Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 150gr | Prvi Partizan HP BT 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% | 57,363 psi | 90% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,013 psi | 86% | 2953 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,941 psi | 88% | 3064 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 56,144 psi | 88% | 2913 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,738 psi | 87% | 3009 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 57,334 psi | 90% | 3071 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 2894 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,612 psi | 67% | 2851 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,028 psi | 88% | 3002 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,551 psi | 90% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,898 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,956 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,361 psi | 87% | 2995 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,232 psi | 90% | 3064 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,607 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,795 psi | 86% | 3068 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,101 psi | 88% | 3045 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 2966 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 57,232 psi | 90% | 3064 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 57,450 psi | 90% | 2953 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 2992 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 86% | 56,666 psi | 89% | 3009 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 55,796 psi | 87% | 2963 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 57,130 psi | 90% | 3005 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,101 psi | 88% | 2989 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,231 psi | 88% | 2933 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,649 psi | 83% | 3100 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 57,276 psi | 90% | 3048 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,521 psi | 87% | 2940 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,477 psi | 87% | 2923 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 55,303 psi | 87% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,665 psi | 86% | 2933 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 96% | 54,969 psi | 86% | 3041 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 55,999 psi | 88% | 2920 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,201 psi | 85% | 2917 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,766 psi | 86% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,623 psi | 89% | 2995 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 2769 fps | 96.6% |
| Norma MRP | <<locked>> | 94% | 56,942 psi | 89% | 3087 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,174 psi | 90% | 2992 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,840 psi | 88% | 3068 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 56,028 psi | 88% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,824 psi | 84% | 2995 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 59% | 1906 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,550 psi | 89% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,998 psi | 86% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,290 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3100 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 55,216 psi | 87% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,985 psi | 89% | 2976 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 54,824 psi | 86% | 2982 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 57,450 psi | 90% | 2953 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,999 psi | 88% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,201 psi | 85% | 2917 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,681 psi | 89% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,187 psi | 86% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,303 psi | 87% | 2874 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,418 psi | 85% | 2979 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 55,013 psi | 86% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,998 psi | 86% | 2910 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 57,580 psi | 90% | 2995 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,303 psi | 87% | 2956 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 56,246 psi | 88% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,317 psi | 87% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,795 psi | 86% | 2933 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 86% | 54,563 psi | 86% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,855 psi | 89% | 3012 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,811 psi | 89% | 3081 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3054 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,795 psi | 86% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,869 psi | 89% | 3009 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,840 psi | 88% | 3120 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,216 psi | 87% | 2949 fps | 99% |
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% | 33,373 psi | 52% | 2513 fps | 96.3% |
| Accurate 4350 | <<locked>> | 80% | 44,788 psi | 70% | 2779 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 48,573 psi | 76% | 2933 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 52,837 psi | 83% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,914 psi | 63% | 2703 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 88% | 43,743 psi | 69% | 2815 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 41,858 psi | 66% | 2766 fps | 95% |
| ADI AR 2225 | <<locked>> | 94% | 35,099 psi | 55% | 2661 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,408 psi | 63% | 2707 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,128 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,960 psi | 67% | 2789 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,603 psi | 78% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,030 psi | 63% | 2700 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,130 psi | 60% | 2694 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,981 psi | 50% | 2543 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,791 psi | 47% | 2497 fps | 95.1% |
| Alliant Reloder-26 | 62.9 gr | 80% | 34,896 psi | 55% | 2674 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 40,495 psi | 63% | 2749 fps | 95.9% |
| Bofors RP30 | <<locked>> | 94% | 40,480 psi | 63% | 2779 fps | 95.2% |
| Bofors RP5 | <<locked>> | 84% | 38,130 psi | 60% | 2694 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 47,616 psi | 75% | 2785 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 40,118 psi | 63% | 2730 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 46,412 psi | 73% | 2828 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 48,950 psi | 77% | 2844 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 46,746 psi | 73% | 2822 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,905 psi | 72% | 2805 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,524 psi | 64% | 2671 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,869 psi | 59% | 2769 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 45,977 psi | 72% | 2851 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 43% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,149 psi | 68% | 2713 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,979 psi | 77% | 2812 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 42,627 psi | 67% | 2723 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,411 psi | 71% | 2762 fps | 95.5% |
| IMR 7828 SSC | 66.1 gr | 90% | 44,875 psi | 70% | 2854 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 46,514 psi | 73% | 2762 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 44,947 psi | 70% | 2749 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 30,676 psi | 48% | 2441 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 43,004 psi | 67% | 2746 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 35,810 psi | 56% | 2707 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 34,795 psi | 55% | 2641 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 44,048 psi | 69% | 2769 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 41,713 psi | 65% | 2799 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 42,815 psi | 67% | 2759 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 37,188 psi | 58% | 2667 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 44% | 1706 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,678 psi | 83% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,686 psi | 70% | 2802 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,902 psi | 67% | 2812 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,751 psi | 54% | 2680 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 51,880 psi | 81% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,222 psi | 69% | 2746 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 39,247 psi | 62% | 2684 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,616 psi | 75% | 2785 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,514 psi | 73% | 2762 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,947 psi | 70% | 2749 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,069 psi | 83% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,851 psi | 81% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,542 psi | 71% | 2707 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,914 psi | 61% | 2677 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 51,547 psi | 81% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,020 psi | 71% | 2730 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,944 psi | 64% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,246 psi | 58% | 2608 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 49,487 psi | 78% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,426 psi | 71% | 2762 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,825 psi | 58% | 2592 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,875 psi | 70% | 2766 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,969 psi | 56% | 2625 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 46,311 psi | 73% | 2887 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 92% | 43,033 psi | 67% | 2805 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,570 psi | 70% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,601 psi | 73% | 2831 fps | 98.8% |
| Winchester StaBALL HD | 60.4 gr | 80% | 28,413 psi | 45% | 2546 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,030 psi | 61% | 2648 fps | 95.4% |
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 | 150gr | Prvi Partizan HP BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,120 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 150.0 gr projectile in 0.284" calls for a 1:11.5 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, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Weath. Mag. with the .284 | 150gr | Prvi Partizan HP 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.