Load Specifications
Load data in caliber .300 PRC with .308 | 168gr | Sierra MatchKing bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,912 psi | 86% | 3009 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 57,580 psi | 89% | 3054 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 58,523 psi | 90% | 3163 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 84% | 58,784 psi | 90% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 58,407 psi | 90% | 3107 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 55,898 psi | 86% | 3100 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,891 psi | 72% | 2923 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,640 psi | 64% | 2874 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,449 psi | 87% | 2986 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 58,305 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,811 psi | 86% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,725 psi | 89% | 3094 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,695 psi | 86% | 3100 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,724 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,373 psi | 81% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,406 psi | 88% | 3169 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 58,508 psi | 90% | 3143 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 57,464 psi | 88% | 3002 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,414 psi | 74% | 2995 fps | 97% |
| Bofors RP5 | <<locked>> | 96% | 55,695 psi | 86% | 3100 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 56,579 psi | 87% | 2999 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,721 psi | 80% | 3022 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 57,580 psi | 89% | 3025 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,564 psi | 85% | 3048 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 58,218 psi | 90% | 3061 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 55,970 psi | 86% | 3041 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 58,610 psi | 90% | 3084 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 58,465 psi | 90% | 3028 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,430 psi | 79% | 3130 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 56,043 psi | 86% | 3084 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 57% | 1906 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 58,160 psi | 89% | 2995 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,957 psi | 89% | 3035 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,827 psi | 89% | 3022 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,769 psi | 89% | 3041 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,232 psi | 88% | 3028 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 57,377 psi | 88% | 3140 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 58,494 psi | 90% | 2989 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 58,450 psi | 90% | 3022 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,492 psi | 87% | 3012 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,359 psi | 82% | 2969 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 55,361 psi | 85% | 3031 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 55,724 psi | 86% | 3123 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 55,767 psi | 86% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 58,305 psi | 90% | 3163 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 58,523 psi | 90% | 3094 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,565 psi | 87% | 3094 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 58% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,217 psi | 88% | 3009 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,071 psi | 85% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,450 psi | 88% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,840 psi | 86% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,924 psi | 80% | 3127 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 57,754 psi | 89% | 3002 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,854 psi | 86% | 3015 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 57,232 psi | 88% | 3081 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 56,579 psi | 87% | 2999 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 58,450 psi | 90% | 3022 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 58,494 psi | 90% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,492 psi | 87% | 3012 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,622 psi | 86% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,653 psi | 89% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,870 psi | 89% | 2969 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,782 psi | 87% | 3074 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 57,377 psi | 88% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,696 psi | 89% | 3005 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 56,086 psi | 86% | 3038 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,754 psi | 89% | 3054 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 58,697 psi | 90% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,841 psi | 89% | 3028 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,276 psi | 88% | 3028 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 56,826 psi | 87% | 3028 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,492 psi | 85% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,608 psi | 86% | 3114 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,216 psi | 85% | 3091 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,450 psi | 88% | 2986 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,767 psi | 86% | 3051 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 58,479 psi | 90% | 3219 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,798 psi | 89% | 3045 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% | 32,489 psi | 50% | 2539 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 43,743 psi | 67% | 2815 fps | 99.6% |
| Accurate MAGPRO | 85.1 gr | 92% | 50,749 psi | 78% | 3028 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,880 psi | 80% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,814 psi | 64% | 2799 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 45,716 psi | 70% | 2910 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 43,874 psi | 67% | 2858 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 36,579 psi | 56% | 2743 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,011 psi | 82% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,916 psi | 64% | 2822 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,298 psi | 74% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,727 psi | 64% | 2792 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,697 psi | 61% | 2785 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,183 psi | 48% | 2569 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,067 psi | 48% | 2582 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,823 psi | 52% | 2697 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 42,148 psi | 65% | 2838 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 53,896 psi | 83% | 2949 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,192 psi | 65% | 2867 fps | 95.2% |
| Bofors RP5 | <<locked>> | 86% | 39,697 psi | 61% | 2785 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 46,717 psi | 72% | 2822 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 42,018 psi | 65% | 2822 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 53,838 psi | 83% | 2966 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,397 psi | 70% | 2864 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,095 psi | 74% | 2884 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 48,921 psi | 75% | 2917 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,964 psi | 74% | 2897 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,479 psi | 61% | 2703 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,392 psi | 61% | 2858 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 44,846 psi | 69% | 2884 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 1706 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,621 psi | 84% | 2943 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,177 psi | 65% | 2746 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,109 psi | 74% | 2851 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 41,756 psi | 64% | 2762 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,369 psi | 73% | 2851 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 46,862 psi | 72% | 2943 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 54,955 psi | 85% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,701 psi | 70% | 2802 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 44,048 psi | 68% | 2785 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 31,850 psi | 49% | 2520 fps | 95% |
| Norma 204 | <<locked>> | 80% | 42,119 psi | 65% | 2779 fps | 95.6% |
| Norma MRP | 74.5 gr | 82% | 36,347 psi | 56% | 2733 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 43,076 psi | 66% | 2805 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 43,598 psi | 67% | 2890 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 41,887 psi | 64% | 2795 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 39,073 psi | 60% | 2762 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 43% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,592 psi | 82% | 2949 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,256 psi | 79% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,555 psi | 67% | 2831 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,974 psi | 65% | 2848 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,274 psi | 56% | 2766 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 50,821 psi | 78% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,195 psi | 71% | 2838 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 40,930 psi | 63% | 2772 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 46,717 psi | 72% | 2822 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,701 psi | 70% | 2802 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 54,955 psi | 85% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 44,048 psi | 68% | 2785 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,069 psi | 80% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,952 psi | 78% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,817 psi | 69% | 2746 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,567 psi | 62% | 2766 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,604 psi | 78% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,195 psi | 73% | 2825 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,769 psi | 61% | 2756 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,463 psi | 56% | 2638 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 48,515 psi | 75% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,425 psi | 68% | 2802 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 38,421 psi | 59% | 2677 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 43,801 psi | 67% | 2802 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 35,012 psi | 54% | 2651 fps | 98.4% |
| Vihtavuori N560 | 81.7 gr | 90% | 48,254 psi | 74% | 2982 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 44,875 psi | 69% | 2897 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,468 psi | 67% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,542 psi | 70% | 2867 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,702 psi | 43% | 2559 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,814 psi | 63% | 2736 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 85 powders for .300 PRC loaded with the .308 | 168gr | Sierra MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,219 fps. ADI AR 2217 gives the best case fill at 100 %, and 85 of the 85 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 168.0 gr projectile in 0.308" calls for a 1:13.5 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 PRC with the .308 | 168gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, 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.