Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Prvi Partizan PSP BT bullet and 76 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% | 55,056 psi | 86% | 3028 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 56,695 psi | 89% | 3074 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 57,508 psi | 90% | 3182 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 54,418 psi | 85% | 2986 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,566 psi | 90% | 3130 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 55,158 psi | 86% | 3123 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,944 psi | 64% | 2887 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,637 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,305 psi | 90% | 3133 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,940 psi | 86% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,797 psi | 89% | 3110 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,882 psi | 86% | 3120 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,825 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 3094 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,463 psi | 88% | 3192 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3159 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 56,797 psi | 89% | 3028 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,558 psi | 75% | 3012 fps | 96.6% |
| Bofors RP5 | <<locked>> | 96% | 54,882 psi | 86% | 3120 fps | 98.7% |
| Bofors RP7 | <<locked>> | 86% | 55,724 psi | 87% | 3018 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,778 psi | 80% | 3035 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 56,971 psi | 89% | 3048 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,839 psi | 86% | 3071 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 57,595 psi | 90% | 3087 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 55,288 psi | 87% | 3064 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,085 psi | 85% | 3041 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,653 psi | 90% | 3051 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,546 psi | 79% | 3146 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 86% | 55,027 psi | 86% | 3104 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1929 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,305 psi | 90% | 3018 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,188 psi | 90% | 3054 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,174 psi | 90% | 3041 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 56,855 psi | 89% | 3061 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,492 psi | 89% | 3048 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 56,521 psi | 89% | 3156 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 54,302 psi | 85% | 2989 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,912 psi | 88% | 3035 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 2992 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 54,491 psi | 85% | 3051 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 54,708 psi | 86% | 3143 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 55,158 psi | 86% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,290 psi | 90% | 3179 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 57,725 psi | 90% | 3117 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3110 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 59% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,623 psi | 89% | 3031 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,244 psi | 85% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,637 psi | 89% | 3097 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,795 psi | 86% | 3123 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3146 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 56,898 psi | 89% | 3025 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,230 psi | 87% | 3038 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 94% | 56,333 psi | 88% | 3100 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 55,724 psi | 87% | 3018 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,302 psi | 85% | 2989 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 55,912 psi | 88% | 3035 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,824 psi | 86% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,000 psi | 89% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,203 psi | 90% | 2992 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,883 psi | 88% | 3094 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 56,753 psi | 89% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,855 psi | 89% | 3028 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 55,172 psi | 86% | 3061 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,956 psi | 89% | 3074 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 54,317 psi | 85% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,043 psi | 89% | 3051 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,376 psi | 88% | 3051 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,159 psi | 88% | 3054 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,694 psi | 86% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,679 psi | 86% | 3133 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3104 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,753 psi | 89% | 3009 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,839 psi | 86% | 3071 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3238 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,159 psi | 90% | 3068 fps | 98.8% |
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>> | 82% | 34,185 psi | 54% | 2615 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 42,989 psi | 67% | 2831 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 92% | 49,995 psi | 78% | 3045 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 51,271 psi | 80% | 2930 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,234 psi | 65% | 2815 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 45,005 psi | 71% | 2923 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 35,969 psi | 56% | 2753 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,373 psi | 82% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,321 psi | 65% | 2841 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,456 psi | 74% | 2969 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,089 psi | 64% | 2808 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,887 psi | 66% | 2864 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,618 psi | 48% | 2582 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,706 psi | 51% | 2661 fps | 95.8% |
| Alliant Reloder-26 | 63.9 gr | 80% | 33,286 psi | 52% | 2713 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 41,321 psi | 65% | 2851 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 53,171 psi | 83% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,367 psi | 70% | 2946 fps | 95.7% |
| Bofors RP5 | <<locked>> | 88% | 41,887 psi | 66% | 2864 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 46,093 psi | 72% | 2841 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 44,251 psi | 69% | 2900 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 53,142 psi | 83% | 2989 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,802 psi | 70% | 2884 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 47,485 psi | 74% | 2904 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 48,095 psi | 75% | 2933 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,239 psi | 74% | 2913 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,943 psi | 61% | 2723 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,725 psi | 61% | 2867 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 44,077 psi | 69% | 2900 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,911 psi | 84% | 2966 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,669 psi | 65% | 2766 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,485 psi | 74% | 2871 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 41,191 psi | 65% | 2782 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,644 psi | 73% | 2867 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 92% | 46,282 psi | 73% | 2963 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,020 psi | 71% | 2818 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 43,424 psi | 68% | 2802 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 33,402 psi | 52% | 2592 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 41,539 psi | 65% | 2799 fps | 95.2% |
| Norma MRP | 63.6 gr | 82% | 35,752 psi | 56% | 2746 fps | 95% |
| Norma URP | <<locked>> | 80% | 42,409 psi | 66% | 2822 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 46,093 psi | 72% | 2972 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,292 psi | 65% | 2812 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 38,377 psi | 60% | 2772 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,910 psi | 83% | 2972 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,357 psi | 79% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,960 psi | 67% | 2854 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,234 psi | 65% | 2864 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,348 psi | 60% | 2851 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,067 psi | 78% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,527 psi | 71% | 2854 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 84% | 40,277 psi | 63% | 2789 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 46,093 psi | 72% | 2841 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,020 psi | 71% | 2818 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 43,424 psi | 68% | 2802 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,372 psi | 81% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,415 psi | 79% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,222 psi | 69% | 2766 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,929 psi | 63% | 2782 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 49,864 psi | 78% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,705 psi | 78% | 2900 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 39,131 psi | 61% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,363 psi | 60% | 2713 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 47,819 psi | 75% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,729 psi | 69% | 2822 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 40,524 psi | 64% | 2753 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 43,163 psi | 68% | 2822 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,403 psi | 54% | 2667 fps | 98.1% |
| Vihtavuori N560 | 69.8 gr | 90% | 47,558 psi | 75% | 2999 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 96% | 47,326 psi | 74% | 2976 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,946 psi | 67% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,005 psi | 71% | 2887 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,224 psi | 43% | 2569 fps | 97.5% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,350 psi | 63% | 2759 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 76 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Prvi Partizan PSP BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,238 fps. ADI AR 2225 gives the best case fill at 100 %, and 76 of the 76 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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 | Prvi Partizan PSP BT 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.