Load Specifications
Load data in caliber .300 PRC with .308 | 159gr | Hasler ARIETE bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, 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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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 2495 | <<locked>> | 82% | 57,508 psi | 88% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,376 psi | 85% | 3012 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,189 psi | 90% | 3117 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 58,189 psi | 90% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,144 psi | 86% | 3107 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,058 psi | 88% | 3212 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 86% | 58,349 psi | 90% | 3084 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,261 psi | 88% | 3159 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 54,998 psi | 85% | 3153 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 58,552 psi | 90% | 3215 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,782 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,753 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,058 psi | 88% | 3173 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,639 psi | 90% | 3192 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,724 psi | 87% | 3146 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 58,131 psi | 89% | 3209 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,955 psi | 85% | 3127 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,471 psi | 73% | 3054 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,405 psi | 85% | 3219 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,229 psi | 82% | 3127 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 56,550 psi | 87% | 3068 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 58,131 psi | 89% | 3209 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 55,956 psi | 86% | 3058 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 56,942 psi | 88% | 3087 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 58,479 psi | 90% | 3169 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 57,841 psi | 89% | 3127 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 55,085 psi | 85% | 3094 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,769 psi | 89% | 3136 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,479 psi | 88% | 3091 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,392 psi | 90% | 3123 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,586 psi | 72% | 3091 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 54,998 psi | 85% | 3140 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 56% | 1946 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,711 psi | 90% | 3087 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,624 psi | 89% | 3064 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,608 psi | 87% | 3048 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 57,188 psi | 88% | 3094 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,479 psi | 88% | 3084 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 56,449 psi | 87% | 3097 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,217 psi | 88% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,376 psi | 87% | 3077 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,333 psi | 87% | 3189 fps | 97.4% |
| Lovex S062 | <<locked>> | 84% | 57,914 psi | 89% | 3054 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,754 psi | 89% | 3081 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,637 psi | 86% | 3068 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,211 psi | 74% | 2953 fps | 99% |
| Norma 203B | <<locked>> | 84% | 58,740 psi | 90% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,407 psi | 90% | 3153 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 57,957 psi | 89% | 3235 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 58,465 psi | 90% | 3150 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,188 psi | 86% | 3087 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,101 psi | 88% | 3212 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 57,363 psi | 88% | 3150 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,894 psi | 78% | 3068 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 57% | 1988 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,753 psi | 87% | 3071 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 58,030 psi | 89% | 3182 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,130 psi | 86% | 3133 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,766 psi | 84% | 3163 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,775 psi | 72% | 3087 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 56,101 psi | 86% | 3015 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,623 psi | 87% | 3064 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,798 psi | 90% | 3130 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 56,057 psi | 86% | 3133 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 55,956 psi | 86% | 3058 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,754 psi | 89% | 3081 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 57,914 psi | 89% | 3054 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,637 psi | 86% | 3068 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 58,566 psi | 90% | 3127 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,290 psi | 88% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,348 psi | 88% | 3031 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,593 psi | 86% | 3127 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 56,449 psi | 87% | 3058 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,956 psi | 88% | 3058 fps | 96.7% |
| Somchem S365 | <<locked>> | 94% | 58,305 psi | 90% | 3150 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,565 psi | 87% | 3104 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 56,652 psi | 87% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,072 psi | 88% | 2989 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,972 psi | 89% | 3031 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,942 psi | 88% | 3091 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,014 psi | 86% | 3077 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 55,085 psi | 85% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,898 psi | 86% | 3087 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,188 psi | 88% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 58,059 psi | 89% | 3228 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,695 psi | 87% | 3048 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 58,479 psi | 90% | 3169 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,314 psi | 79% | 3202 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,884 psi | 88% | 3100 fps | 98.4% |
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 2495 | <<locked>> | 80% | 53,766 psi | 83% | 2930 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,735 psi | 80% | 2949 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 35,534 psi | 55% | 2684 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,024 psi | 78% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,334 psi | 61% | 2795 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 52,837 psi | 81% | 3133 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,269 psi | 74% | 2917 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 43,685 psi | 67% | 2900 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 47,805 psi | 74% | 3015 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,491 psi | 84% | 3153 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,936 psi | 75% | 2940 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,272 psi | 80% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,218 psi | 59% | 2808 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,947 psi | 68% | 2946 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,424 psi | 67% | 2894 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,077 psi | 68% | 2949 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,891 psi | 43% | 2533 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 34,011 psi | 52% | 2730 fps | 95.7% |
| Alliant Reloder-26 | 75.3 gr | 82% | 32,416 psi | 50% | 2720 fps | 95.8% |
| Bofors RP15 | <<locked>> | 94% | 43,453 psi | 67% | 2933 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 49,472 psi | 76% | 2953 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,077 psi | 68% | 2949 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 43,279 psi | 67% | 2818 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 49,719 psi | 76% | 2966 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 41,481 psi | 64% | 2848 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 44,454 psi | 68% | 2874 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 51,445 psi | 79% | 3028 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,198 psi | 77% | 3005 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,824 psi | 55% | 2694 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,723 psi | 84% | 3068 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,596 psi | 62% | 2946 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 40,509 psi | 62% | 2858 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 42% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,042 psi | 85% | 3028 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,778 psi | 78% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,142 psi | 82% | 2989 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,798 psi | 60% | 2736 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,730 psi | 69% | 2851 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 37,855 psi | 58% | 2746 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 53,635 psi | 83% | 3045 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,617 psi | 76% | 2959 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 48,907 psi | 75% | 3048 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,068 psi | 79% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,047 psi | 65% | 2795 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 40,350 psi | 62% | 2772 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 34,534 psi | 53% | 2657 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,590 psi | 79% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,309 psi | 68% | 2890 fps | 95.5% |
| Norma MRP | 76.6 gr | 86% | 37,507 psi | 58% | 2825 fps | 95% |
| Norma URP | <<locked>> | 80% | 39,189 psi | 60% | 2792 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 52,460 psi | 81% | 3028 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,701 psi | 70% | 2995 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 38,000 psi | 58% | 2772 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 40,524 psi | 62% | 2854 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 43% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,763 psi | 77% | 2949 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,717 psi | 72% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,378 psi | 61% | 2815 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,116 psi | 59% | 2825 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,292 psi | 62% | 2930 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 80% | 52,779 psi | 81% | 2963 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,499 psi | 72% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,443 psi | 75% | 2946 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 42,612 psi | 66% | 2877 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 43,279 psi | 67% | 2818 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,047 psi | 65% | 2795 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 51,068 psi | 79% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,350 psi | 62% | 2772 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,834 psi | 74% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,543 psi | 73% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,263 psi | 63% | 2736 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,250 psi | 65% | 2871 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,586 psi | 72% | 2890 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,806 psi | 77% | 2936 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,607 psi | 55% | 2740 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 40,292 psi | 62% | 2795 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 53,214 psi | 82% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,476 psi | 82% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,657 psi | 69% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,553 psi | 62% | 2792 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 39,943 psi | 61% | 2776 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 51,692 psi | 80% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,016 psi | 62% | 2792 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 31,053 psi | 48% | 2615 fps | 96.3% |
| Vihtavuori N560 | 83.8 gr | 94% | 50,459 psi | 78% | 3091 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,755 psi | 61% | 2759 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 41,655 psi | 64% | 2851 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,339 psi | 41% | 2559 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,699 psi | 66% | 2841 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 97 powders for .300 PRC loaded with the .308 | 159gr | Hasler ARIETE. Norma MRP delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,946 fps to 3,235 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 159.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2217, ADI AR 2225 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 PRC with the .308 | 159gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.