Load Specifications
Load data in caliber 7 mm PRC with .284 | 156gr | Lapua Naturalis bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 94% | 55,419 psi | 85% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,623 psi | 87% | 2917 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,072 psi | 88% | 3025 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 82% | 57,203 psi | 88% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,811 psi | 87% | 2966 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 58,262 psi | 90% | 3028 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,023 psi | 75% | 2861 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,990 psi | 68% | 2825 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,624 psi | 90% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,913 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 58,247 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,246 psi | 87% | 2953 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 58,276 psi | 90% | 3022 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,825 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,911 psi | 84% | 2999 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,173 psi | 86% | 3031 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,188 psi | 88% | 3005 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,169 psi | 79% | 2936 fps | 98.2% |
| Bofors RP5 | <<locked>> | 96% | 58,276 psi | 90% | 3022 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 58,726 psi | 90% | 2913 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,954 psi | 83% | 2953 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 86% | 57,899 psi | 89% | 2966 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,724 psi | 87% | 2920 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 94% | 58,218 psi | 90% | 2963 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,159 psi | 88% | 2949 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,464 psi | 88% | 2890 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,983 psi | 83% | 3068 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 58,436 psi | 90% | 3005 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 57% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,623 psi | 87% | 2897 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,492 psi | 87% | 2881 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 56,681 psi | 87% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,738 psi | 86% | 2890 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 56,144 psi | 86% | 3005 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 57,363 psi | 88% | 2881 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,666 psi | 86% | 2881 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,449 psi | 87% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,725 psi | 89% | 2953 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,711 psi | 61% | 2756 fps | 97.4% |
| Norma MRP | <<locked>> | 94% | 58,131 psi | 89% | 3048 fps | 100% |
| Norma URP | <<locked>> | 88% | 58,189 psi | 90% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,782 psi | 87% | 3025 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 57,217 psi | 88% | 2956 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,114 psi | 85% | 2959 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 58% | 1864 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,667 psi | 89% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,333 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 58,305 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,679 psi | 84% | 3068 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,632 psi | 76% | 2943 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 56,898 psi | 88% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,030 psi | 89% | 2933 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 92% | 56,115 psi | 86% | 2946 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 58,726 psi | 90% | 2913 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,363 psi | 88% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,666 psi | 86% | 2881 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,943 psi | 89% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,159 psi | 86% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,521 psi | 87% | 2835 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,666 psi | 86% | 2943 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 56,260 psi | 87% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,217 psi | 86% | 2874 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 58,813 psi | 90% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,768 psi | 87% | 2920 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 57,537 psi | 89% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,434 psi | 87% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,101 psi | 86% | 2897 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 55,695 psi | 86% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 58,537 psi | 90% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,870 psi | 89% | 3041 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,943 psi | 89% | 3022 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,676 psi | 78% | 2949 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,724 psi | 86% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,189 psi | 90% | 2972 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,985 psi | 88% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,463 psi | 87% | 2913 fps | 99.2% |
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% | 35,230 psi | 54% | 2507 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 46,601 psi | 72% | 2756 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 46,470 psi | 71% | 2838 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 53,780 psi | 83% | 2818 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,667 psi | 59% | 2618 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 42,076 psi | 65% | 2723 fps | 95% |
| ADI AR 2217 | <<locked>> | 96% | 43,062 psi | 66% | 2740 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 34,272 psi | 53% | 2589 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 55,405 psi | 85% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,092 psi | 68% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,720 psi | 78% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,682 psi | 60% | 2615 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,941 psi | 57% | 2618 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,402 psi | 51% | 2530 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,385 psi | 45% | 2438 fps | 95.2% |
| Alliant Reloder-26 | 60.7 gr | 80% | 36,419 psi | 56% | 2664 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 39,276 psi | 60% | 2667 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 39,276 psi | 60% | 2700 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 36,941 psi | 57% | 2618 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,863 psi | 75% | 2749 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 92% | 41,481 psi | 64% | 2707 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 47,863 psi | 74% | 2799 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 50,198 psi | 77% | 2808 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 44,889 psi | 69% | 2730 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,077 psi | 68% | 2717 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,771 psi | 64% | 2638 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,811 psi | 57% | 2690 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 47,079 psi | 72% | 2818 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 43% | 1627 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,324 psi | 68% | 2680 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,024 psi | 77% | 2772 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 44,150 psi | 68% | 2697 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,700 psi | 67% | 2671 fps | 95.2% |
| IMR 7828 SSC | 62.4 gr | 88% | 43,163 psi | 66% | 2762 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 47,848 psi | 74% | 2726 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 46,369 psi | 71% | 2720 fps | 99% |
| Lovex S071 | <<locked>> | 80% | 30,574 psi | 47% | 2388 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 44,193 psi | 68% | 2717 fps | 97% |
| Norma 217 | <<locked>> | 96% | 34,969 psi | 54% | 2635 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 36,114 psi | 56% | 2625 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 45,440 psi | 70% | 2740 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 43,047 psi | 66% | 2772 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 44,048 psi | 68% | 2730 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 36,071 psi | 55% | 2592 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,708 psi | 83% | 2913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,238 psi | 71% | 2772 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,222 psi | 68% | 2785 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,692 psi | 52% | 2602 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,035 psi | 71% | 2874 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 53,447 psi | 82% | 2815 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,670 psi | 66% | 2657 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,000 psi | 58% | 2602 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,863 psi | 75% | 2749 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,848 psi | 74% | 2726 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 46,369 psi | 71% | 2720 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,273 psi | 83% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,997 psi | 82% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,920 psi | 72% | 2674 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,652 psi | 58% | 2595 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 52,924 psi | 81% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 46,383 psi | 71% | 2703 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 42,453 psi | 65% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,798 psi | 60% | 2589 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 50,807 psi | 78% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,789 psi | 72% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,853 psi | 55% | 2516 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 46,195 psi | 71% | 2736 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,666 psi | 58% | 2612 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 44,483 psi | 68% | 2799 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 44,585 psi | 69% | 2785 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 47,529 psi | 73% | 2890 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,687 psi | 70% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,863 psi | 74% | 2799 fps | 99.1% |
| Winchester StaBALL HD | 58.3 gr | 80% | 29,907 psi | 46% | 2546 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,768 psi | 58% | 2569 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 82 powders for 7 mm PRC loaded with the .284 | 156gr | Lapua Naturalis. Winchester StaBALL HD delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,077 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 155.0 gr projectile in 0.284" calls for a 1:10.0 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. Alliant Reloder-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm PRC with the .284 | 156gr | Lapua Naturalis they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, IMR 8133 Enduron 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.