Load Specifications
Load data in caliber .300 PRC with .308 | 170gr | Speer Hot-Cor bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Winchester StaBALL HD.
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>> | 96% | 58,001 psi | 89% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,492 psi | 85% | 3009 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,608 psi | 87% | 3117 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 56,463 psi | 87% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,304 psi | 87% | 3061 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 57,812 psi | 89% | 3123 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,501 psi | 75% | 2946 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,279 psi | 67% | 2900 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,986 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,434 psi | 87% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,638 psi | 89% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,912 psi | 86% | 3051 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,711 psi | 89% | 3117 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,303 psi | 85% | 3038 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,520 psi | 84% | 3091 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,637 psi | 86% | 3123 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,855 psi | 87% | 3100 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,604 psi | 78% | 3022 fps | 97.7% |
| Bofors RP5 | <<locked>> | 96% | 57,711 psi | 89% | 3117 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 57,899 psi | 89% | 3009 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,388 psi | 82% | 3041 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 57,188 psi | 88% | 3061 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 56,318 psi | 87% | 3018 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 57,870 psi | 89% | 3061 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,811 psi | 87% | 3045 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,739 psi | 87% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,476 psi | 82% | 3156 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 57,899 psi | 89% | 3100 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 57% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,999 psi | 86% | 2992 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,941 psi | 86% | 2979 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 55,869 psi | 86% | 2999 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,798 psi | 90% | 3041 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 55,651 psi | 86% | 3097 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 56,565 psi | 87% | 2979 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 58,262 psi | 90% | 3025 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,172 psi | 85% | 2986 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,130 psi | 88% | 3051 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 38,754 psi | 60% | 2815 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 57,827 psi | 89% | 3143 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,667 psi | 89% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,478 psi | 87% | 3120 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 56,565 psi | 87% | 3051 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,694 psi | 84% | 3048 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,782 psi | 58% | 1949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 58,740 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,101 psi | 88% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,564 psi | 85% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,783 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,114 psi | 83% | 3153 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 55,753 psi | 86% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,551 psi | 89% | 3031 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 55,245 psi | 85% | 3038 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 57,899 psi | 89% | 3009 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,565 psi | 87% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 58,262 psi | 90% | 3025 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,290 psi | 88% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,535 psi | 85% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,811 psi | 86% | 2927 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 58,668 psi | 90% | 3091 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 55,390 psi | 85% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,564 psi | 85% | 2963 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 58,204 psi | 90% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,970 psi | 86% | 3012 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 56,521 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,709 psi | 86% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,361 psi | 85% | 2989 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 58,639 psi | 90% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,537 psi | 89% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,638 psi | 89% | 3136 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,377 psi | 88% | 3110 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,230 psi | 85% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,392 psi | 88% | 3064 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,724 psi | 87% | 3173 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,970 psi | 86% | 3009 fps | 99% |
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% | 33,721 psi | 52% | 2559 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 45,237 psi | 70% | 2831 fps | 99.8% |
| Accurate MAGPRO | 85 gr | 90% | 49,081 psi | 76% | 2982 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 53,142 psi | 82% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,364 psi | 62% | 2753 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 44,164 psi | 68% | 2864 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 45,426 psi | 70% | 2884 fps | 96% |
| ADI AR 2225 | <<locked>> | 94% | 35,563 psi | 55% | 2703 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,346 psi | 84% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,192 psi | 66% | 2835 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,082 psi | 77% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,364 psi | 62% | 2746 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,595 psi | 59% | 2743 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,387 psi | 50% | 2589 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 32,227 psi | 50% | 2605 fps | 96.1% |
| Alliant Reloder-26 | 76.4 gr | 80% | 35,259 psi | 54% | 2720 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 40,915 psi | 63% | 2795 fps | 95.7% |
| Bofors RP30 | <<locked>> | 94% | 41,046 psi | 63% | 2828 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 38,595 psi | 59% | 2743 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,037 psi | 74% | 2838 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 40,683 psi | 63% | 2782 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 46,963 psi | 72% | 2881 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 49,458 psi | 76% | 2900 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 47,224 psi | 73% | 2871 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,340 psi | 71% | 2854 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,886 psi | 63% | 2720 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,203 psi | 59% | 2812 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 46,369 psi | 71% | 2900 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 43% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,453 psi | 67% | 2762 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,429 psi | 76% | 2864 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 42,989 psi | 66% | 2772 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,658 psi | 70% | 2805 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 45,281 psi | 70% | 2900 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 47,021 psi | 72% | 2815 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 45,208 psi | 70% | 2795 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 33,083 psi | 51% | 2543 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 43,395 psi | 67% | 2795 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 36,318 psi | 56% | 2753 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 35,128 psi | 54% | 2684 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 44,353 psi | 68% | 2815 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 42,119 psi | 65% | 2844 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 43,207 psi | 66% | 2808 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,608 psi | 58% | 2713 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 55,129 psi | 85% | 2963 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,214 psi | 82% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,150 psi | 69% | 2851 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,308 psi | 67% | 2864 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,143 psi | 54% | 2723 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,185 psi | 80% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,541 psi | 69% | 2792 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 39,610 psi | 61% | 2730 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,037 psi | 74% | 2838 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,021 psi | 72% | 2815 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 45,208 psi | 70% | 2795 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,505 psi | 82% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,185 psi | 80% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,992 psi | 71% | 2756 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,262 psi | 60% | 2723 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 52,098 psi | 80% | 2900 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,484 psi | 70% | 2779 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 41,307 psi | 64% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,681 psi | 58% | 2657 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 49,748 psi | 77% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,788 psi | 70% | 2815 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 37,318 psi | 57% | 2641 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 45,121 psi | 69% | 2815 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 36,274 psi | 56% | 2667 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 46,731 psi | 72% | 2936 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 46,702 psi | 72% | 2920 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,875 psi | 69% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,963 psi | 72% | 2881 fps | 98.7% |
| Winchester StaBALL HD | 73.4 gr | 80% | 28,703 psi | 44% | 2585 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,552 psi | 61% | 2697 fps | 95.3% |
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 82 powders for .300 PRC loaded with the .308 | 170gr | Speer Hot-Cor. Winchester StaBALL HD delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,173 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 170.0 gr projectile in 0.308" calls for a 1:14.5 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. Accurate MAGPRO, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for .300 PRC with the .308 | 170gr | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 7977 Enduron, IMR 8133 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.