Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Barnes XLC BT 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, Accurate MAGPRO and Accurate High Country.
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% | 54,636 psi | 86% | 3005 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 55,941 psi | 88% | 3045 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,216 psi | 87% | 3143 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 94% | 55,970 psi | 88% | 3140 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 82% | 56,275 psi | 88% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,680 psi | 87% | 3084 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 57,043 psi | 89% | 3140 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,298 psi | 76% | 2963 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,381 psi | 68% | 2927 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,767 psi | 87% | 3094 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,985 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,245 psi | 87% | 3068 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,130 psi | 90% | 3140 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,578 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3117 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,984 psi | 86% | 3156 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,043 psi | 88% | 3123 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 3048 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 57,130 psi | 90% | 3140 fps | 98.9% |
| Bofors RP7 | <<locked>> | 84% | 54,650 psi | 86% | 2979 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 3058 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 56,869 psi | 89% | 3087 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 55,912 psi | 88% | 3038 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 57,145 psi | 90% | 3077 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,912 psi | 88% | 3054 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,449 psi | 88% | 3018 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,881 psi | 83% | 3176 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 57,232 psi | 90% | 3123 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 58% | 1923 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,680 psi | 87% | 3015 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,651 psi | 87% | 3002 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 55,869 psi | 88% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,868 psi | 86% | 3005 fps | 97% |
| IMR 7828 SSC | <<locked>> | 96% | 54,998 psi | 86% | 3117 fps | 97.6% |
| Lovex S065 | <<locked>> | 86% | 56,608 psi | 89% | 3005 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 54,940 psi | 86% | 2999 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3018 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 56,463 psi | 88% | 3068 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,334 psi | 62% | 2858 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 57,043 psi | 89% | 3169 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 57,232 psi | 90% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,564 psi | 87% | 3133 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 55,999 psi | 88% | 3074 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 54,012 psi | 85% | 3071 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 60% | 1969 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,376 psi | 88% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,492 psi | 87% | 3061 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,884 psi | 89% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3176 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 56,173 psi | 88% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,058 psi | 89% | 3051 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 92% | 54,911 psi | 86% | 3061 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 84% | 54,650 psi | 86% | 2979 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,608 psi | 89% | 3005 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 54,940 psi | 86% | 2999 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,927 psi | 89% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,477 psi | 87% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,927 psi | 88% | 2956 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,462 psi | 85% | 3054 fps | 98.5% |
| Somchem S355 | <<locked>> | 82% | 55,767 psi | 87% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,434 psi | 87% | 2986 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 57,580 psi | 90% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,912 psi | 88% | 3038 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 56,782 psi | 89% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,666 psi | 87% | 3012 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,071 psi | 86% | 3012 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 86% | 54,882 psi | 86% | 3018 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,551 psi | 90% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,797 psi | 89% | 3156 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 3133 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,708 psi | 86% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,145 psi | 90% | 3091 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,100 psi | 86% | 3202 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,434 psi | 87% | 3028 fps | 98.5% |
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% | 35,186 psi | 55% | 2615 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 46,122 psi | 72% | 2874 fps | 99.7% |
| Accurate High Country | 65.3 gr | 86% | 45,252 psi | 71% | 2949 fps | 95.4% |
| Accurate MAGPRO | 71.2 gr | 92% | 52,402 psi | 82% | 3077 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 53,069 psi | 83% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 43,294 psi | 68% | 2844 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 90% | 47,065 psi | 74% | 2953 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 45,223 psi | 71% | 2897 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 36,289 psi | 57% | 2743 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,453 psi | 68% | 2871 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,893 psi | 78% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,698 psi | 64% | 2779 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,626 psi | 65% | 2841 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,170 psi | 52% | 2635 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,025 psi | 52% | 2651 fps | 95.9% |
| Alliant Reloder-26 | 62.6 gr | 80% | 36,100 psi | 57% | 2772 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 41,147 psi | 64% | 2831 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 44,208 psi | 69% | 2927 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 41,626 psi | 65% | 2841 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 48,385 psi | 76% | 2867 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 43,671 psi | 68% | 2871 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 47,007 psi | 74% | 2910 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 49,313 psi | 77% | 2920 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 50,125 psi | 79% | 2953 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 49,240 psi | 77% | 2940 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,292 psi | 65% | 2756 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 41,118 psi | 64% | 2913 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 46,180 psi | 72% | 2927 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 44% | 1719 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,758 psi | 69% | 2792 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,356 psi | 77% | 2887 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 43,627 psi | 68% | 2815 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 48,631 psi | 76% | 2890 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 45,368 psi | 71% | 2927 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,442 psi | 74% | 2844 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 45,948 psi | 72% | 2835 fps | 98.3% |
| Lovex S071 | <<locked>> | 82% | 32,576 psi | 51% | 2549 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 43,613 psi | 68% | 2825 fps | 95.8% |
| Norma 217 | <<locked>> | 98% | 36,941 psi | 58% | 2795 fps | 95% |
| Norma MRP | <<locked>> | 82% | 38,319 psi | 60% | 2792 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 44,817 psi | 70% | 2854 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 45,353 psi | 71% | 2940 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 43,482 psi | 68% | 2841 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 88% | 38,247 psi | 60% | 2753 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 45% | 1762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,707 psi | 83% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,585 psi | 71% | 2887 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,497 psi | 68% | 2897 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 38,261 psi | 60% | 2831 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 52,881 psi | 83% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,831 psi | 70% | 2822 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 40,103 psi | 63% | 2766 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 48,385 psi | 76% | 2867 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,442 psi | 74% | 2844 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 45,948 psi | 72% | 2835 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,461 psi | 84% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,257 psi | 82% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,514 psi | 73% | 2789 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,453 psi | 67% | 2822 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,359 psi | 82% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,834 psi | 77% | 2867 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,814 psi | 66% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,450 psi | 60% | 2697 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,198 psi | 79% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,093 psi | 72% | 2848 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 40,321 psi | 63% | 2733 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 45,759 psi | 72% | 2854 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 37,434 psi | 59% | 2723 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 46,557 psi | 73% | 2963 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 46,992 psi | 74% | 2953 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,875 psi | 70% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,224 psi | 74% | 2913 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,907 psi | 47% | 2648 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 42,569 psi | 67% | 2789 fps | 95.7% |
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 79 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Barnes XLC BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,202 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,202 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 140.0 gr projectile in 0.284" calls for a 1:10.5 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. Alliant Reloder-26, Accurate MAGPRO, Accurate High Country rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Barnes XLC BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Vihtavuori N170 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.