Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Sellier & Bellot FMJ bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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% | 55,492 psi | 87% | 3035 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 56,942 psi | 89% | 3081 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,971 psi | 89% | 3189 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 94% | 53,882 psi | 84% | 3120 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 54,853 psi | 86% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,740 psi | 90% | 3133 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 55,550 psi | 87% | 3130 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,220 psi | 65% | 2894 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,259 psi | 85% | 3068 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,115 psi | 88% | 3015 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,012 psi | 85% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,187 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,188 psi | 90% | 3120 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,288 psi | 87% | 3127 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,217 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 3100 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,898 psi | 89% | 3199 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,215 psi | 85% | 3107 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 57,029 psi | 89% | 3035 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,935 psi | 75% | 3018 fps | 96.7% |
| Bofors RP5 | <<locked>> | 96% | 55,288 psi | 87% | 3127 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 56,188 psi | 88% | 3025 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,097 psi | 80% | 3041 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 57,159 psi | 90% | 3054 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,013 psi | 86% | 3074 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 84% | 54,230 psi | 85% | 3031 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,434 psi | 87% | 3064 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,462 psi | 85% | 3051 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,331 psi | 85% | 3002 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,894 psi | 80% | 3153 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 55,405 psi | 87% | 3110 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,624 psi | 90% | 3064 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,609 psi | 90% | 3051 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,305 psi | 90% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,637 psi | 89% | 3054 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,927 psi | 89% | 3166 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 54,505 psi | 85% | 2992 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,115 psi | 88% | 3041 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2992 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 54,911 psi | 86% | 3061 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 55,143 psi | 86% | 3150 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,361 psi | 87% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,737 psi | 84% | 3123 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,302 psi | 85% | 3064 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3117 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,811 psi | 89% | 3035 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,505 psi | 85% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,043 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,187 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 3156 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 57,363 psi | 90% | 3031 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,593 psi | 87% | 3045 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,724 psi | 89% | 3107 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,188 psi | 88% | 3025 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,505 psi | 85% | 2992 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,115 psi | 88% | 3041 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,259 psi | 87% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,203 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,609 psi | 90% | 3002 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,275 psi | 88% | 3104 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,971 psi | 89% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,203 psi | 90% | 3031 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,666 psi | 87% | 3068 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,305 psi | 90% | 3081 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,752 psi | 86% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,203 psi | 90% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,768 psi | 89% | 3054 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,579 psi | 89% | 3061 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,897 psi | 86% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,056 psi | 86% | 3140 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3110 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,869 psi | 89% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,259 psi | 87% | 3077 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,261 psi | 90% | 3071 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% | 32,242 psi | 51% | 2559 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 43,424 psi | 68% | 2844 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 46,108 psi | 72% | 2986 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 92% | 50,386 psi | 79% | 3054 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,474 psi | 81% | 2936 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,423 psi | 65% | 2818 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 45,353 psi | 71% | 2933 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 36,245 psi | 57% | 2762 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,698 psi | 65% | 2818 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,591 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,539 psi | 65% | 2848 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,950 psi | 75% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,278 psi | 65% | 2812 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,264 psi | 66% | 2874 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,937 psi | 48% | 2592 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,866 psi | 52% | 2664 fps | 95.9% |
| Alliant Reloder-26 | 64.2 gr | 80% | 33,431 psi | 52% | 2717 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 41,684 psi | 65% | 2858 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 53,374 psi | 84% | 2976 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,730 psi | 70% | 2956 fps | 95.8% |
| Bofors RP5 | <<locked>> | 88% | 42,264 psi | 66% | 2874 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,514 psi | 73% | 2851 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 44,585 psi | 70% | 2910 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 53,577 psi | 84% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,034 psi | 71% | 2890 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 47,674 psi | 75% | 2910 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 48,443 psi | 76% | 2940 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,587 psi | 75% | 2923 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,160 psi | 61% | 2730 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,015 psi | 61% | 2877 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 44,440 psi | 70% | 2907 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1726 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,829 psi | 66% | 2772 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,659 psi | 75% | 2877 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 41,379 psi | 65% | 2785 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,978 psi | 74% | 2877 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 46,383 psi | 73% | 2969 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 45,411 psi | 71% | 2828 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 43,627 psi | 68% | 2808 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 33,736 psi | 53% | 2602 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 41,713 psi | 65% | 2802 fps | 95.3% |
| Norma MRP | 63.9 gr | 82% | 35,911 psi | 56% | 2749 fps | 95% |
| Norma URP | <<locked>> | 80% | 42,612 psi | 67% | 2828 fps | 99.3% |
| Ramshot Grand | <<locked>> | 90% | 43,308 psi | 68% | 2913 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,481 psi | 65% | 2815 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 38,711 psi | 61% | 2782 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,301 psi | 84% | 2979 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,850 psi | 80% | 3031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,149 psi | 68% | 2858 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,611 psi | 65% | 2871 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,824 psi | 56% | 2782 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 50,270 psi | 79% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,687 psi | 72% | 2861 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 40,654 psi | 64% | 2799 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,514 psi | 73% | 2851 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,411 psi | 71% | 2828 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 43,627 psi | 68% | 2808 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,576 psi | 81% | 2976 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,647 psi | 79% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,396 psi | 70% | 2769 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,292 psi | 63% | 2792 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,328 psi | 79% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,067 psi | 78% | 2910 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 39,349 psi | 62% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,566 psi | 60% | 2720 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 48,066 psi | 75% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,121 psi | 69% | 2828 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 38,029 psi | 60% | 2700 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 43,555 psi | 68% | 2831 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,606 psi | 54% | 2674 fps | 98.1% |
| Vihtavuori N560 | 70.2 gr | 90% | 47,950 psi | 75% | 3009 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 47,703 psi | 75% | 2986 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,105 psi | 68% | 2789 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,208 psi | 71% | 2890 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,398 psi | 43% | 2575 fps | 97.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,524 psi | 64% | 2759 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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Sellier & Bellot FMJ. Winchester StaBALL HD delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,245 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Sellier & Bellot FMJ 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.