Load Specifications
Load data in caliber 7 mm PRC with .284 | 175gr | Speer Grand Slam bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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>> | 92% | 55,651 psi | 86% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,826 psi | 87% | 2766 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,348 psi | 88% | 2894 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 58,073 psi | 89% | 2897 fps | 99% |
| ADI AR 2209 | <<locked>> | 90% | 57,435 psi | 88% | 2828 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,288 psi | 85% | 2838 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,142 psi | 82% | 2802 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,718 psi | 73% | 2769 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,725 psi | 89% | 2828 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,725 psi | 89% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,072 psi | 88% | 2818 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,550 psi | 85% | 2835 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,072 psi | 88% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,463 psi | 87% | 2864 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,667 psi | 89% | 2890 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,623 psi | 87% | 2799 fps | 97.4% |
| Bofors RP15 | <<locked>> | 96% | 58,320 psi | 90% | 2871 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,130 psi | 86% | 2874 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 55,550 psi | 85% | 2835 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 58,581 psi | 90% | 2766 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,740 psi | 90% | 2887 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 58,131 psi | 89% | 2818 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,014 psi | 88% | 2779 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 58,784 psi | 90% | 2831 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,725 psi | 89% | 2815 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,943 psi | 89% | 2740 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,405 psi | 85% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,824 psi | 84% | 2802 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 58% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,811 psi | 87% | 2756 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,434 psi | 87% | 2736 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,985 psi | 88% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,898 psi | 86% | 2759 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 57,130 psi | 88% | 2874 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,381 psi | 67% | 2677 fps | 97.7% |
| Lovex S065 | <<locked>> | 84% | 57,217 psi | 88% | 2733 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,376 psi | 85% | 2730 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,985 psi | 88% | 2759 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,841 psi | 89% | 2812 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 43,584 psi | 67% | 2703 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 55,564 psi | 85% | 2854 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,552 psi | 90% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,320 psi | 90% | 2900 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 86% | 57,493 psi | 88% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,594 psi | 87% | 2831 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 59% | 1768 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,927 psi | 88% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,129 psi | 85% | 2815 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,985 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,245 psi | 85% | 2897 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 90% | 58,537 psi | 90% | 2799 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 56,681 psi | 87% | 2808 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 58,581 psi | 90% | 2766 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,217 psi | 88% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,376 psi | 85% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,217 psi | 86% | 2687 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,260 psi | 87% | 2805 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 56,144 psi | 86% | 2736 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 55,912 psi | 86% | 2753 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,130 psi | 88% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,159 psi | 88% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,782 psi | 87% | 2740 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,608 psi | 87% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 55,912 psi | 86% | 2746 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,564 psi | 85% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,274 psi | 85% | 2851 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 96% | 55,230 psi | 85% | 2835 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,999 psi | 86% | 2897 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,852 psi | 81% | 2884 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,956 psi | 86% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,378 psi | 90% | 2822 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,390 psi | 85% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,898 psi | 88% | 2776 fps | 99.9% |
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% | 37,231 psi | 57% | 2428 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 49,574 psi | 76% | 2661 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,480 psi | 62% | 2592 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 82% | 40,872 psi | 63% | 2592 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 41,220 psi | 63% | 2549 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 82% | 39,436 psi | 61% | 2543 fps | 96% |
| ADI AR 2217 | <<locked>> | 90% | 38,189 psi | 59% | 2516 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 86% | 30,226 psi | 47% | 2362 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,640 psi | 64% | 2549 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,398 psi | 73% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,249 psi | 63% | 2543 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,115 psi | 57% | 2490 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,969 psi | 55% | 2454 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,082 psi | 48% | 2375 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,668 psi | 61% | 2595 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,079 psi | 72% | 2635 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 34,635 psi | 53% | 2431 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 34,940 psi | 54% | 2470 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 37,115 psi | 57% | 2490 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 51,735 psi | 80% | 2661 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,405 psi | 56% | 2474 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 51,068 psi | 79% | 2710 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,316 psi | 82% | 2723 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 39,276 psi | 60% | 2490 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,537 psi | 59% | 2474 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,860 psi | 69% | 2552 fps | 100% |
| Hodgdon Retumbo | 58.9 gr | 82% | 32,489 psi | 50% | 2454 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 50,923 psi | 78% | 2740 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 43% | 1539 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,007 psi | 72% | 2598 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,866 psi | 81% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,152 psi | 73% | 2608 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,872 psi | 63% | 2490 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 38,014 psi | 58% | 2520 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,534 psi | 55% | 2503 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 50,604 psi | 78% | 2635 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,950 psi | 75% | 2628 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 32,155 psi | 49% | 2310 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 47,340 psi | 73% | 2644 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 31,183 psi | 48% | 2415 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 39,015 psi | 60% | 2559 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 48,414 psi | 74% | 2648 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,710 psi | 58% | 2530 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 47,268 psi | 73% | 2648 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,343 psi | 48% | 2352 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 44% | 1578 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,705 psi | 76% | 2687 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,863 psi | 74% | 2703 fps | 100% |
| ReloadSwiss RS 76 | 63 gr | 82% | 31,430 psi | 48% | 2425 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,785 psi | 63% | 2638 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,482 psi | 65% | 2526 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 40,741 psi | 63% | 2533 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,735 psi | 80% | 2661 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,604 psi | 78% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,950 psi | 75% | 2628 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,574 psi | 76% | 2589 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,408 psi | 62% | 2530 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 43,308 psi | 67% | 2520 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 45,672 psi | 70% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,162 psi | 63% | 2513 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,722 psi | 83% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,792 psi | 77% | 2638 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,795 psi | 55% | 2395 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 49,197 psi | 76% | 2644 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,205 psi | 62% | 2526 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,044 psi | 60% | 2549 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 39,523 psi | 61% | 2549 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 42,148 psi | 65% | 2651 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 49,197 psi | 76% | 2822 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,979 psi | 75% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,285 psi | 79% | 2713 fps | 99.9% |
| Winchester StaBALL HD | 59 gr | 80% | 32,430 psi | 50% | 2487 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,681 psi | 58% | 2444 fps | 96.8% |
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 73 powders for 7 mm PRC loaded with the .284 | 175gr | Speer Grand Slam. Hodgdon Retumbo delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,943 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 7 mm PRC with the .284 | 175gr | 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.