Load Specifications
Load data in caliber .300 PRC with .308 | 178gr | Remington SP Extended-Range 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% | 56,260 psi | 87% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,566 psi | 89% | 2976 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,897 psi | 84% | 3031 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 58,059 psi | 89% | 2930 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,349 psi | 90% | 3035 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 56,231 psi | 87% | 3038 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,415 psi | 78% | 2933 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,092 psi | 69% | 2890 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,523 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,709 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,885 psi | 89% | 3022 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,304 psi | 87% | 3035 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,580 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,869 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,262 psi | 90% | 3097 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,798 psi | 89% | 2995 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 55,274 psi | 85% | 3015 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,910 psi | 81% | 3005 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 56,304 psi | 87% | 3035 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 56,101 psi | 86% | 2923 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 3025 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 55,477 psi | 85% | 2972 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 58,102 psi | 89% | 2989 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 56,043 psi | 86% | 2976 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,013 psi | 85% | 2959 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,769 psi | 90% | 2953 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,811 psi | 86% | 3140 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 56,014 psi | 86% | 3009 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 57% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,769 psi | 89% | 2959 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,551 psi | 89% | 2946 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,841 psi | 89% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,898 psi | 88% | 2956 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 57,899 psi | 89% | 3074 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 58,262 psi | 90% | 2943 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,405 psi | 87% | 2936 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,348 psi | 88% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,085 psi | 85% | 2959 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 40,669 psi | 63% | 2808 fps | 97.7% |
| Norma MRP | <<locked>> | 92% | 56,072 psi | 86% | 3054 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,883 psi | 86% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,839 psi | 84% | 3038 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 58,566 psi | 90% | 3018 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,232 psi | 88% | 3028 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 58% | 1909 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,667 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,941 psi | 86% | 3025 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,623 psi | 87% | 3136 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,488 psi | 79% | 3012 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 57,566 psi | 89% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,883 psi | 86% | 2946 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 57,305 psi | 88% | 3012 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 56,101 psi | 86% | 2923 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,262 psi | 90% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,405 psi | 87% | 2936 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,058 psi | 88% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,479 psi | 88% | 2897 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,869 psi | 87% | 3005 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 57,087 psi | 88% | 2913 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,392 psi | 88% | 2936 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 56,492 psi | 87% | 2963 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,972 psi | 89% | 2982 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 58,247 psi | 90% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,595 psi | 89% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,421 psi | 88% | 2963 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,855 psi | 87% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,130 psi | 86% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,854 psi | 86% | 3048 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 55,898 psi | 86% | 3028 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,518 psi | 81% | 3018 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,145 psi | 88% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,680 psi | 86% | 2976 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,492 psi | 85% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 58,059 psi | 89% | 2982 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% | 35,128 psi | 54% | 2543 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 46,978 psi | 72% | 2805 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 47,659 psi | 73% | 2897 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 54,665 psi | 84% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,088 psi | 60% | 2671 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 42,830 psi | 66% | 2782 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 41,147 psi | 63% | 2740 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 34,679 psi | 53% | 2635 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,831 psi | 69% | 2808 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,054 psi | 80% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,146 psi | 60% | 2664 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,521 psi | 58% | 2664 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,765 psi | 52% | 2572 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,312 psi | 45% | 2467 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,956 psi | 57% | 2707 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,302 psi | 84% | 2936 fps | 95.5% |
| Bofors RP15 | <<locked>> | 86% | 39,842 psi | 61% | 2720 fps | 95.9% |
| Bofors RP30 | <<locked>> | 92% | 40,248 psi | 62% | 2756 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 37,521 psi | 58% | 2664 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 49,487 psi | 76% | 2808 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 39,494 psi | 61% | 2703 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 48,646 psi | 75% | 2854 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,053 psi | 79% | 2871 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,788 psi | 70% | 2792 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,904 psi | 69% | 2772 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,438 psi | 65% | 2694 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,217 psi | 57% | 2740 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 48,211 psi | 74% | 2877 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 43% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,860 psi | 69% | 2736 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,865 psi | 78% | 2835 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,570 psi | 69% | 2746 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,367 psi | 68% | 2730 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 86% | 41,191 psi | 63% | 2759 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,472 psi | 75% | 2785 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,673 psi | 72% | 2769 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 30,240 psi | 47% | 2415 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 44,933 psi | 69% | 2776 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 35,520 psi | 55% | 2680 fps | 95.7% |
| Norma MRP | 74.2 gr | 80% | 36,651 psi | 56% | 2671 fps | 96.4% |
| Norma URP | <<locked>> | 80% | 45,948 psi | 71% | 2789 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 40,959 psi | 63% | 2766 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 44,802 psi | 69% | 2782 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 36,608 psi | 56% | 2641 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 44% | 1709 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,920 psi | 72% | 2825 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,034 psi | 69% | 2841 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,026 psi | 52% | 2644 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,761 psi | 73% | 2946 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,911 psi | 83% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,076 psi | 66% | 2710 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 38,566 psi | 59% | 2654 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,487 psi | 76% | 2808 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,472 psi | 75% | 2785 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,673 psi | 72% | 2769 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,635 psi | 83% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,398 psi | 73% | 2730 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,232 psi | 59% | 2648 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 53,722 psi | 83% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,947 psi | 68% | 2697 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 43,047 psi | 66% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,117 psi | 60% | 2635 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,314 psi | 79% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,384 psi | 73% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,230 psi | 56% | 2562 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 46,688 psi | 72% | 2785 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,826 psi | 58% | 2648 fps | 99.4% |
| Vihtavuori N560 | 79.8 gr | 86% | 45,469 psi | 70% | 2854 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 42,583 psi | 66% | 2779 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 49,008 psi | 75% | 2953 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,499 psi | 72% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,646 psi | 75% | 2854 fps | 99.3% |
| Winchester StaBALL HD | 73.4 gr | 80% | 29,965 psi | 46% | 2582 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,174 psi | 59% | 2615 fps | 95.4% |
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 | 178gr | Remington SP Extended-Range. Hodgdon Retumbo delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,140 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 178.0 gr projectile in 0.308" calls for a 1:6.0 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .300 PRC with the .308 | 178gr | Remington SP Extended-Range 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.