Load Specifications
Load data in caliber .300 PRC with .308 | 190gr | Speer Impact bullet and 77 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% | 56,507 psi | 87% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,812 psi | 89% | 2884 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 58,131 psi | 89% | 3005 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 92% | 55,042 psi | 85% | 2946 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 58,465 psi | 90% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,581 psi | 90% | 2946 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 56,376 psi | 87% | 2953 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,546 psi | 78% | 2848 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,194 psi | 70% | 2812 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 58,697 psi | 90% | 2940 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 58,697 psi | 90% | 2940 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,813 psi | 90% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,014 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,957 psi | 89% | 2930 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,420 psi | 87% | 2946 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,566 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,159 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,465 psi | 90% | 3005 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,914 psi | 89% | 2910 fps | 96.8% |
| Bofors RP15 | <<locked>> | 96% | 55,376 psi | 85% | 2927 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,968 psi | 81% | 2920 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 56,420 psi | 87% | 2946 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 56,275 psi | 87% | 2831 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,651 psi | 86% | 2936 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 55,724 psi | 86% | 2884 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 58,262 psi | 90% | 2897 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 56,231 psi | 87% | 2887 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,172 psi | 85% | 2871 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,361 psi | 85% | 2812 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,985 psi | 86% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,188 psi | 86% | 2923 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 57% | 1791 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,957 psi | 89% | 2871 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,754 psi | 89% | 2854 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 58,001 psi | 89% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,130 psi | 88% | 2871 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 58,160 psi | 89% | 2989 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 58,378 psi | 90% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,594 psi | 87% | 2848 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,638 psi | 89% | 2871 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,376 psi | 85% | 2871 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 40,814 psi | 63% | 2736 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 56,275 psi | 87% | 2966 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,086 psi | 86% | 2867 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,955 psi | 85% | 2949 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 58,769 psi | 90% | 2927 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,334 psi | 88% | 2940 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,043 psi | 59% | 1837 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,870 psi | 89% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,202 psi | 86% | 2936 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,855 psi | 87% | 3048 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,517 psi | 79% | 2930 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 57,870 psi | 89% | 2831 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,941 psi | 86% | 2858 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 57,580 psi | 89% | 2920 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 56,275 psi | 87% | 2831 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,378 psi | 90% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,594 psi | 87% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,261 psi | 88% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,682 psi | 89% | 2808 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,145 psi | 88% | 2917 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 57,319 psi | 88% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,537 psi | 89% | 2851 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 56,681 psi | 87% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,160 psi | 89% | 2894 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 58,494 psi | 90% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,870 psi | 89% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,609 psi | 89% | 2874 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 57,043 psi | 88% | 2864 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,347 psi | 87% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,057 psi | 86% | 2963 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 56,057 psi | 86% | 2943 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,765 psi | 81% | 2936 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,450 psi | 88% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,941 psi | 86% | 2887 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,811 psi | 86% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,986 psi | 89% | 2890 fps | 99.7% |
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% | 35,331 psi | 54% | 2470 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 47,210 psi | 73% | 2720 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 40,988 psi | 63% | 2690 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 86% | 44,585 psi | 69% | 2756 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 54,882 psi | 84% | 2789 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,247 psi | 60% | 2592 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 40,190 psi | 62% | 2641 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 41,278 psi | 64% | 2664 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 90% | 32,605 psi | 50% | 2503 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,726 psi | 61% | 2595 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,726 psi | 61% | 2595 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,092 psi | 69% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,170 psi | 80% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,363 psi | 61% | 2589 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,273 psi | 54% | 2533 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,866 psi | 52% | 2493 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,443 psi | 45% | 2402 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,188 psi | 57% | 2635 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,169 psi | 79% | 2795 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 37,405 psi | 58% | 2582 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 37,681 psi | 58% | 2618 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 35,273 psi | 54% | 2533 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 49,763 psi | 77% | 2723 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,639 psi | 61% | 2631 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 48,820 psi | 75% | 2769 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,343 psi | 79% | 2785 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 42,960 psi | 66% | 2651 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,105 psi | 65% | 2635 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,656 psi | 66% | 2612 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 35,056 psi | 54% | 2605 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 48,457 psi | 75% | 2795 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 43% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,005 psi | 69% | 2654 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,995 psi | 78% | 2746 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 44,918 psi | 69% | 2667 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,684 psi | 64% | 2592 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 41,292 psi | 64% | 2680 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 48,544 psi | 75% | 2697 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,007 psi | 72% | 2690 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,458 psi | 47% | 2349 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,136 psi | 69% | 2694 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 33,402 psi | 51% | 2552 fps | 95.4% |
| Norma MRP | 71 gr | 80% | 36,898 psi | 57% | 2598 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 46,253 psi | 71% | 2707 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 41,205 psi | 63% | 2690 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 44,976 psi | 69% | 2703 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,214 psi | 53% | 2507 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 44% | 1644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,224 psi | 73% | 2743 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,208 psi | 70% | 2756 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 31,865 psi | 49% | 2513 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,266 psi | 68% | 2795 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 54,244 psi | 83% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,741 psi | 63% | 2579 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 38,725 psi | 60% | 2575 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 49,763 psi | 77% | 2723 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,544 psi | 75% | 2697 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,007 psi | 72% | 2690 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,911 psi | 83% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,659 psi | 73% | 2648 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,392 psi | 59% | 2572 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 53,809 psi | 83% | 2769 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,266 psi | 68% | 2625 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 43,265 psi | 67% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,378 psi | 61% | 2562 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 51,648 psi | 79% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,645 psi | 73% | 2700 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,026 psi | 52% | 2434 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 47,021 psi | 72% | 2707 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,116 psi | 59% | 2572 fps | 99.7% |
| Vihtavuori N560 | 74.5 gr | 84% | 42,496 psi | 65% | 2710 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 42,728 psi | 66% | 2700 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 96% | 45,672 psi | 70% | 2808 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,746 psi | 72% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,994 psi | 75% | 2772 fps | 99.5% |
| Winchester StaBALL HD | 70.2 gr | 80% | 30,124 psi | 46% | 2513 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,911 psi | 55% | 2487 fps | 95.2% |
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 77 powders for .300 PRC loaded with the .308 | 190gr | Speer Impact. Hodgdon Retumbo delivers the highest muzzle velocity at 3,051 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,051 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 190.0 gr projectile in 0.308" calls for a 1:11.5 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 | 190gr | Speer Impact 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.