Load Specifications
Load data in caliber .300 PRC with .308 | 170gr | Impala RNFP KO bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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% | 57,696 psi | 89% | 3005 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,347 psi | 85% | 2986 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,477 psi | 85% | 3084 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 58,610 psi | 90% | 2986 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,537 psi | 90% | 3084 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 56,376 psi | 87% | 3084 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,894 psi | 78% | 2979 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,803 psi | 70% | 2940 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,552 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,231 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,262 psi | 90% | 3074 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,724 psi | 87% | 3087 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,827 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,116 psi | 88% | 3120 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,711 psi | 90% | 3159 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 55,666 psi | 86% | 3068 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,563 psi | 82% | 3061 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 56,724 psi | 87% | 3087 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 56,942 psi | 88% | 2976 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,898 psi | 86% | 3071 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 84% | 56,115 psi | 86% | 3028 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 58,494 psi | 90% | 3038 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 56,449 psi | 87% | 3025 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,216 psi | 85% | 3002 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,608 psi | 86% | 2956 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,985 psi | 86% | 3189 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 56,275 psi | 87% | 3061 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 58% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,088 psi | 89% | 3009 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,928 psi | 89% | 2995 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 58,784 psi | 90% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,276 psi | 88% | 3002 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 58,015 psi | 89% | 3123 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 55,825 psi | 86% | 2949 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,363 psi | 88% | 2995 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,755 psi | 90% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,738 psi | 86% | 3012 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 41,872 psi | 64% | 2874 fps | 97.5% |
| Norma MRP | <<locked>> | 92% | 56,724 psi | 87% | 3114 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 56,666 psi | 87% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,071 psi | 85% | 3084 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 86% | 55,405 psi | 85% | 3015 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 57,551 psi | 89% | 3081 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 59% | 1946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,421 psi | 90% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,173 psi | 86% | 3081 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,913 psi | 88% | 3189 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,141 psi | 80% | 3068 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 82% | 58,755 psi | 90% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,231 psi | 87% | 2992 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 57,841 psi | 89% | 3064 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 56,942 psi | 88% | 2976 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,825 psi | 86% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,363 psi | 88% | 2995 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,711 psi | 89% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,436 psi | 90% | 2949 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,392 psi | 88% | 3058 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 57,986 psi | 89% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,885 psi | 89% | 2986 fps | 97.8% |
| Somchem S365 | <<locked>> | 88% | 57,101 psi | 88% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,610 psi | 90% | 3035 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 55,622 psi | 86% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,262 psi | 90% | 3005 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,088 psi | 89% | 3015 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 57,537 psi | 89% | 3012 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,203 psi | 88% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,376 psi | 87% | 3100 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 98% | 56,579 psi | 87% | 3084 fps | 98.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,982 psi | 82% | 3071 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,522 psi | 88% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,333 psi | 87% | 3031 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,695 psi | 86% | 3150 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 58,363 psi | 90% | 3028 fps | 99.2% |
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% | 37,289 psi | 57% | 2625 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 48,704 psi | 75% | 2874 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 48,559 psi | 75% | 2959 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 55,245 psi | 85% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,147 psi | 62% | 2730 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 88% | 46,499 psi | 72% | 2900 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 44,802 psi | 69% | 2854 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 36,027 psi | 55% | 2700 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,600 psi | 70% | 2867 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,620 psi | 81% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,277 psi | 62% | 2726 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,754 psi | 60% | 2733 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,099 psi | 54% | 2641 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,922 psi | 48% | 2546 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,421 psi | 59% | 2785 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 41,002 psi | 63% | 2782 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 41,437 psi | 64% | 2822 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 38,754 psi | 60% | 2733 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 50,560 psi | 78% | 2867 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 43,062 psi | 66% | 2822 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 49,443 psi | 76% | 2910 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 51,634 psi | 79% | 2920 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 46,441 psi | 71% | 2841 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,585 psi | 70% | 2825 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,569 psi | 67% | 2753 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 38,551 psi | 59% | 2805 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 48,979 psi | 75% | 2936 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 43% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,818 psi | 70% | 2792 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,358 psi | 79% | 2884 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 45,963 psi | 71% | 2812 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 45,179 psi | 70% | 2782 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 44,860 psi | 69% | 2874 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 49,487 psi | 76% | 2841 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 48,051 psi | 74% | 2835 fps | 99% |
| Lovex S071 | <<locked>> | 80% | 32,445 psi | 50% | 2503 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 45,803 psi | 70% | 2828 fps | 96.9% |
| Norma 217 | <<locked>> | 96% | 37,057 psi | 57% | 2756 fps | 95.7% |
| Norma MRP | 73.1 gr | 80% | 37,971 psi | 58% | 2740 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 47,094 psi | 72% | 2854 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 44,831 psi | 69% | 2887 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 45,759 psi | 70% | 2841 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 37,927 psi | 58% | 2703 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,095 psi | 74% | 2887 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,861 psi | 71% | 2897 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,505 psi | 55% | 2717 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 48,530 psi | 75% | 3002 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 55,317 psi | 85% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 44,106 psi | 68% | 2766 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 39,711 psi | 61% | 2717 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 50,560 psi | 78% | 2867 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,487 psi | 76% | 2841 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 48,051 psi | 74% | 2835 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,288 psi | 84% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,559 psi | 75% | 2789 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,392 psi | 61% | 2710 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 54,679 psi | 84% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 48,022 psi | 74% | 2812 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 44,338 psi | 68% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,538 psi | 62% | 2703 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 52,431 psi | 81% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,443 psi | 75% | 2844 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 37,521 psi | 58% | 2628 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 47,993 psi | 74% | 2851 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,610 psi | 61% | 2726 fps | 99.4% |
| Vihtavuori N560 | 78.6 gr | 86% | 46,267 psi | 71% | 2910 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 43,845 psi | 67% | 2844 fps | 95% |
| Vihtavuori N568 | <<locked>> | 98% | 49,632 psi | 76% | 3009 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,268 psi | 73% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,632 psi | 76% | 2913 fps | 99.1% |
| Winchester StaBALL HD | 72.3 gr | 80% | 31,633 psi | 49% | 2664 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,392 psi | 61% | 2677 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 78 powders for .300 PRC loaded with the .308 | 170gr | Impala RNFP KO. Hodgdon Retumbo delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,189 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:12.5 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, Norma MRP, Vihtavuori N560 rank at the top here: for .300 PRC with the .308 | 170gr | Impala RNFP KO they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, Vihtavuori N170, Vihtavuori N570 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.