Load Specifications
Load data in caliber .300 PRC with .308 | 165gr | Speer Hot-Cor bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Alliant Reloder-26.
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% | 56,565 psi | 87% | 3045 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 58,015 psi | 89% | 3087 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,114 psi | 85% | 3130 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 82% | 55,434 psi | 85% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,013 psi | 85% | 3077 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 56,449 psi | 87% | 3136 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,326 psi | 73% | 2956 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,163 psi | 65% | 2907 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,869 psi | 87% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 58,755 psi | 90% | 3143 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,231 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 58,146 psi | 89% | 3123 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,275 psi | 87% | 3133 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,406 psi | 88% | 3110 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,069 psi | 82% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 58,233 psi | 90% | 3205 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,434 psi | 85% | 3117 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 58,044 psi | 89% | 3038 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,124 psi | 76% | 3031 fps | 97.1% |
| Bofors RP5 | <<locked>> | 96% | 56,275 psi | 87% | 3133 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 56,811 psi | 87% | 3031 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,069 psi | 80% | 3051 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 58,088 psi | 89% | 3058 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,927 psi | 86% | 3081 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 55,187 psi | 85% | 3038 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 56,550 psi | 87% | 3077 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,521 psi | 85% | 3061 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,448 psi | 85% | 3009 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,040 psi | 80% | 3169 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 56,492 psi | 87% | 3117 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 57% | 1929 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 58,363 psi | 90% | 3028 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 58,494 psi | 90% | 3071 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 58,291 psi | 90% | 3054 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 58,363 psi | 90% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,624 psi | 89% | 3061 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 58,175 psi | 89% | 3179 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 55,477 psi | 85% | 2999 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 57,087 psi | 88% | 3048 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,795 psi | 83% | 3002 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 55,883 psi | 86% | 3068 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 56,289 psi | 87% | 3159 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 56,405 psi | 87% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,940 psi | 85% | 3133 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 55,303 psi | 85% | 3071 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,363 psi | 88% | 3130 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,666 psi | 58% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,624 psi | 89% | 3041 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,622 psi | 86% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 58,189 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,318 psi | 87% | 3136 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,591 psi | 81% | 3163 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 58,088 psi | 89% | 3035 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,362 psi | 87% | 3048 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 57,740 psi | 89% | 3114 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 56,811 psi | 87% | 3031 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,477 psi | 85% | 2999 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 57,087 psi | 88% | 3048 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,101 psi | 86% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 58,030 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 58,436 psi | 90% | 3005 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,290 psi | 88% | 3110 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 57,711 psi | 89% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 58,175 psi | 89% | 3041 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 56,753 psi | 87% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 58,407 psi | 90% | 3087 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 55,405 psi | 85% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 58,218 psi | 90% | 3061 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,841 psi | 89% | 3061 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 57,392 psi | 88% | 3064 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,086 psi | 86% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,173 psi | 86% | 3150 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,854 psi | 86% | 3123 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 58,030 psi | 89% | 3018 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,130 psi | 86% | 3084 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,766 psi | 84% | 3189 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 58,552 psi | 90% | 3084 fps | 99.1% |
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% | 32,822 psi | 50% | 2566 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 44,121 psi | 68% | 2848 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 51,271 psi | 79% | 3061 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 52,170 psi | 80% | 2940 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,235 psi | 65% | 2828 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 46,166 psi | 71% | 2940 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 44,324 psi | 68% | 2890 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 36,956 psi | 57% | 2772 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,272 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,177 psi | 65% | 2851 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,834 psi | 75% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,134 psi | 65% | 2822 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,248 psi | 62% | 2818 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,531 psi | 49% | 2598 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,430 psi | 48% | 2612 fps | 95.2% |
| Alliant Reloder-26 | 76.4 gr | 80% | 34,214 psi | 53% | 2726 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 42,482 psi | 65% | 2867 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 54,302 psi | 84% | 2982 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,743 psi | 66% | 2900 fps | 95.2% |
| Bofors RP5 | <<locked>> | 86% | 40,248 psi | 62% | 2818 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 47,108 psi | 72% | 2854 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 42,496 psi | 65% | 2854 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 54,215 psi | 83% | 2999 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,905 psi | 71% | 2897 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 48,457 psi | 75% | 2917 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 49,371 psi | 76% | 2949 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,443 psi | 75% | 2930 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,900 psi | 61% | 2736 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,813 psi | 61% | 2887 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 45,194 psi | 70% | 2913 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 1729 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,911 psi | 84% | 2972 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,554 psi | 65% | 2776 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,515 psi | 75% | 2884 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 41,989 psi | 65% | 2789 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,732 psi | 73% | 2881 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 47,282 psi | 73% | 2976 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 46,093 psi | 71% | 2831 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 44,266 psi | 68% | 2815 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 32,198 psi | 50% | 2549 fps | 95% |
| Norma 204 | <<locked>> | 80% | 42,409 psi | 65% | 2808 fps | 95.6% |
| Norma MRP | 76 gr | 82% | 36,637 psi | 56% | 2759 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 43,323 psi | 67% | 2835 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 44,164 psi | 68% | 2923 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,192 psi | 65% | 2825 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 39,421 psi | 61% | 2789 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 43% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,070 psi | 83% | 2982 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,837 psi | 80% | 3031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,034 psi | 68% | 2864 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,235 psi | 65% | 2877 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,680 psi | 56% | 2795 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 51,082 psi | 79% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,572 psi | 72% | 2867 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 41,379 psi | 64% | 2805 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,108 psi | 72% | 2854 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,093 psi | 71% | 2831 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 44,266 psi | 68% | 2815 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,388 psi | 81% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,256 psi | 79% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,092 psi | 69% | 2776 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,017 psi | 63% | 2799 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 51,068 psi | 79% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,601 psi | 73% | 2854 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,205 psi | 62% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,782 psi | 57% | 2667 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 48,747 psi | 75% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,773 psi | 69% | 2831 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 38,783 psi | 60% | 2707 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,121 psi | 68% | 2831 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 35,288 psi | 54% | 2677 fps | 98.3% |
| Vihtavuori N560 | 83.5 gr | 90% | 48,863 psi | 75% | 3015 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 94% | 45,426 psi | 70% | 2927 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,859 psi | 67% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,905 psi | 71% | 2897 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,934 psi | 43% | 2585 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,321 psi | 64% | 2772 fps | 95.5% |
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 83 powders for .300 PRC loaded with the .308 | 165gr | Speer Hot-Cor. Alliant Reloder-26 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,205 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 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 165.0 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. Vihtavuori N560, Norma MRP, Alliant Reloder-26 rank at the top here: for .300 PRC with the .308 | 165gr | Speer Hot-Cor 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.