Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 145gr | Speer Hot-Cor bullet and 74 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>> | 96% | 57,522 psi | 90% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,100 psi | 86% | 3005 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,202 psi | 88% | 3117 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 56,246 psi | 88% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,854 psi | 88% | 3058 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 57,479 psi | 90% | 3123 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,109 psi | 75% | 2943 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,786 psi | 67% | 2894 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,624 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,999 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,246 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,405 psi | 87% | 3045 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,319 psi | 90% | 3114 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,853 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3087 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,100 psi | 86% | 3120 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,202 psi | 88% | 3094 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 3015 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 57,319 psi | 90% | 3114 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 57,580 psi | 90% | 3005 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 3041 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 56,898 psi | 89% | 3058 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,912 psi | 88% | 3015 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 57,290 psi | 90% | 3054 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,304 psi | 88% | 3038 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,275 psi | 88% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,866 psi | 83% | 3150 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 57,406 psi | 90% | 3097 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 1903 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,738 psi | 87% | 2989 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,666 psi | 87% | 2976 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 55,564 psi | 87% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,737 psi | 86% | 2979 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 96% | 55,100 psi | 86% | 3094 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 56,130 psi | 88% | 2972 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,317 psi | 85% | 2966 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 2982 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 56,739 psi | 89% | 3045 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 38,406 psi | 60% | 2815 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 57,290 psi | 90% | 3140 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,217 psi | 90% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,854 psi | 88% | 3117 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 56,173 psi | 88% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,172 psi | 85% | 3045 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,782 psi | 59% | 1949 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,652 psi | 89% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,172 psi | 86% | 3028 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,276 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 3150 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 55,259 psi | 87% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,101 psi | 89% | 3025 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 54,940 psi | 86% | 3035 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 57,580 psi | 90% | 3005 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,130 psi | 88% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,317 psi | 85% | 2966 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,811 psi | 89% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,361 psi | 87% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,347 psi | 87% | 2923 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,505 psi | 85% | 3031 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 55,114 psi | 86% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,158 psi | 86% | 2959 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 57,522 psi | 90% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,579 psi | 87% | 3009 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 56,231 psi | 88% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,405 psi | 87% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,940 psi | 86% | 2982 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 54,578 psi | 86% | 2986 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,971 psi | 89% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,130 psi | 90% | 3133 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3107 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,853 psi | 86% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,116 psi | 90% | 3064 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,086 psi | 88% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,347 psi | 87% | 2999 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% | 33,446 psi | 52% | 2556 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 44,889 psi | 70% | 2828 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 48,733 psi | 76% | 2979 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 52,794 psi | 83% | 2913 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,132 psi | 63% | 2749 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 88% | 43,729 psi | 69% | 2858 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 44,947 psi | 70% | 2877 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 35,259 psi | 55% | 2703 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,070 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,902 psi | 67% | 2831 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,559 psi | 78% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,059 psi | 63% | 2743 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,915 psi | 64% | 2802 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,082 psi | 50% | 2585 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,981 psi | 50% | 2602 fps | 96% |
| Alliant Reloder-26 | 64.6 gr | 80% | 34,969 psi | 55% | 2717 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 40,538 psi | 64% | 2792 fps | 95.6% |
| Bofors RP30 | <<locked>> | 96% | 43,598 psi | 68% | 2887 fps | 96% |
| Bofors RP5 | <<locked>> | 86% | 40,915 psi | 64% | 2802 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 47,747 psi | 75% | 2835 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 43,163 psi | 68% | 2841 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 46,630 psi | 73% | 2881 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 49,226 psi | 77% | 2897 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 46,920 psi | 74% | 2871 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,890 psi | 72% | 2851 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,495 psi | 63% | 2713 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,971 psi | 60% | 2812 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 45,977 psi | 72% | 2894 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 44% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,265 psi | 68% | 2759 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,081 psi | 77% | 2864 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 42,714 psi | 67% | 2772 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,484 psi | 71% | 2808 fps | 95.3% |
| IMR 7828 SSC | 67.9 gr | 90% | 45,005 psi | 71% | 2900 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 46,688 psi | 73% | 2808 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 44,904 psi | 70% | 2795 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 32,837 psi | 51% | 2539 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,221 psi | 68% | 2795 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 35,897 psi | 56% | 2746 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 34,780 psi | 55% | 2680 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 43,976 psi | 69% | 2815 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 41,814 psi | 66% | 2841 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 42,989 psi | 67% | 2808 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,391 psi | 59% | 2713 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,649 psi | 83% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,860 psi | 70% | 2848 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,989 psi | 67% | 2861 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,722 psi | 54% | 2717 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 51,764 psi | 81% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,237 psi | 69% | 2789 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 82% | 39,276 psi | 62% | 2726 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 47,747 psi | 75% | 2835 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,688 psi | 73% | 2808 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 44,904 psi | 70% | 2795 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,316 psi | 84% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,895 psi | 81% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,629 psi | 72% | 2753 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,928 psi | 61% | 2720 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 51,706 psi | 81% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,179 psi | 71% | 2776 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 41,075 psi | 64% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,478 psi | 59% | 2654 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 49,400 psi | 77% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,484 psi | 71% | 2812 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,970 psi | 58% | 2635 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,889 psi | 70% | 2812 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,969 psi | 56% | 2667 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 46,369 psi | 73% | 2933 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 46,209 psi | 72% | 2913 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,643 psi | 70% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,630 psi | 73% | 2881 fps | 98.7% |
| Winchester StaBALL HD | 62.1 gr | 80% | 28,543 psi | 45% | 2585 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,088 psi | 61% | 2690 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 74 powders for 7 mm Weath. Mag. loaded with the .284 | 145gr | Speer Hot-Cor. Winchester StaBALL HD delivers the highest muzzle velocity at 3,169 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,169 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 1:13.0 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. Alliant Reloder-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Weath. Mag. with the .284 | 145gr | Speer Hot-Cor 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.