Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 150gr | Barnes X BT bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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>> | 94% | 57,116 psi | 90% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,766 psi | 86% | 2933 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,288 psi | 85% | 3038 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 92% | 55,085 psi | 86% | 3035 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 90% | 54,549 psi | 85% | 2972 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 55,956 psi | 88% | 3031 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,517 psi | 79% | 2927 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2897 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,027 psi | 86% | 2972 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,810 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,898 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,433 psi | 85% | 2966 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,260 psi | 88% | 3035 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,464 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,041 psi | 85% | 3045 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 55,187 psi | 86% | 3018 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3009 fps | 98.3% |
| Bofors RP5 | <<locked>> | 94% | 56,260 psi | 88% | 3035 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 56,579 psi | 89% | 2923 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3018 fps | 99% |
| Hodgdon H414 | <<locked>> | 84% | 55,680 psi | 87% | 2976 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 54,592 psi | 86% | 2927 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 55,999 psi | 88% | 2972 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,795 psi | 86% | 2953 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,230 psi | 87% | 2904 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3136 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 55,796 psi | 87% | 3009 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,375 psi | 85% | 2904 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,566 psi | 90% | 2943 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 54,897 psi | 86% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,797 psi | 89% | 2953 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 57,551 psi | 90% | 3071 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 55,405 psi | 87% | 2894 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,058 psi | 89% | 2943 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 54,882 psi | 86% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,259 psi | 87% | 2959 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 41,524 psi | 65% | 2831 fps | 97.7% |
| Norma MRP | <<locked>> | 92% | 56,101 psi | 88% | 3058 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 56,246 psi | 88% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,520 psi | 85% | 3028 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 86% | 54,969 psi | 86% | 2963 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,014 psi | 89% | 3031 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,302 psi | 85% | 2949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,753 psi | 87% | 3028 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3136 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 3018 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 90% | 55,767 psi | 87% | 2940 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 57,479 psi | 90% | 3012 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 56,579 psi | 89% | 2923 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,405 psi | 87% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,058 psi | 89% | 2943 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,508 psi | 90% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,665 psi | 86% | 2848 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,029 psi | 89% | 3009 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 57,740 psi | 90% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,551 psi | 90% | 2936 fps | 97.9% |
| Somchem S365 | <<locked>> | 88% | 56,797 psi | 89% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,882 psi | 86% | 2933 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 55,245 psi | 87% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,404 psi | 85% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,522 psi | 90% | 2963 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,203 psi | 90% | 2959 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,739 psi | 89% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,782 psi | 87% | 3048 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 98% | 56,202 psi | 88% | 3035 fps | 98.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,533 psi | 82% | 3022 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,145 psi | 90% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,970 psi | 88% | 2979 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,085 psi | 86% | 3097 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,143 psi | 85% | 2920 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% | 36,898 psi | 58% | 2575 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 48,182 psi | 76% | 2822 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 41,771 psi | 65% | 2789 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 88% | 48,080 psi | 75% | 2910 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 39,798 psi | 62% | 2684 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 43,221 psi | 68% | 2789 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 44,454 psi | 70% | 2808 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 90% | 33,692 psi | 53% | 2598 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,219 psi | 63% | 2687 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,295 psi | 71% | 2815 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,301 psi | 82% | 2940 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,871 psi | 62% | 2680 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,348 psi | 60% | 2684 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,925 psi | 55% | 2602 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,676 psi | 48% | 2503 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,130 psi | 60% | 2740 fps | 99% |
| Bofors RP15 | <<locked>> | 84% | 38,232 psi | 60% | 2677 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 40,988 psi | 64% | 2776 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 38,348 psi | 60% | 2684 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 50,285 psi | 79% | 2815 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 40,190 psi | 63% | 2717 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 49,023 psi | 77% | 2861 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 51,416 psi | 81% | 2874 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 46,209 psi | 72% | 2795 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,194 psi | 71% | 2776 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,308 psi | 68% | 2707 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 38,247 psi | 60% | 2762 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 48,530 psi | 76% | 2884 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,411 psi | 71% | 2743 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,242 psi | 80% | 2835 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 45,716 psi | 72% | 2766 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,846 psi | 70% | 2733 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 44,527 psi | 70% | 2828 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,342 psi | 77% | 2792 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 47,703 psi | 75% | 2782 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 32,271 psi | 51% | 2461 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 45,513 psi | 71% | 2782 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 36,622 psi | 57% | 2713 fps | 95.9% |
| Norma MRP | 60.3 gr | 80% | 37,739 psi | 59% | 2697 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 46,717 psi | 73% | 2802 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 41,553 psi | 65% | 2776 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 45,426 psi | 71% | 2795 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 37,536 psi | 59% | 2661 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 45% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,732 psi | 75% | 2838 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,556 psi | 71% | 2851 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,215 psi | 55% | 2674 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 47,921 psi | 75% | 2949 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 82% | 43,743 psi | 69% | 2717 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 39,494 psi | 62% | 2671 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,285 psi | 79% | 2815 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,342 psi | 77% | 2792 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 47,703 psi | 75% | 2782 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,172 psi | 85% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,356 psi | 76% | 2740 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,146 psi | 61% | 2664 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 54,476 psi | 85% | 2871 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,686 psi | 70% | 2707 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 43,918 psi | 69% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,364 psi | 63% | 2657 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 52,054 psi | 82% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,993 psi | 75% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 37,260 psi | 58% | 2582 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 47,630 psi | 75% | 2802 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,247 psi | 62% | 2677 fps | 99.5% |
| Vihtavuori N560 | 64.8 gr | 86% | 45,890 psi | 72% | 2864 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 43,424 psi | 68% | 2795 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 98% | 49,153 psi | 77% | 2959 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,862 psi | 73% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,211 psi | 77% | 2864 fps | 99.2% |
| Winchester StaBALL HD | 59.6 gr | 80% | 31,401 psi | 49% | 2625 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,102 psi | 61% | 2631 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 73 powders for 7 mm Weath. Mag. loaded with the .284 | 150gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,136 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:10.5 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 150gr | Barnes X 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.