Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 150gr | Berger Classic Hybrid Hunter bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, 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>> | 94% | 54,012 psi | 85% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,390 psi | 87% | 2963 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 55,506 psi | 87% | 3074 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 94% | 56,449 psi | 88% | 3077 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 56,478 psi | 89% | 2923 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,260 psi | 88% | 3018 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 53,983 psi | 85% | 3018 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,254 psi | 76% | 2907 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,989 psi | 67% | 2858 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,246 psi | 88% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,609 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,622 psi | 87% | 3002 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,740 psi | 90% | 3077 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,143 psi | 86% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3048 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,303 psi | 87% | 3077 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,608 psi | 89% | 3054 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,227 psi | 79% | 2979 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 57,740 psi | 90% | 3077 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 54,360 psi | 85% | 2907 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3002 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 57,188 psi | 90% | 3018 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,115 psi | 88% | 2972 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 57,638 psi | 90% | 3015 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,623 psi | 89% | 2999 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,536 psi | 89% | 2940 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,127 psi | 83% | 3110 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 53,751 psi | 84% | 2992 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,999 psi | 58% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,767 psi | 87% | 2946 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,753 psi | 87% | 2933 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 55,840 psi | 88% | 2956 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,143 psi | 86% | 2943 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 55,477 psi | 87% | 3054 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 56,275 psi | 88% | 2930 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,476 psi | 85% | 2923 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,869 psi | 89% | 3005 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 38,566 psi | 60% | 2779 fps | 96.8% |
| Norma MRP | <<locked>> | 94% | 57,508 psi | 90% | 3097 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 57,493 psi | 90% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,086 psi | 88% | 3074 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 56,333 psi | 88% | 3002 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,592 psi | 86% | 3009 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 59% | 1913 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,971 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,535 psi | 87% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,551 psi | 90% | 3071 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,838 psi | 84% | 3110 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,849 psi | 77% | 2982 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 82% | 55,564 psi | 87% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,450 psi | 90% | 2986 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 55,143 psi | 86% | 2992 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 54,360 psi | 85% | 2907 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,275 psi | 88% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,476 psi | 85% | 2923 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,985 psi | 89% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,506 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,782 psi | 87% | 2884 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,708 psi | 86% | 2989 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 55,361 psi | 87% | 2907 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,463 psi | 87% | 2920 fps | 97.7% |
| Somchem S365 | <<locked>> | 88% | 54,070 psi | 85% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,782 psi | 87% | 2969 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 56,550 psi | 89% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,608 psi | 87% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,274 psi | 87% | 2946 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 54,868 psi | 86% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,450 psi | 90% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,334 psi | 90% | 3091 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 3064 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,085 psi | 86% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,188 psi | 90% | 3018 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,478 psi | 89% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,666 psi | 87% | 2963 fps | 99.1% |
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% | 33,663 psi | 53% | 2523 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 45,136 psi | 71% | 2789 fps | 99.9% |
| Accurate High Country | 64.5 gr | 84% | 41,843 psi | 66% | 2808 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 90% | 48,834 psi | 77% | 2940 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 53,142 psi | 83% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,350 psi | 63% | 2713 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 44,005 psi | 69% | 2825 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 96% | 42,221 psi | 66% | 2776 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 94% | 35,447 psi | 56% | 2671 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,265 psi | 68% | 2799 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,995 psi | 78% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,666 psi | 59% | 2648 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,377 psi | 60% | 2703 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,227 psi | 51% | 2552 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,139 psi | 47% | 2510 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,172 psi | 55% | 2687 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 38,087 psi | 60% | 2697 fps | 95.1% |
| Bofors RP30 | <<locked>> | 94% | 40,915 psi | 64% | 2789 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 38,377 psi | 60% | 2703 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 47,892 psi | 75% | 2795 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 40,509 psi | 63% | 2743 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 46,717 psi | 73% | 2835 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 49,255 psi | 77% | 2854 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 47,036 psi | 74% | 2831 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,166 psi | 72% | 2815 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,828 psi | 64% | 2680 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,072 psi | 60% | 2776 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 46,267 psi | 73% | 2861 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 43% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,439 psi | 68% | 2723 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,284 psi | 77% | 2822 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 42,960 psi | 67% | 2733 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,672 psi | 72% | 2772 fps | 95.7% |
| IMR 7828 SSC | 65.1 gr | 88% | 42,308 psi | 66% | 2799 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,818 psi | 73% | 2769 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 45,252 psi | 71% | 2759 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 30,951 psi | 49% | 2451 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 43,308 psi | 68% | 2756 fps | 96.6% |
| Norma 217 | <<locked>> | 98% | 36,172 psi | 57% | 2720 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 35,099 psi | 55% | 2651 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 44,382 psi | 70% | 2779 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 42,163 psi | 66% | 2808 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 43,091 psi | 68% | 2769 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 37,608 psi | 59% | 2680 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1709 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,084 psi | 83% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,049 psi | 71% | 2808 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,163 psi | 68% | 2822 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,940 psi | 55% | 2687 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 45,252 psi | 71% | 2913 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 52,243 psi | 82% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,640 psi | 65% | 2694 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 37,072 psi | 58% | 2635 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 47,892 psi | 75% | 2795 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,818 psi | 73% | 2769 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 45,252 psi | 71% | 2759 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,403 psi | 84% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,170 psi | 82% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,818 psi | 72% | 2717 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,204 psi | 61% | 2687 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 51,909 psi | 81% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 45,455 psi | 71% | 2743 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 41,307 psi | 65% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,521 psi | 59% | 2618 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,792 psi | 78% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,759 psi | 72% | 2772 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 37,260 psi | 58% | 2602 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 45,179 psi | 71% | 2776 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 36,303 psi | 57% | 2635 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 43,526 psi | 68% | 2831 fps | 95% |
| Vihtavuori N565 | <<locked>> | 92% | 43,497 psi | 68% | 2815 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,846 psi | 70% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,905 psi | 74% | 2841 fps | 98.9% |
| Winchester StaBALL HD | 60.8 gr | 80% | 28,631 psi | 45% | 2556 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,450 psi | 62% | 2657 fps | 95.6% |
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 | Berger Classic Hybrid Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,127 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 1:11.0 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Weath. Mag. with the .284 | 150gr | Berger Classic Hybrid Hunter 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.