Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 145gr | Speer Boat-Tail 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, Alliant Reloder-26 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>> | 96% | 57,217 psi | 90% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,027 psi | 86% | 3005 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,795 psi | 86% | 3107 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 94% | 55,898 psi | 88% | 3114 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 56,173 psi | 88% | 2966 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,767 psi | 87% | 3058 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 57,159 psi | 90% | 3117 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,863 psi | 75% | 2940 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,569 psi | 67% | 2890 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,493 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,622 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,869 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,129 psi | 86% | 3041 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,058 psi | 89% | 3110 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,549 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3084 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,752 psi | 86% | 3117 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,941 psi | 88% | 3091 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3012 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 57,058 psi | 89% | 3110 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 57,522 psi | 90% | 3005 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,939 psi | 83% | 3035 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 56,579 psi | 89% | 3058 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,593 psi | 87% | 3012 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 57,305 psi | 90% | 3054 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,014 psi | 88% | 3035 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,159 psi | 88% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,576 psi | 82% | 3146 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 57,406 psi | 90% | 3097 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 58% | 1903 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,419 psi | 87% | 2986 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,347 psi | 87% | 2972 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 55,201 psi | 87% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,723 psi | 86% | 2979 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 96% | 55,042 psi | 86% | 3091 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 56,072 psi | 88% | 2976 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,522 psi | 90% | 3018 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 2979 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 56,420 psi | 88% | 3045 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 38,189 psi | 60% | 2808 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 57,014 psi | 89% | 3136 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 56,884 psi | 89% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,535 psi | 87% | 3110 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 55,825 psi | 87% | 3041 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,896 psi | 84% | 3041 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 1949 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,550 psi | 89% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,810 psi | 86% | 3025 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,971 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,330 psi | 84% | 3143 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 55,158 psi | 86% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,029 psi | 89% | 3025 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 54,650 psi | 86% | 3028 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 57,522 psi | 90% | 3005 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,072 psi | 88% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,522 psi | 90% | 3018 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,710 psi | 89% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,027 psi | 86% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,288 psi | 87% | 2923 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,215 psi | 85% | 3025 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 54,766 psi | 86% | 2946 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,882 psi | 86% | 2956 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 57,406 psi | 90% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,245 psi | 87% | 3002 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 56,101 psi | 88% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,303 psi | 87% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,694 psi | 86% | 2979 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 54,505 psi | 85% | 2986 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,869 psi | 89% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,811 psi | 89% | 3130 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3104 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,824 psi | 86% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,782 psi | 89% | 3061 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,695 psi | 87% | 3166 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,071 psi | 86% | 2995 fps | 98.9% |
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% | 33,344 psi | 52% | 2552 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 44,788 psi | 70% | 2828 fps | 99.8% |
| Accurate High Country | 67.2 gr | 86% | 44,599 psi | 70% | 2913 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 90% | 48,486 psi | 76% | 2976 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 52,678 psi | 83% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,871 psi | 62% | 2746 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 88% | 43,642 psi | 68% | 2858 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 44,686 psi | 70% | 2871 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 35,041 psi | 55% | 2697 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,925 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,786 psi | 67% | 2831 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,458 psi | 78% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,958 psi | 63% | 2743 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,814 psi | 64% | 2802 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,966 psi | 50% | 2585 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,763 psi | 50% | 2598 fps | 95.9% |
| Alliant Reloder-26 | 64.4 gr | 80% | 34,853 psi | 55% | 2717 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 40,263 psi | 63% | 2789 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 43,294 psi | 68% | 2884 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 40,814 psi | 64% | 2802 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 47,659 psi | 75% | 2835 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 42,902 psi | 67% | 2838 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 46,325 psi | 73% | 2874 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,907 psi | 77% | 2890 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 46,630 psi | 73% | 2864 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,788 psi | 72% | 2848 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,379 psi | 63% | 2713 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,724 psi | 59% | 2805 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,919 psi | 72% | 2894 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 43% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,989 psi | 67% | 2756 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,008 psi | 77% | 2861 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 42,612 psi | 67% | 2769 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,223 psi | 71% | 2802 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 44,715 psi | 70% | 2894 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 46,572 psi | 73% | 2808 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 44,788 psi | 70% | 2792 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 32,590 psi | 51% | 2533 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 42,917 psi | 67% | 2792 fps | 96.2% |
| Norma 217 | <<locked>> | 98% | 35,679 psi | 56% | 2743 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 34,708 psi | 54% | 2680 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 43,859 psi | 69% | 2812 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 44,744 psi | 70% | 2907 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 42,714 psi | 67% | 2802 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,173 psi | 58% | 2710 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,504 psi | 82% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,570 psi | 70% | 2844 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,888 psi | 67% | 2861 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,679 psi | 54% | 2717 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 51,634 psi | 81% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,150 psi | 69% | 2789 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 82% | 39,189 psi | 61% | 2726 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 47,659 psi | 75% | 2835 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,572 psi | 73% | 2808 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 44,788 psi | 70% | 2792 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,953 psi | 83% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,793 psi | 81% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,513 psi | 71% | 2753 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,841 psi | 61% | 2720 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 51,605 psi | 81% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,254 psi | 76% | 2838 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 40,741 psi | 64% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,217 psi | 58% | 2651 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 49,298 psi | 77% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,382 psi | 71% | 2812 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,854 psi | 58% | 2635 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,773 psi | 70% | 2812 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,839 psi | 56% | 2661 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 46,108 psi | 72% | 2930 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 94% | 46,151 psi | 72% | 2913 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,338 psi | 69% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,514 psi | 73% | 2877 fps | 98.7% |
| Winchester StaBALL HD | 61.8 gr | 80% | 28,326 psi | 44% | 2579 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,001 psi | 61% | 2690 fps | 95.1% |
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 81 powders for 7 mm Weath. Mag. loaded with the .284 | 145gr | Speer Boat-Tail. Winchester StaBALL HD delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,166 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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 145.0 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, 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, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 7 mm Weath. Mag. with the .284 | 145gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N570 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.