 psi | 69% | 2874 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,479 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,666 psi | 86% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,725 psi | 89% | 3005 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,202 psi | 86% | 3015 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,406 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,826 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,160 psi | 89% | 3081 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,609 psi | 89% | 2979 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 55,172 psi | 85% | 2999 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,823 psi | 81% | 2989 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 56,202 psi | 86% | 3015 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 55,999 psi | 86% | 2904 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,535 psi | 85% | 3009 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 55,448 psi | 85% | 2956 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 58,044 psi | 89% | 2969 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 55,883 psi | 86% | 2956 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 58,726 psi | 90% | 3002 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,697 psi | 90% | 2936 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,579 psi | 86% | 3120 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,840 psi | 86% | 2992 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 57% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,769 psi | 89% | 2946 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,479 psi | 88% | 2927 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,841 psi | 89% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,971 psi | 88% | 2940 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 57,798 psi | 89% | 3061 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 58,189 psi | 90% | 2927 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,347 psi | 87% | 2923 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,435 psi | 88% | 2943 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,100 psi | 85% | 2943 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 40,567 psi | 62% | 2795 fps | 97.7% |
| Norma MRP | <<locked>> | 92% | 55,985 psi | 86% | 3035 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,825 psi | 86% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,520 psi | 84% | 3015 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 58,407 psi | 90% | 3002 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,203 psi | 88% | 3012 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,913 psi | 58% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,508 psi | 88% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,970 psi | 86% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,449 psi | 87% | 3120 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,343 psi | 79% | 2995 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 57,450 psi | 88% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,651 psi | 86% | 2927 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 57,334 psi | 88% | 2995 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 55,999 psi | 86% | 2904 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,189 psi | 90% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,347 psi | 87% | 2923 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,116 psi | 88% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,464 psi | 88% | 2881 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,898 psi | 88% | 2989 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,956 psi | 88% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,290 psi | 88% | 2920 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 56,463 psi | 87% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,827 psi | 89% | 2966 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 58,378 psi | 90% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,551 psi | 89% | 2933 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,305 psi | 88% | 2946 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,811 psi | 87% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,956 psi | 86% | 2963 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,753 psi | 86% | 3028 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 55,666 psi | 86% | 3009 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,576 psi | 81% | 3005 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,174 psi | 88% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,593 psi | 86% | 2959 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,477 psi | 85% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,943 psi | 89% | 2966 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 3100 | <<locked>> | 80% | 35,056 psi | 54% | 2526 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 46,862 psi | 72% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 47,688 psi | 73% | 2884 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 54,679 psi | 84% | 2861 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,131 psi | 60% | 2657 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 42,641 psi | 66% | 2766 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 41,191 psi | 63% | 2726 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 34,577 psi | 53% | 2618 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,875 psi | 69% | 2795 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,996 psi | 80% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,059 psi | 60% | 2651 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,478 psi | 58% | 2648 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,649 psi | 52% | 2556 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,356 psi | 45% | 2457 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,912 psi | 57% | 2694 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,273 psi | 83% | 2920 fps | 95.6% |
| Bofors RP15 | <<locked>> | 84% | 37,275 psi | 57% | 2641 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 40,103 psi | 62% | 2740 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 37,478 psi | 58% | 2648 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 49,356 psi | 76% | 2792 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,349 psi | 61% | 2690 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 48,559 psi | 75% | 2838 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 50,981 psi | 78% | 2854 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 45,600 psi | 70% | 2772 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,715 psi | 69% | 2756 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,308 psi | 65% | 2677 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,246 psi | 57% | 2726 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 48,211 psi | 74% | 2864 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 43% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,904 psi | 69% | 2723 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,749 psi | 78% | 2818 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,628 psi | 69% | 2733 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,309 psi | 68% | 2713 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 41,176 psi | 63% | 2743 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 48,341 psi | 74% | 2766 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,746 psi | 72% | 2759 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 30,226 psi | 47% | 2402 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 44,889 psi | 69% | 2756 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 35,433 psi | 55% | 2667 fps | 95.8% |
| Norma MRP | 73.5 gr | 80% | 36,579 psi | 56% | 2657 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 45,963 psi | 71% | 2776 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 40,944 psi | 63% | 2753 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,701 psi | 69% | 2769 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 36,492 psi | 56% | 2625 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,471 psi | 44% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,847 psi | 72% | 2808 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,976 psi | 69% | 2825 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,055 psi | 52% | 2635 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,587 psi | 73% | 2927 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,940 psi | 83% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,178 psi | 66% | 2697 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 38,435 psi | 59% | 2635 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,356 psi | 76% | 2792 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,341 psi | 74% | 2766 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,746 psi | 72% | 2759 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,664 psi | 83% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,326 psi | 73% | 2713 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,116 psi | 59% | 2631 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 53,548 psi | 82% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,947 psi | 68% | 2684 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 43,076 psi | 66% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,015 psi | 60% | 2621 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,372 psi | 79% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,297 psi | 73% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,187 psi | 56% | 2549 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 46,760 psi | 72% | 2772 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,840 psi | 58% | 2635 fps | 99.5% |
| Vihtavuori N560 | 79 gr | 86% | 45,339 psi | 70% | 2838 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 42,467 psi | 65% | 2762 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 48,820 psi | 75% | 2936 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,470 psi | 71% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,718 psi | 75% | 2841 fps | 99.3% |
| Winchester StaBALL HD | 72.7 gr | 80% | 29,892 psi | 46% | 2566 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,116 psi | 59% | 2602 fps | 95.5% |
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 | 180gr | MAKER Expanding Subsonic. Hodgdon Retumbo delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,120 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 180.0 gr projectile in 0.308" calls for a 1:13.5 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .300 PRC with the .308 | 180gr | MAKER Expanding Subsonic 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.