Load Specifications
Load data in caliber .300 PRC with .308 | 168gr | Hammer HHT bullet and 88 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 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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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 2700 | <<locked>> | 82% | 57,072 psi | 88% | 2969 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 56,695 psi | 87% | 3022 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,579 psi | 87% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 58,450 psi | 90% | 3068 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,579 psi | 86% | 3117 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 56,579 psi | 87% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,796 psi | 86% | 3064 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 57,203 psi | 88% | 3123 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,305 psi | 60% | 2815 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,595 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,754 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,666 psi | 86% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,072 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,187 psi | 85% | 3051 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,710 psi | 87% | 3117 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,682 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,806 psi | 77% | 3028 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 58,624 psi | 90% | 3192 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,579 psi | 86% | 3094 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 58,726 psi | 90% | 3022 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,498 psi | 70% | 2940 fps | 96.1% |
| Bofors RP5 | <<locked>> | 98% | 56,710 psi | 87% | 3117 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 57,711 psi | 89% | 3015 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,182 psi | 76% | 2972 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 55,085 psi | 85% | 2986 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,826 psi | 87% | 3068 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 56,072 psi | 86% | 3025 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 57,232 psi | 88% | 3061 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,115 psi | 86% | 3041 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,028 psi | 86% | 2992 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,704 psi | 75% | 3077 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 88% | 57,580 psi | 89% | 3110 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 56% | 1896 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,043 psi | 86% | 2966 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 58,421 psi | 90% | 3005 fps | 99.7% |
| IMR 4350 | <<locked>> | 90% | 55,680 psi | 86% | 2999 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,825 psi | 86% | 2989 fps | 99.5% |
| IMR 4831 | <<locked>> | 92% | 58,813 psi | 90% | 3058 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 58,537 psi | 90% | 3048 fps | 97.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 58,726 psi | 90% | 3163 fps | 98.4% |
| Lovex S062 | <<locked>> | 82% | 56,173 psi | 86% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,173 psi | 86% | 2986 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,754 psi | 89% | 3031 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,328 psi | 77% | 2923 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 57,058 psi | 88% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,666 psi | 87% | 3054 fps | 98.7% |
| Norma MRP | <<locked>> | 96% | 56,652 psi | 87% | 3143 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 57,000 psi | 88% | 3054 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 58,392 psi | 90% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,361 psi | 85% | 3117 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 55,840 psi | 86% | 3054 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,447 psi | 82% | 3045 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 57% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 58,813 psi | 90% | 3031 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,478 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 58,711 psi | 90% | 3094 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,072 psi | 88% | 3123 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,081 psi | 76% | 3071 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 82% | 57,972 psi | 89% | 2966 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 55,027 psi | 85% | 2966 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,232 psi | 88% | 3035 fps | 98% |
| Rottweil R 905 | <<locked>> | 96% | 58,305 psi | 90% | 3097 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 88% | 57,711 psi | 89% | 3015 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,173 psi | 86% | 2986 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,173 psi | 86% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,754 psi | 89% | 3031 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,869 psi | 87% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,608 psi | 86% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,637 psi | 86% | 2936 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,856 psi | 89% | 3094 fps | 99.1% |
| Somchem S355 | <<locked>> | 86% | 58,523 psi | 90% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,172 psi | 85% | 2966 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 57,043 psi | 88% | 3054 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 58,813 psi | 90% | 3068 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 58,639 psi | 90% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,784 psi | 90% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 56,304 psi | 87% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,274 psi | 85% | 2989 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 58,320 psi | 90% | 3045 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 82% | 56,942 psi | 88% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 58,160 psi | 89% | 3051 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,072 psi | 86% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,652 psi | 87% | 3133 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,982 psi | 80% | 3035 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,969 psi | 85% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,826 psi | 87% | 3068 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,563 psi | 84% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,230 psi | 85% | 3005 fps | 98.6% |
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 2700 | <<locked>> | 80% | 53,548 psi | 82% | 2913 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 32,401 psi | 50% | 2543 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 52,997 psi | 82% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,191 psi | 63% | 2766 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 51,706 psi | 80% | 3048 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 49,893 psi | 77% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,554 psi | 65% | 2815 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 46,615 psi | 72% | 2927 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 36,825 psi | 57% | 2749 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,763 psi | 78% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,172 psi | 83% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,842 psi | 61% | 2779 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,832 psi | 71% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,366 psi | 65% | 2805 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,161 psi | 62% | 2799 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,196 psi | 45% | 2516 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,169 psi | 48% | 2589 fps | 95% |
| Alliant Reloder-26 | 73.2 gr | 80% | 31,560 psi | 49% | 2638 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 42,583 psi | 66% | 2848 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,213 psi | 79% | 2910 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,453 psi | 65% | 2877 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 40,161 psi | 62% | 2799 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,643 psi | 69% | 2782 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 42,656 psi | 66% | 2835 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 51,605 psi | 79% | 2930 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,265 psi | 67% | 2822 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,977 psi | 71% | 2844 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 49,951 psi | 77% | 2936 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,965 psi | 75% | 2917 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,463 psi | 58% | 2664 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,842 psi | 61% | 2867 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,438 psi | 65% | 2835 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 42% | 1693 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,504 psi | 81% | 2910 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,810 psi | 84% | 2949 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 40,306 psi | 62% | 2707 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,267 psi | 71% | 2818 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 39,494 psi | 61% | 2717 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,327 psi | 74% | 2871 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 44,614 psi | 69% | 2900 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 52,866 psi | 81% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,569 psi | 67% | 2759 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,930 psi | 65% | 2743 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 33,765 psi | 52% | 2579 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 53,476 psi | 82% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,004 psi | 66% | 2802 fps | 95.8% |
| Norma MRP | 74.6 gr | 84% | 36,608 psi | 56% | 2740 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,886 psi | 63% | 2762 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 54,331 psi | 84% | 2986 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 44,338 psi | 68% | 2904 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 39,697 psi | 61% | 2749 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 39,552 psi | 61% | 2772 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 43% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,387 psi | 79% | 2913 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,704 psi | 75% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,249 psi | 63% | 2789 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,668 psi | 61% | 2799 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,579 psi | 56% | 2776 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 54,549 psi | 84% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,327 psi | 74% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,106 psi | 68% | 2795 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 41,611 psi | 64% | 2792 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,643 psi | 69% | 2782 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,569 psi | 67% | 2759 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 52,866 psi | 81% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,930 psi | 65% | 2743 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,734 psi | 77% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,095 psi | 76% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,772 psi | 66% | 2707 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,234 psi | 63% | 2785 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,327 psi | 74% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,254 psi | 74% | 2844 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 37,434 psi | 58% | 2713 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,796 psi | 57% | 2651 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 55,100 psi | 85% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 55,303 psi | 85% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,354 psi | 71% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,264 psi | 65% | 2759 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,885 psi | 60% | 2690 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,447 psi | 82% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,669 psi | 64% | 2759 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,677 psi | 50% | 2598 fps | 97.6% |
| Vihtavuori N560 | 81.7 gr | 92% | 49,095 psi | 76% | 2999 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 96% | 45,165 psi | 69% | 2904 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,423 psi | 64% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,453 psi | 67% | 2825 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,715 psi | 40% | 2487 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,510 psi | 64% | 2753 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 93 powders for .300 PRC loaded with the .308 | 168gr | Hammer HHT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,192 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,192 fps. ADI AR 2217 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 53–90 %, 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-23 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, Alliant Reloder-26 rank at the top here: for .300 PRC with the .308 | 168gr | Hammer HHT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, Norma 217, ReloadSwiss RS 80 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.