Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Woodleigh PP SN 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 Accurate MAGPRO.
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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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>> | 96% | 55,753 psi | 87% | 3041 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 57,217 psi | 90% | 3084 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,290 psi | 90% | 3192 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 94% | 54,375 psi | 85% | 3127 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 54,955 psi | 86% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,230 psi | 85% | 3074 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 55,782 psi | 87% | 3133 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,423 psi | 65% | 2897 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,520 psi | 85% | 3071 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,188 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,346 psi | 85% | 3087 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,492 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,450 psi | 90% | 3123 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,535 psi | 87% | 3133 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,492 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 3104 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,232 psi | 90% | 3202 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,447 psi | 85% | 3110 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 57,334 psi | 90% | 3038 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,182 psi | 76% | 3025 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 55,535 psi | 87% | 3133 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 56,188 psi | 88% | 3028 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 3051 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 57,464 psi | 90% | 3058 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,303 psi | 87% | 3081 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 54,520 psi | 85% | 3035 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,666 psi | 87% | 3071 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,694 psi | 86% | 3054 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,650 psi | 86% | 3009 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,126 psi | 80% | 3159 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 55,724 psi | 87% | 3117 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,346 psi | 85% | 3012 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,653 psi | 90% | 3054 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,609 psi | 90% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,869 psi | 89% | 3058 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 57,159 psi | 90% | 3169 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 54,810 psi | 86% | 2999 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,391 psi | 88% | 3048 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2999 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 55,172 psi | 86% | 3064 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 55,390 psi | 87% | 3153 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,622 psi | 87% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,998 psi | 85% | 3127 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,578 psi | 86% | 3068 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,492 psi | 89% | 3127 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,058 psi | 89% | 3041 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,868 psi | 86% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,334 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,463 psi | 87% | 3133 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,735 psi | 81% | 3159 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 57,435 psi | 90% | 3035 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,608 psi | 87% | 3045 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 57,000 psi | 89% | 3114 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,188 psi | 88% | 3028 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,810 psi | 86% | 2999 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,391 psi | 88% | 3048 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,303 psi | 87% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,508 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,215 psi | 85% | 2949 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,536 psi | 89% | 3107 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 57,290 psi | 90% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,406 psi | 90% | 3038 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,956 psi | 88% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,551 psi | 90% | 3084 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,810 psi | 86% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,522 psi | 90% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,985 psi | 89% | 3058 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 56,811 psi | 89% | 3064 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,172 psi | 86% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,332 psi | 87% | 3146 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3120 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,145 psi | 90% | 3018 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,564 psi | 87% | 3084 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,664 psi | 84% | 3186 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,722 psi | 84% | 3018 fps | 98.4% |
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% | 32,314 psi | 51% | 2562 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 43,526 psi | 68% | 2844 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 46,369 psi | 73% | 2989 fps | 95.8% |
| Accurate MAGPRO | 73.4 gr | 92% | 50,618 psi | 79% | 3058 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 51,764 psi | 81% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,655 psi | 65% | 2828 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 45,585 psi | 71% | 2940 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 36,405 psi | 57% | 2766 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 41,930 psi | 66% | 2828 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,678 psi | 83% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,814 psi | 66% | 2854 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,225 psi | 76% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,510 psi | 65% | 2818 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,308 psi | 66% | 2877 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,024 psi | 49% | 2595 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,040 psi | 52% | 2671 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,692 psi | 53% | 2723 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 41,945 psi | 66% | 2864 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 53,708 psi | 84% | 2982 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,976 psi | 70% | 2959 fps | 95.9% |
| Bofors RP5 | <<locked>> | 88% | 42,308 psi | 66% | 2877 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,557 psi | 73% | 2854 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 44,773 psi | 70% | 2913 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 53,650 psi | 84% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,295 psi | 71% | 2894 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 47,935 psi | 75% | 2913 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 48,689 psi | 76% | 2946 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,834 psi | 75% | 2930 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,421 psi | 62% | 2736 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,218 psi | 61% | 2881 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,498 psi | 70% | 2910 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 43% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,105 psi | 66% | 2776 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,950 psi | 75% | 2884 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 41,466 psi | 65% | 2789 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,210 psi | 74% | 2884 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 46,615 psi | 73% | 2972 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,498 psi | 71% | 2828 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 43,874 psi | 69% | 2815 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 33,837 psi | 53% | 2602 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 41,974 psi | 66% | 2808 fps | 95.4% |
| Norma MRP | 64.2 gr | 82% | 36,143 psi | 57% | 2756 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,888 psi | 67% | 2835 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 43,540 psi | 68% | 2920 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,742 psi | 65% | 2822 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 38,899 psi | 61% | 2789 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,152 psi | 44% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,374 psi | 84% | 2982 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,184 psi | 80% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,453 psi | 68% | 2864 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,669 psi | 65% | 2874 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,187 psi | 57% | 2792 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,618 psi | 79% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,934 psi | 72% | 2864 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 40,727 psi | 64% | 2799 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,557 psi | 73% | 2854 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,498 psi | 71% | 2828 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 43,874 psi | 69% | 2815 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,880 psi | 81% | 2986 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,923 psi | 80% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,469 psi | 70% | 2772 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,364 psi | 63% | 2795 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 50,372 psi | 79% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,992 psi | 74% | 2854 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,653 psi | 62% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,798 psi | 61% | 2723 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 48,327 psi | 76% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,222 psi | 69% | 2831 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 38,290 psi | 60% | 2707 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,627 psi | 68% | 2831 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 34,708 psi | 54% | 2677 fps | 98.2% |
| Vihtavuori N560 | 70.5 gr | 90% | 48,196 psi | 76% | 3012 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 47,921 psi | 75% | 2989 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,337 psi | 68% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,484 psi | 71% | 2897 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,572 psi | 43% | 2582 fps | 97.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,727 psi | 64% | 2766 fps | 95.3% |
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 | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,202 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,202 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 1:13.0 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, Accurate MAGPRO rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Woodleigh PP SN 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.