Load Specifications
Load data in caliber 7 mm PRC with .284 | 160gr | Speer Grand Slam bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Accurate High Country and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 94% | 55,056 psi | 85% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,434 psi | 87% | 2884 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,695 psi | 87% | 3002 fps | 99% |
| Accurate MAGPRO | <<locked>> | 94% | 57,653 psi | 89% | 3005 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,217 psi | 88% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,087 psi | 88% | 2940 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 96% | 58,813 psi | 90% | 3002 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,153 psi | 76% | 2838 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,888 psi | 68% | 2799 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,406 psi | 88% | 2936 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,813 psi | 90% | 2861 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,334 psi | 88% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 58,595 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,695 psi | 87% | 2930 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 58,711 psi | 90% | 2999 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,217 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,347 psi | 85% | 2972 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,579 psi | 87% | 3002 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,753 psi | 87% | 2904 fps | 96.3% |
| Bofors RP15 | <<locked>> | 98% | 57,537 psi | 89% | 2979 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,401 psi | 79% | 2910 fps | 98.6% |
| Bofors RP5 | <<locked>> | 96% | 58,711 psi | 90% | 2999 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 58,813 psi | 90% | 2884 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,273 psi | 83% | 2930 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 86% | 58,088 psi | 89% | 2936 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,985 psi | 88% | 2890 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 58,726 psi | 90% | 2940 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,609 psi | 89% | 2923 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,696 psi | 89% | 2858 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,331 psi | 84% | 3041 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 54,694 psi | 84% | 2917 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 57% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,753 psi | 87% | 2867 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,681 psi | 87% | 2854 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,666 psi | 87% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,825 psi | 86% | 2864 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 56,376 psi | 87% | 2976 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 57,348 psi | 88% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,332 psi | 85% | 2844 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,101 psi | 86% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,899 psi | 89% | 2927 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,494 psi | 61% | 2723 fps | 97.7% |
| Norma MRP | <<locked>> | 94% | 58,624 psi | 90% | 3018 fps | 100% |
| Norma URP | <<locked>> | 88% | 58,610 psi | 90% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,290 psi | 88% | 3002 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 57,348 psi | 88% | 2927 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,767 psi | 86% | 2936 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 58% | 1841 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 58,131 psi | 89% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,347 psi | 87% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 58,697 psi | 90% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,926 psi | 85% | 3038 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,995 psi | 77% | 2920 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 56,536 psi | 87% | 2828 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,450 psi | 90% | 2910 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 56,217 psi | 86% | 2920 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 58,813 psi | 90% | 2884 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,348 psi | 88% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,332 psi | 85% | 2844 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 58,146 psi | 89% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,405 psi | 87% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,434 psi | 87% | 2805 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,782 psi | 86% | 2913 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,246 psi | 87% | 2825 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,391 psi | 87% | 2848 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 55,274 psi | 85% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,724 psi | 87% | 2890 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 57,334 psi | 88% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,623 psi | 87% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,347 psi | 87% | 2871 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 55,666 psi | 86% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 58,465 psi | 90% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 58,363 psi | 90% | 3015 fps | 98.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 58,073 psi | 89% | 2992 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 51,068 psi | 79% | 2927 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,144 psi | 86% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,378 psi | 90% | 2940 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 58,059 psi | 89% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,782 psi | 87% | 2887 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% | 34,345 psi | 53% | 2464 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 46,035 psi | 71% | 2717 fps | 100% |
| Accurate High Country | 61.1 gr | 82% | 39,914 psi | 61% | 2684 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 88% | 46,572 psi | 72% | 2812 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 53,780 psi | 83% | 2785 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,363 psi | 59% | 2589 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 86% | 41,945 psi | 65% | 2697 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 94% | 40,335 psi | 62% | 2657 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 33,968 psi | 52% | 2556 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,740 psi | 60% | 2592 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 55,245 psi | 85% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,005 psi | 68% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,923 psi | 78% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,392 psi | 59% | 2585 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,709 psi | 56% | 2585 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,040 psi | 51% | 2493 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,747 psi | 44% | 2395 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,042 psi | 55% | 2625 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,374 psi | 82% | 2844 fps | 95.5% |
| Bofors RP15 | <<locked>> | 84% | 36,405 psi | 56% | 2575 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 39,160 psi | 60% | 2671 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 36,709 psi | 56% | 2585 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 48,776 psi | 75% | 2720 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 38,609 psi | 59% | 2618 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 47,659 psi | 73% | 2766 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 50,082 psi | 77% | 2779 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 44,846 psi | 69% | 2703 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,990 psi | 68% | 2687 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,713 psi | 64% | 2608 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,492 psi | 56% | 2657 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 47,137 psi | 73% | 2789 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1604 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,135 psi | 68% | 2654 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,951 psi | 77% | 2743 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 43,932 psi | 68% | 2667 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,627 psi | 67% | 2644 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 86% | 40,335 psi | 62% | 2674 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,659 psi | 73% | 2697 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 45,963 psi | 71% | 2684 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 29,617 psi | 46% | 2339 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 44,179 psi | 68% | 2690 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 34,577 psi | 53% | 2602 fps | 95.8% |
| Norma MRP | 59.6 gr | 80% | 35,781 psi | 55% | 2592 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 45,165 psi | 69% | 2703 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,900 psi | 61% | 2677 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,019 psi | 68% | 2700 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 35,679 psi | 55% | 2559 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 44% | 1644 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 54,143 psi | 83% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,093 psi | 71% | 2740 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,237 psi | 68% | 2756 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,301 psi | 51% | 2569 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,195 psi | 71% | 2851 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,040 psi | 82% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,755 psi | 61% | 2572 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 37,768 psi | 58% | 2569 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 48,776 psi | 75% | 2720 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,659 psi | 73% | 2697 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 45,963 psi | 71% | 2684 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,418 psi | 84% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,939 psi | 81% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,717 psi | 72% | 2644 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,449 psi | 58% | 2566 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 52,852 psi | 81% | 2772 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,279 psi | 67% | 2618 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 42,148 psi | 65% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,261 psi | 59% | 2552 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 50,560 psi | 78% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,528 psi | 72% | 2697 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,563 psi | 55% | 2487 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 46,006 psi | 71% | 2703 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,028 psi | 57% | 2566 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 86% | 44,425 psi | 68% | 2769 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 41,466 psi | 64% | 2690 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 47,558 psi | 73% | 2861 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,687 psi | 70% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,863 psi | 74% | 2769 fps | 99.4% |
| Winchester StaBALL HD | 59 gr | 80% | 29,356 psi | 45% | 2507 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,507 psi | 58% | 2536 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 79 powders for 7 mm PRC loaded with the .284 | 160gr | Speer Grand Slam. Winchester StaBALL HD delivers the highest muzzle velocity at 3,051 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,051 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 160.0 gr projectile in 0.284" calls for a 1:13.0 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. Winchester StaBALL HD, Accurate High Country, Norma MRP rank at the top here: for 7 mm PRC with the .284 | 160gr | Speer Grand Slam they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.