Load Specifications
Load data in caliber .300 PRC with .308 | 185gr | Berger Juggernaut Target bullet and 75 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% | 55,854 psi | 86% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,072 psi | 88% | 2913 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 58,378 psi | 90% | 3038 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 82% | 57,711 psi | 89% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,001 psi | 89% | 2972 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 55,695 psi | 86% | 2976 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,893 psi | 77% | 2871 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,556 psi | 69% | 2831 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,015 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,448 psi | 85% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,392 psi | 88% | 2959 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,724 psi | 86% | 2972 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,855 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,289 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,551 psi | 89% | 3035 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,319 psi | 88% | 2933 fps | 96.4% |
| Bofors RP15 | <<locked>> | 98% | 58,334 psi | 90% | 3012 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,112 psi | 80% | 2940 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 55,724 psi | 86% | 2972 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 55,738 psi | 86% | 2861 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,100 psi | 85% | 2963 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 55,056 psi | 85% | 2913 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,653 psi | 89% | 2923 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 55,622 psi | 86% | 2913 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 58,276 psi | 90% | 2956 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,334 psi | 90% | 2890 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,100 psi | 85% | 3074 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,521 psi | 85% | 2946 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,159 psi | 57% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,246 psi | 88% | 2897 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,203 psi | 88% | 2884 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,508 psi | 88% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,637 psi | 87% | 2900 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 57,392 psi | 88% | 3015 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 57,754 psi | 89% | 2881 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,941 psi | 86% | 2877 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,942 psi | 88% | 2897 fps | 100% |
| Norma 204 | <<locked>> | 88% | 58,494 psi | 90% | 2956 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 40,118 psi | 62% | 2753 fps | 97.8% |
| Norma MRP | <<locked>> | 92% | 55,506 psi | 85% | 2992 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,390 psi | 85% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 58,291 psi | 90% | 3038 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 57,986 psi | 89% | 2956 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,594 psi | 87% | 2969 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 59% | 1864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,246 psi | 88% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,564 psi | 85% | 2966 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,014 psi | 86% | 3074 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,734 psi | 78% | 2953 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 82% | 57,087 psi | 88% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,434 psi | 85% | 2884 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 56,942 psi | 88% | 2949 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 55,738 psi | 86% | 2861 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,754 psi | 89% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,941 psi | 86% | 2877 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 58,668 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,811 psi | 87% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,087 psi | 88% | 2835 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,492 psi | 87% | 2943 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,768 psi | 87% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,927 psi | 88% | 2877 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 55,883 psi | 86% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,305 psi | 88% | 2920 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,870 psi | 89% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,174 psi | 88% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,913 psi | 88% | 2900 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,318 psi | 87% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,463 psi | 85% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,332 psi | 85% | 2986 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 55,187 psi | 85% | 2966 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,866 psi | 80% | 2956 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,869 psi | 87% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,274 psi | 85% | 2917 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 54,752 psi | 84% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,290 psi | 88% | 2917 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% | 34,867 psi | 54% | 2490 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 46,644 psi | 72% | 2746 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 47,210 psi | 73% | 2841 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 54,418 psi | 84% | 2818 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,812 psi | 60% | 2615 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 86% | 42,351 psi | 65% | 2723 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 94% | 40,814 psi | 63% | 2684 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 32,227 psi | 50% | 2523 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,614 psi | 69% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,677 psi | 80% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,870 psi | 60% | 2612 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,188 psi | 57% | 2612 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,431 psi | 51% | 2516 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,095 psi | 45% | 2421 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,550 psi | 56% | 2654 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,896 psi | 83% | 2877 fps | 95.6% |
| Bofors RP15 | <<locked>> | 84% | 36,869 psi | 57% | 2602 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 39,769 psi | 61% | 2700 fps | 95.5% |
| Bofors RP5 | <<locked>> | 82% | 37,188 psi | 57% | 2612 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 49,139 psi | 76% | 2749 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,044 psi | 60% | 2648 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 48,240 psi | 74% | 2795 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 50,633 psi | 78% | 2808 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 45,281 psi | 70% | 2730 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,425 psi | 68% | 2713 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,177 psi | 65% | 2638 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,999 psi | 57% | 2687 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,935 psi | 74% | 2822 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 43% | 1624 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,556 psi | 69% | 2680 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,517 psi | 78% | 2772 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,251 psi | 68% | 2690 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,947 psi | 68% | 2671 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 40,872 psi | 63% | 2703 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 48,095 psi | 74% | 2723 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,514 psi | 72% | 2717 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 30,081 psi | 46% | 2369 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 44,628 psi | 69% | 2717 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 35,201 psi | 54% | 2631 fps | 96% |
| Norma MRP | 71.6 gr | 80% | 36,332 psi | 56% | 2618 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 45,759 psi | 70% | 2733 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 40,553 psi | 62% | 2710 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 44,425 psi | 68% | 2726 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 36,172 psi | 56% | 2585 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,586 psi | 72% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,759 psi | 69% | 2785 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,808 psi | 52% | 2598 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 43,642 psi | 67% | 2815 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 53,693 psi | 83% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,161 psi | 62% | 2598 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 38,247 psi | 59% | 2598 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 49,139 psi | 76% | 2749 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,095 psi | 74% | 2723 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,514 psi | 72% | 2717 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,911 psi | 84% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,490 psi | 82% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,992 psi | 72% | 2671 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,913 psi | 58% | 2592 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 53,287 psi | 82% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,700 psi | 67% | 2644 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 42,685 psi | 66% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,725 psi | 60% | 2582 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 51,140 psi | 79% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,079 psi | 72% | 2730 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,911 psi | 55% | 2510 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 46,485 psi | 72% | 2730 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,594 psi | 58% | 2595 fps | 99.5% |
| Vihtavuori N560 | 75.2 gr | 84% | 42,032 psi | 65% | 2733 fps | 95% |
| Vihtavuori N565 | <<locked>> | 90% | 42,134 psi | 65% | 2723 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 98% | 48,254 psi | 74% | 2894 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,122 psi | 71% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,414 psi | 74% | 2799 fps | 99.4% |
| Winchester StaBALL HD | 70.8 gr | 80% | 29,675 psi | 46% | 2533 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,927 psi | 58% | 2566 fps | 95.6% |
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 80 powders for .300 PRC loaded with the .308 | 185gr | Berger Juggernaut Target. Hodgdon Retumbo delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,074 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 185.0 gr projectile in 0.308" calls for a 1:12.0 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 | 185gr | Berger Juggernaut Target 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.