Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 145gr | Prvi Partizan SP bullet and 75 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% | 57,392 psi | 90% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,955 psi | 86% | 3002 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,840 psi | 88% | 3110 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 56,086 psi | 88% | 2963 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,709 psi | 87% | 3054 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 57,348 psi | 90% | 3117 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,993 psi | 75% | 2940 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,699 psi | 67% | 2894 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,970 psi | 88% | 3051 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,450 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,840 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,072 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,303 psi | 87% | 3041 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,203 psi | 90% | 3114 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,476 psi | 85% | 3028 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3087 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,984 psi | 86% | 3117 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,086 psi | 88% | 3091 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,908 psi | 78% | 3012 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 57,203 psi | 90% | 3114 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 57,450 psi | 90% | 3002 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 3035 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 86% | 56,739 psi | 89% | 3058 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 55,782 psi | 87% | 3012 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 57,188 psi | 90% | 3054 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,970 psi | 88% | 3031 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,115 psi | 88% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3150 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 57,319 psi | 90% | 3094 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1903 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,390 psi | 87% | 2986 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,288 psi | 87% | 2972 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 55,376 psi | 87% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,650 psi | 86% | 2979 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 96% | 54,984 psi | 86% | 3091 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 55,999 psi | 88% | 2972 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,682 psi | 90% | 3022 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,578 psi | 86% | 2979 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 56,376 psi | 88% | 3041 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 38,145 psi | 60% | 2805 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 56,942 psi | 89% | 3133 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 57,087 psi | 89% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,695 psi | 87% | 3110 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 55,782 psi | 87% | 3041 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,824 psi | 84% | 3041 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,739 psi | 59% | 1946 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,478 psi | 89% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,998 psi | 86% | 3025 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,130 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 3150 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 55,085 psi | 86% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,985 psi | 89% | 3025 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 54,810 psi | 86% | 3031 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 57,450 psi | 90% | 3002 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,999 psi | 88% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,682 psi | 90% | 3022 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,666 psi | 89% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,201 psi | 87% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,245 psi | 87% | 2920 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,375 psi | 85% | 3028 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 54,940 psi | 86% | 2946 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,071 psi | 86% | 2956 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 57,334 psi | 90% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,201 psi | 87% | 3002 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 56,057 psi | 88% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,259 psi | 87% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,839 psi | 86% | 2982 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 54,462 psi | 85% | 2982 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,826 psi | 89% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,768 psi | 89% | 3127 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3104 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,752 psi | 86% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,739 psi | 89% | 3058 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,941 psi | 88% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,216 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% | 33,315 psi | 52% | 2549 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 44,730 psi | 70% | 2825 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 48,414 psi | 76% | 2976 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 52,620 psi | 82% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,001 psi | 63% | 2746 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 88% | 43,613 psi | 68% | 2854 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 44,846 psi | 70% | 2874 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 35,186 psi | 55% | 2700 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,321 psi | 63% | 2749 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,896 psi | 84% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,728 psi | 67% | 2828 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,400 psi | 77% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,929 psi | 63% | 2740 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,756 psi | 64% | 2799 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,952 psi | 50% | 2582 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,836 psi | 50% | 2598 fps | 95.9% |
| Alliant Reloder-26 | 64.4 gr | 80% | 34,838 psi | 55% | 2717 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 40,422 psi | 63% | 2789 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 43,439 psi | 68% | 2884 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 40,756 psi | 64% | 2799 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 47,601 psi | 75% | 2831 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 43,062 psi | 67% | 2838 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 46,470 psi | 73% | 2874 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 49,081 psi | 77% | 2894 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 46,586 psi | 73% | 2861 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,759 psi | 72% | 2848 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,335 psi | 63% | 2710 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,855 psi | 59% | 2808 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 45,861 psi | 72% | 2894 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,120 psi | 68% | 2756 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,965 psi | 77% | 2858 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 42,583 psi | 67% | 2769 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,179 psi | 71% | 2802 fps | 95.2% |
| IMR 7828 SSC | 67.7 gr | 90% | 44,860 psi | 70% | 2894 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 46,543 psi | 73% | 2805 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 44,933 psi | 70% | 2795 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 32,692 psi | 51% | 2536 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,091 psi | 68% | 2792 fps | 96.2% |
| Norma 217 | <<locked>> | 98% | 35,795 psi | 56% | 2743 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 34,650 psi | 54% | 2677 fps | 95% |
| Norma URP | <<locked>> | 80% | 44,034 psi | 69% | 2815 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 44,701 psi | 70% | 2904 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 42,844 psi | 67% | 2805 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,101 psi | 58% | 2703 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,475 psi | 82% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,715 psi | 70% | 2844 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,859 psi | 67% | 2858 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,621 psi | 54% | 2710 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 51,808 psi | 81% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,092 psi | 69% | 2785 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 82% | 39,131 psi | 61% | 2723 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 47,601 psi | 75% | 2831 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,543 psi | 73% | 2805 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 44,933 psi | 70% | 2795 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,171 psi | 83% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,721 psi | 81% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,440 psi | 71% | 2749 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,783 psi | 61% | 2717 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 51,547 psi | 81% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,182 psi | 76% | 2835 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 40,901 psi | 64% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,304 psi | 58% | 2651 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 49,458 psi | 78% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,324 psi | 71% | 2808 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,854 psi | 58% | 2631 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,744 psi | 70% | 2812 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,810 psi | 56% | 2661 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 46,253 psi | 72% | 2930 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 94% | 46,079 psi | 72% | 2910 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,527 psi | 70% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,470 psi | 73% | 2874 fps | 98.6% |
| Winchester StaBALL HD | 61.9 gr | 80% | 28,442 psi | 45% | 2582 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,986 psi | 61% | 2687 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 75 powders for 7 mm Weath. Mag. loaded with the .284 | 145gr | Prvi Partizan SP. 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 75 of the 75 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 | Prvi Partizan SP 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.