Load Specifications
Load data in caliber 7 mm PRC with .284 | 170gr | Hammer HHT bullet and 80 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 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% | 57,276 psi | 88% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 58,697 psi | 90% | 2818 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,724 psi | 86% | 2884 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 56,347 psi | 87% | 2730 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,767 psi | 86% | 2825 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 96% | 57,217 psi | 88% | 2884 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,732 psi | 73% | 2723 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,511 psi | 65% | 2687 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,682 psi | 89% | 2749 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,811 psi | 86% | 2822 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,000 psi | 88% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 58,740 psi | 90% | 2864 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,058 psi | 88% | 2881 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 58,102 psi | 89% | 2844 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,693 psi | 83% | 2854 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 58,726 psi | 90% | 2940 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 58,769 psi | 90% | 2844 fps | 97% |
| Bofors RP15 | <<locked>> | 98% | 55,941 psi | 86% | 2864 fps | 99.6% |
| Bofors RP3 | <<locked>> | 82% | 58,610 psi | 90% | 2762 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,516 psi | 76% | 2795 fps | 98.5% |
| Bofors RP5 | <<locked>> | 96% | 57,058 psi | 88% | 2881 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 57,682 psi | 89% | 2769 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,721 psi | 81% | 2812 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 82% | 58,639 psi | 90% | 2785 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 56,681 psi | 87% | 2822 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,840 psi | 86% | 2779 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 57,029 psi | 88% | 2822 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,912 psi | 86% | 2805 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,086 psi | 86% | 2743 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,562 psi | 81% | 2920 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 57,101 psi | 88% | 2861 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 57% | 1719 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,434 psi | 85% | 2753 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,477 psi | 85% | 2740 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 55,419 psi | 85% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,146 psi | 89% | 2805 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 98% | 58,769 psi | 90% | 2920 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 56,159 psi | 86% | 2740 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,667 psi | 89% | 2785 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,491 psi | 84% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,579 psi | 87% | 2812 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 38,058 psi | 59% | 2615 fps | 97.6% |
| Norma MRP | <<locked>> | 94% | 56,942 psi | 88% | 2904 fps | 100% |
| Norma URP | <<locked>> | 88% | 57,014 psi | 88% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,564 psi | 85% | 2881 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 88% | 55,970 psi | 86% | 2812 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,812 psi | 89% | 2874 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 58% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 58,204 psi | 90% | 2776 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,550 psi | 87% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 58,639 psi | 90% | 2841 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,145 psi | 88% | 2874 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,055 psi | 82% | 2920 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,979 psi | 74% | 2802 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 55,434 psi | 85% | 2717 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,884 psi | 88% | 2792 fps | 99% |
| Rottweil R 905 | <<locked>> | 94% | 58,494 psi | 90% | 2858 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 86% | 57,682 psi | 89% | 2769 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,159 psi | 86% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,667 psi | 89% | 2785 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,666 psi | 87% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 58,610 psi | 90% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,245 psi | 85% | 2690 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 58,030 psi | 89% | 2851 fps | 99.8% |
| Somchem S355 | <<locked>> | 84% | 58,624 psi | 90% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 58,653 psi | 90% | 2789 fps | 98.7% |
| Somchem S365 | <<locked>> | 90% | 57,537 psi | 89% | 2805 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,303 psi | 85% | 2779 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 56,246 psi | 87% | 2684 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 58,813 psi | 90% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 58,363 psi | 90% | 2808 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 57,986 psi | 89% | 2799 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,768 psi | 87% | 2822 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,826 psi | 87% | 2897 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,173 psi | 86% | 2874 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,226 psi | 76% | 2808 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 58,537 psi | 90% | 2756 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,956 psi | 88% | 2825 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,448 psi | 85% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,187 psi | 85% | 2772 fps | 99.5% |
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% | 33,402 psi | 51% | 2365 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 44,860 psi | 69% | 2608 fps | 100% |
| Accurate MAGPRO | 62.2 gr | 88% | 45,034 psi | 69% | 2697 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 52,997 psi | 82% | 2680 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,420 psi | 58% | 2487 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 40,756 psi | 63% | 2589 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 39,291 psi | 60% | 2552 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 32,851 psi | 51% | 2454 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,230 psi | 83% | 2700 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,946 psi | 66% | 2615 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,530 psi | 76% | 2726 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,463 psi | 58% | 2484 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,578 psi | 55% | 2480 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,155 psi | 49% | 2398 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,978 psi | 43% | 2303 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,867 psi | 54% | 2523 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,967 psi | 80% | 2730 fps | 95.4% |
| Bofors RP15 | <<locked>> | 84% | 35,476 psi | 55% | 2477 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 55,027 psi | 85% | 2717 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 37,840 psi | 58% | 2566 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 35,578 psi | 55% | 2480 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 47,659 psi | 73% | 2612 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 37,608 psi | 58% | 2516 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 55,085 psi | 85% | 2736 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 46,485 psi | 72% | 2657 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 49,139 psi | 76% | 2671 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 43,598 psi | 67% | 2595 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,743 psi | 66% | 2579 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,640 psi | 63% | 2503 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,491 psi | 55% | 2556 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 45,876 psi | 71% | 2680 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,120 psi | 66% | 2546 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,110 psi | 76% | 2638 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 42,815 psi | 66% | 2559 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,598 psi | 66% | 2539 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 39,305 psi | 60% | 2569 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,760 psi | 72% | 2589 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 44,904 psi | 69% | 2579 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 28,819 psi | 44% | 2251 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 43,163 psi | 66% | 2585 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 33,431 psi | 51% | 2500 fps | 95.8% |
| Norma MRP | 55.5 gr | 80% | 34,708 psi | 53% | 2490 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 43,976 psi | 68% | 2595 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 38,841 psi | 60% | 2572 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,960 psi | 66% | 2595 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 34,621 psi | 53% | 2457 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 44% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,781 psi | 84% | 2723 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,605 psi | 81% | 2766 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,846 psi | 69% | 2631 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,989 psi | 66% | 2648 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,314 psi | 50% | 2467 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,382 psi | 68% | 2733 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 51,779 psi | 80% | 2667 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 38,943 psi | 60% | 2470 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 36,767 psi | 57% | 2470 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 47,659 psi | 73% | 2612 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,760 psi | 72% | 2589 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,904 psi | 69% | 2579 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,287 psi | 82% | 2723 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,953 psi | 80% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,585 psi | 70% | 2536 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,448 psi | 56% | 2464 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 51,808 psi | 80% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,163 psi | 65% | 2513 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 40,973 psi | 63% | 2556 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,362 psi | 57% | 2454 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 49,385 psi | 76% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,469 psi | 70% | 2592 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,650 psi | 53% | 2388 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 44,918 psi | 69% | 2598 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,071 psi | 55% | 2467 fps | 99.5% |
| Vihtavuori N560 | 59.7 gr | 86% | 43,047 psi | 66% | 2657 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 40,132 psi | 62% | 2585 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 45,919 psi | 71% | 2749 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,541 psi | 69% | 2556 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,731 psi | 72% | 2661 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,529 psi | 44% | 2408 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,477 psi | 56% | 2438 fps | 95.6% |
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 7 mm PRC loaded with the .284 | 170gr | Hammer HHT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,940 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 170.0 gr projectile in 0.284" calls for a 1:8.0 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, Accurate MAGPRO rank at the top here: for 7 mm PRC with the .284 | 170gr | Hammer HHT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, 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.