Load Specifications
Load data in caliber .300 PRC with .308 | 180gr | Speer TBBC 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% | 56,101 psi | 86% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,406 psi | 88% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 58,610 psi | 90% | 3077 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,841 psi | 89% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,131 psi | 89% | 3012 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 55,883 psi | 86% | 3018 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,096 psi | 77% | 2910 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,715 psi | 69% | 2867 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,160 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,593 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,493 psi | 88% | 2999 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,912 psi | 86% | 3012 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,130 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,565 psi | 87% | 3045 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,899 psi | 89% | 3077 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,435 psi | 88% | 2972 fps | 96.3% |
| Bofors RP15 | <<locked>> | 98% | 58,711 psi | 90% | 3054 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,562 psi | 81% | 2982 fps | 98.5% |
| Bofors RP5 | <<locked>> | 94% | 55,912 psi | 86% | 3012 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 55,970 psi | 86% | 2900 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,288 psi | 85% | 3002 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 55,129 psi | 85% | 2953 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,783 psi | 89% | 2966 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 55,666 psi | 86% | 2953 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 58,450 psi | 90% | 2995 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,421 psi | 90% | 2930 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,332 psi | 85% | 3117 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,593 psi | 86% | 2986 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 57% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,522 psi | 88% | 2940 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,203 psi | 88% | 2923 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,537 psi | 89% | 2946 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,695 psi | 87% | 2936 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 57,508 psi | 88% | 3054 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 57,928 psi | 89% | 2920 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,057 psi | 86% | 2917 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,174 psi | 88% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 88% | 58,653 psi | 90% | 2999 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 40,335 psi | 62% | 2789 fps | 97.6% |
| Norma MRP | <<locked>> | 92% | 55,695 psi | 86% | 3031 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,521 psi | 85% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 58,581 psi | 90% | 3081 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 58,102 psi | 89% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,942 psi | 88% | 3009 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 58% | 1893 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,406 psi | 88% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,709 psi | 86% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,231 psi | 87% | 3114 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,140 psi | 79% | 2992 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 57,363 psi | 88% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,622 psi | 86% | 2927 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 57,087 psi | 88% | 2989 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 55,970 psi | 86% | 2900 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,928 psi | 89% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,057 psi | 86% | 2917 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 58,813 psi | 90% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,768 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,203 psi | 88% | 2877 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,637 psi | 87% | 2986 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 56,869 psi | 87% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,087 psi | 88% | 2917 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 56,144 psi | 86% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,595 psi | 89% | 2963 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 58,088 psi | 89% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,464 psi | 88% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,072 psi | 88% | 2940 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,565 psi | 87% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,869 psi | 86% | 2963 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,506 psi | 85% | 3025 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 55,419 psi | 85% | 3005 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,141 psi | 80% | 2995 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,927 psi | 88% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,332 psi | 85% | 2956 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,100 psi | 85% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,682 psi | 89% | 2959 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% | 34,940 psi | 54% | 2523 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 46,746 psi | 72% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 47,456 psi | 73% | 2881 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 54,418 psi | 84% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,914 psi | 60% | 2651 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 42,583 psi | 66% | 2762 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 41,017 psi | 63% | 2723 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 34,519 psi | 53% | 2615 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,788 psi | 69% | 2792 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,677 psi | 80% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,957 psi | 60% | 2648 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,217 psi | 57% | 2644 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,576 psi | 52% | 2552 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,182 psi | 45% | 2451 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,811 psi | 57% | 2690 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,099 psi | 83% | 2917 fps | 95.5% |
| Bofors RP15 | <<locked>> | 86% | 39,537 psi | 61% | 2697 fps | 95.9% |
| Bofors RP30 | <<locked>> | 92% | 39,885 psi | 61% | 2733 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 37,217 psi | 57% | 2644 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 49,255 psi | 76% | 2789 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 39,291 psi | 60% | 2687 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 48,283 psi | 74% | 2835 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 50,865 psi | 78% | 2851 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,513 psi | 70% | 2769 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,672 psi | 69% | 2756 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,206 psi | 65% | 2674 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,028 psi | 57% | 2720 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 47,935 psi | 74% | 2858 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 43% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,672 psi | 69% | 2717 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,647 psi | 78% | 2815 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 44,353 psi | 68% | 2726 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,077 psi | 68% | 2707 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 43,874 psi | 67% | 2805 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 48,225 psi | 74% | 2762 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,456 psi | 71% | 2749 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 30,139 psi | 46% | 2398 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 44,802 psi | 69% | 2756 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 35,375 psi | 54% | 2664 fps | 95.7% |
| Norma MRP | 73.3 gr | 80% | 36,506 psi | 56% | 2654 fps | 96.4% |
| Norma URP | <<locked>> | 80% | 45,701 psi | 70% | 2769 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 40,727 psi | 63% | 2746 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 44,628 psi | 69% | 2766 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 36,434 psi | 56% | 2621 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,442 psi | 44% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,775 psi | 72% | 2805 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,860 psi | 69% | 2822 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,881 psi | 52% | 2628 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,384 psi | 73% | 2923 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,650 psi | 83% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,917 psi | 66% | 2690 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 38,363 psi | 59% | 2635 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,255 psi | 76% | 2789 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,225 psi | 74% | 2762 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,456 psi | 71% | 2749 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,114 psi | 85% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,534 psi | 82% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,224 psi | 73% | 2710 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,029 psi | 59% | 2628 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 53,476 psi | 82% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,918 psi | 68% | 2684 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 42,801 psi | 66% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,943 psi | 60% | 2618 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,082 psi | 79% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,195 psi | 73% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,071 psi | 55% | 2546 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 46,528 psi | 72% | 2769 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,623 psi | 58% | 2628 fps | 99.4% |
| Vihtavuori N560 | 78.8 gr | 86% | 45,237 psi | 70% | 2835 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 42,235 psi | 65% | 2756 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 48,588 psi | 75% | 2930 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,238 psi | 71% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,472 psi | 75% | 2838 fps | 99.3% |
| Winchester StaBALL HD | 72.5 gr | 80% | 29,834 psi | 46% | 2562 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,058 psi | 59% | 2598 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 80 powders for .300 PRC loaded with the .308 | 180gr | Speer TBBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,117 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 180.0 gr projectile in 0.308" calls for a 1:13.0 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 | 180gr | Speer TBBC 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.