Load Specifications
Load data in caliber .300 PRC with .308 | 180gr | Winchester FailSafe 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% | 56,043 psi | 86% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,377 psi | 88% | 2956 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 58,624 psi | 90% | 3077 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,783 psi | 89% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,059 psi | 89% | 3012 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 55,825 psi | 86% | 3018 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,111 psi | 77% | 2910 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,672 psi | 69% | 2864 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,088 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,492 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,421 psi | 88% | 2999 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,883 psi | 86% | 3012 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,087 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,275 psi | 87% | 3041 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,856 psi | 89% | 3074 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,450 psi | 88% | 2972 fps | 96.3% |
| Bofors RP15 | <<locked>> | 98% | 58,465 psi | 90% | 3051 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,359 psi | 81% | 2979 fps | 98.5% |
| Bofors RP5 | <<locked>> | 94% | 55,883 psi | 86% | 3012 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 55,695 psi | 86% | 2897 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,288 psi | 85% | 3002 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 55,085 psi | 85% | 2953 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,696 psi | 89% | 2966 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 55,608 psi | 86% | 2949 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 58,450 psi | 90% | 2995 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,378 psi | 90% | 2930 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,303 psi | 85% | 3117 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 55,535 psi | 85% | 2986 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 57% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,450 psi | 88% | 2940 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,145 psi | 88% | 2920 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 57,479 psi | 88% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,695 psi | 87% | 2936 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 57,508 psi | 88% | 3051 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 57,841 psi | 89% | 2920 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,028 psi | 86% | 2913 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,145 psi | 88% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 88% | 58,581 psi | 90% | 2995 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 40,306 psi | 62% | 2789 fps | 97.6% |
| Norma MRP | <<locked>> | 92% | 55,651 psi | 86% | 3031 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 55,477 psi | 85% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 58,334 psi | 90% | 3074 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 88% | 58,088 psi | 89% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,652 psi | 87% | 3005 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 58% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,377 psi | 88% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,622 psi | 86% | 3005 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,231 psi | 87% | 3117 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 50,908 psi | 78% | 2989 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 82% | 57,261 psi | 88% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,390 psi | 85% | 2923 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 57,014 psi | 88% | 2989 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 55,695 psi | 86% | 2897 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,841 psi | 89% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,028 psi | 86% | 2913 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 58,784 psi | 90% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,724 psi | 87% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,145 psi | 88% | 2874 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,565 psi | 87% | 2982 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 56,826 psi | 87% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,058 psi | 88% | 2917 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 56,115 psi | 86% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,537 psi | 89% | 2959 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 58,044 psi | 89% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,435 psi | 88% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,043 psi | 88% | 2940 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 56,536 psi | 87% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,608 psi | 86% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,463 psi | 85% | 3025 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 55,390 psi | 85% | 3005 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,098 psi | 80% | 2999 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,884 psi | 88% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,303 psi | 85% | 2953 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,013 psi | 85% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,421 psi | 88% | 2956 fps | 99.4% |
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% | 34,911 psi | 54% | 2523 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 46,688 psi | 72% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 47,413 psi | 73% | 2877 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 54,360 psi | 84% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,856 psi | 60% | 2651 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 42,525 psi | 65% | 2762 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 40,959 psi | 63% | 2720 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 92% | 34,360 psi | 53% | 2615 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,730 psi | 69% | 2789 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,605 psi | 79% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,914 psi | 60% | 2644 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,173 psi | 57% | 2644 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,504 psi | 52% | 2549 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,124 psi | 45% | 2448 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,753 psi | 57% | 2690 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,882 psi | 83% | 2913 fps | 95.4% |
| Bofors RP15 | <<locked>> | 86% | 39,479 psi | 61% | 2694 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 39,827 psi | 61% | 2733 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 37,173 psi | 57% | 2644 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 49,211 psi | 76% | 2785 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 39,117 psi | 60% | 2680 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 48,240 psi | 74% | 2831 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 50,821 psi | 78% | 2851 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,484 psi | 70% | 2769 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,599 psi | 69% | 2753 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,148 psi | 65% | 2671 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,985 psi | 57% | 2717 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 47,892 psi | 74% | 2858 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 43% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,628 psi | 69% | 2717 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,604 psi | 78% | 2812 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 44,309 psi | 68% | 2726 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,048 psi | 68% | 2707 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 43,671 psi | 67% | 2799 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 48,182 psi | 74% | 2762 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,412 psi | 71% | 2749 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 30,095 psi | 46% | 2398 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 44,744 psi | 69% | 2756 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 35,201 psi | 54% | 2661 fps | 95.6% |
| Norma MRP | 73.1 gr | 80% | 36,303 psi | 56% | 2648 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 45,658 psi | 70% | 2769 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 40,669 psi | 63% | 2746 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 44,599 psi | 69% | 2766 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 36,245 psi | 56% | 2618 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 44% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,543 psi | 72% | 2802 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,831 psi | 69% | 2822 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,837 psi | 52% | 2628 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,137 psi | 73% | 2917 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 53,606 psi | 82% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,873 psi | 66% | 2690 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 38,305 psi | 59% | 2631 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,211 psi | 76% | 2785 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,182 psi | 74% | 2762 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,412 psi | 71% | 2749 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,042 psi | 85% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,476 psi | 82% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,050 psi | 72% | 2707 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,985 psi | 58% | 2628 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 53,403 psi | 82% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,685 psi | 67% | 2677 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 42,757 psi | 66% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,914 psi | 60% | 2618 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,039 psi | 79% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,137 psi | 73% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,897 psi | 55% | 2543 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 46,485 psi | 72% | 2766 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,521 psi | 58% | 2628 fps | 99.4% |
| Vihtavuori N560 | 78.6 gr | 86% | 45,034 psi | 69% | 2831 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 42,192 psi | 65% | 2756 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 48,544 psi | 75% | 2930 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,166 psi | 71% | 2723 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,385 psi | 74% | 2835 fps | 99.3% |
| Winchester StaBALL HD | 72.4 gr | 80% | 29,805 psi | 46% | 2562 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,029 psi | 59% | 2595 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 | Winchester FailSafe. Hodgdon Retumbo delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,850 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 | Winchester FailSafe 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.