Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 150gr | Sierra MatchKing bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, 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.
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% | 54,230 psi | 85% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,666 psi | 87% | 2966 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,738 psi | 87% | 3081 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 94% | 56,666 psi | 89% | 3081 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 56,739 psi | 89% | 2927 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,478 psi | 89% | 3022 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 54,215 psi | 85% | 3022 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,646 psi | 76% | 2913 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,337 psi | 68% | 2867 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,536 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,809 psi | 84% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,072 psi | 88% | 3012 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,172 psi | 85% | 3018 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,419 psi | 87% | 2995 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,869 psi | 88% | 3087 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,811 psi | 89% | 3061 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 2986 fps | 98.1% |
| Bofors RP5 | <<locked>> | 94% | 54,172 psi | 85% | 3018 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 54,621 psi | 86% | 2913 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 3005 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 57,435 psi | 90% | 3022 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,362 psi | 88% | 2976 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 54,070 psi | 85% | 2959 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,826 psi | 89% | 3002 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,826 psi | 89% | 2946 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,592 psi | 84% | 3123 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 53,969 psi | 85% | 2995 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,231 psi | 88% | 2953 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,999 psi | 88% | 2936 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 56,101 psi | 88% | 2959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,317 psi | 87% | 2946 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 55,680 psi | 87% | 3058 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 56,536 psi | 89% | 2933 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,723 psi | 86% | 2927 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,087 psi | 89% | 3009 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 38,972 psi | 61% | 2789 fps | 97% |
| Norma MRP | <<locked>> | 92% | 53,925 psi | 85% | 3038 fps | 99.7% |
| Norma URP | <<locked>> | 86% | 54,070 psi | 85% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,608 psi | 89% | 3081 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 56,565 psi | 89% | 3009 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,810 psi | 86% | 3012 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1913 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,290 psi | 90% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,796 psi | 87% | 2992 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,998 psi | 85% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3117 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2989 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 82% | 55,869 psi | 88% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,711 psi | 90% | 2992 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 92% | 55,361 psi | 87% | 2999 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 54,621 psi | 86% | 2913 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,536 psi | 89% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,723 psi | 86% | 2927 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,246 psi | 90% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,811 psi | 87% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,028 psi | 88% | 2890 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,911 psi | 86% | 2992 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 55,434 psi | 87% | 2907 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,622 psi | 87% | 2927 fps | 97.7% |
| Somchem S365 | <<locked>> | 88% | 54,621 psi | 86% | 2956 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,043 psi | 88% | 2972 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 56,811 psi | 89% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,869 psi | 88% | 2940 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,463 psi | 87% | 2949 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 55,100 psi | 86% | 2946 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,711 psi | 90% | 3025 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,795 psi | 84% | 3031 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3074 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,521 psi | 87% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,711 psi | 90% | 3025 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,014 psi | 89% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,883 psi | 88% | 2966 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% | 33,895 psi | 53% | 2530 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 45,440 psi | 71% | 2795 fps | 99.9% |
| Accurate High Country | 64.8 gr | 84% | 42,076 psi | 66% | 2815 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 88% | 45,847 psi | 72% | 2884 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 53,432 psi | 84% | 2877 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,927 psi | 59% | 2657 fps | 95% |
| ADI AR 2213 | <<locked>> | 88% | 44,222 psi | 69% | 2828 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 96% | 42,627 psi | 67% | 2789 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 92% | 33,373 psi | 52% | 2612 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,381 psi | 68% | 2799 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,256 psi | 79% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,913 psi | 59% | 2654 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,609 psi | 61% | 2710 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,460 psi | 51% | 2556 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,211 psi | 47% | 2513 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,389 psi | 55% | 2690 fps | 98.4% |
| Bofors RP15 | <<locked>> | 86% | 38,319 psi | 60% | 2700 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 41,147 psi | 64% | 2795 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 38,609 psi | 61% | 2710 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 48,167 psi | 75% | 2799 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 40,698 psi | 64% | 2746 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 46,978 psi | 74% | 2841 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 49,530 psi | 78% | 2858 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 44,135 psi | 69% | 2776 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,369 psi | 73% | 2818 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,104 psi | 64% | 2684 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,305 psi | 60% | 2782 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 46,514 psi | 73% | 2864 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,659 psi | 43% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,656 psi | 68% | 2726 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,501 psi | 78% | 2825 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 43,192 psi | 68% | 2740 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,876 psi | 72% | 2776 fps | 95.7% |
| IMR 7828 SSC | 65.4 gr | 88% | 42,554 psi | 67% | 2805 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,094 psi | 74% | 2772 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 45,339 psi | 71% | 2762 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 31,169 psi | 49% | 2457 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 43,526 psi | 68% | 2762 fps | 96.7% |
| Norma 217 | <<locked>> | 98% | 36,361 psi | 57% | 2723 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 35,317 psi | 55% | 2657 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 44,440 psi | 70% | 2779 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 42,409 psi | 66% | 2815 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 43,352 psi | 68% | 2772 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 86% | 35,244 psi | 55% | 2621 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1709 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,403 psi | 84% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,252 psi | 71% | 2815 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,410 psi | 68% | 2825 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,259 psi | 55% | 2697 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,658 psi | 72% | 2920 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,286 psi | 82% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,858 psi | 66% | 2700 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 37,115 psi | 58% | 2635 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 48,167 psi | 75% | 2799 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,094 psi | 74% | 2772 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 45,339 psi | 71% | 2762 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,664 psi | 84% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,475 psi | 82% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,035 psi | 72% | 2720 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,436 psi | 62% | 2694 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,156 psi | 82% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,629 psi | 72% | 2749 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 41,553 psi | 65% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,739 psi | 59% | 2621 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 80% | 49,864 psi | 78% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,992 psi | 72% | 2779 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 37,289 psi | 58% | 2605 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 45,382 psi | 71% | 2779 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 36,405 psi | 57% | 2635 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 43,729 psi | 69% | 2838 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 92% | 43,700 psi | 68% | 2822 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,063 psi | 71% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,166 psi | 74% | 2844 fps | 99% |
| Winchester StaBALL HD | 61.1 gr | 80% | 28,819 psi | 45% | 2562 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,682 psi | 62% | 2664 fps | 95.8% |
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 75 powders for 7 mm Weath. Mag. loaded with the .284 | 150gr | Sierra MatchKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,133 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:11.5 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Weath. Mag. with the .284 | 150gr | Sierra MatchKing 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.