Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 139gr | Hasler ARIETE bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,913 psi | 89% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,607 psi | 86% | 2963 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,159 psi | 90% | 3068 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 57,566 psi | 90% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,332 psi | 87% | 3061 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,042 psi | 86% | 3159 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 98% | 56,028 psi | 88% | 3159 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 54,230 psi | 85% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,405 psi | 88% | 3110 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 54,259 psi | 85% | 3104 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,114 psi | 86% | 3009 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,129 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,318 psi | 88% | 3123 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,737 psi | 84% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,825 psi | 87% | 3097 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3163 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 3084 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,644 psi | 73% | 3005 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,375 psi | 85% | 3173 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,388 psi | 82% | 3077 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 55,883 psi | 88% | 3022 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3163 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 55,187 psi | 86% | 3012 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 56,159 psi | 88% | 3041 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,508 psi | 90% | 3120 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 56,942 psi | 89% | 3074 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 54,302 psi | 85% | 3045 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,014 psi | 89% | 3091 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,492 psi | 89% | 3041 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,745 psi | 72% | 3045 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 54,128 psi | 85% | 3094 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 57% | 1913 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,072 psi | 89% | 3018 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,072 psi | 88% | 3002 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,478 psi | 89% | 3048 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,927 psi | 89% | 3041 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 55,869 psi | 88% | 3054 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,565 psi | 89% | 3058 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,622 psi | 87% | 3031 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3140 fps | 97.4% |
| Lovex S062 | <<locked>> | 84% | 57,174 psi | 90% | 3009 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,058 psi | 89% | 3035 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,042 psi | 86% | 3025 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,326 psi | 74% | 2907 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 54,433 psi | 85% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,667 psi | 90% | 3107 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 56,942 psi | 89% | 3186 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,056 psi | 85% | 3045 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,492 psi | 87% | 3041 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,101 psi | 88% | 3159 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 56,608 psi | 89% | 3104 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,966 psi | 78% | 3022 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 58% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,115 psi | 88% | 3025 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,159 psi | 90% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,332 psi | 87% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,824 psi | 84% | 3114 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,905 psi | 72% | 3038 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,695 psi | 87% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,043 psi | 88% | 3018 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,534 psi | 85% | 3025 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 96% | 55,114 psi | 86% | 3081 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 55,187 psi | 86% | 3012 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,058 psi | 89% | 3035 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 57,174 psi | 90% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,042 psi | 86% | 3025 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,230 psi | 85% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,927 psi | 89% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,666 psi | 89% | 2986 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,650 psi | 86% | 3077 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 55,796 psi | 87% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,130 psi | 88% | 3012 fps | 96.7% |
| Somchem S365 | <<locked>> | 94% | 57,363 psi | 90% | 3100 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,535 psi | 87% | 3054 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 56,144 psi | 88% | 2927 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,376 psi | 88% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,392 psi | 90% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,188 psi | 88% | 3045 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3031 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,578 psi | 86% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,303 psi | 87% | 3048 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,478 psi | 89% | 3110 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,072 psi | 89% | 3176 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,883 psi | 88% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,128 psi | 85% | 3061 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,966 psi | 78% | 3150 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,014 psi | 88% | 3054 fps | 98.4% |
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 2495 | <<locked>> | 80% | 53,229 psi | 83% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,227 psi | 80% | 2907 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 35,099 psi | 55% | 2644 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 50,488 psi | 79% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,754 psi | 61% | 2753 fps | 98.5% |
| Accurate High Country | 67.7 gr | 92% | 47,543 psi | 75% | 3022 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 96% | 52,112 psi | 82% | 3091 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,877 psi | 75% | 2874 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 43,120 psi | 68% | 2861 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 47,152 psi | 74% | 2969 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,399 psi | 76% | 2897 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,663 psi | 81% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,884 psi | 59% | 2769 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,265 psi | 68% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,975 psi | 67% | 2854 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,439 psi | 68% | 2907 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,557 psi | 43% | 2497 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,518 psi | 53% | 2690 fps | 95.7% |
| Alliant Reloder-26 | 62.2 gr | 82% | 31,908 psi | 50% | 2684 fps | 95.8% |
| Bofors RP15 | <<locked>> | 94% | 42,786 psi | 67% | 2890 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 48,704 psi | 76% | 2907 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,439 psi | 68% | 2907 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,772 psi | 67% | 2776 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,052 psi | 77% | 2920 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,944 psi | 64% | 2805 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,801 psi | 69% | 2831 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 50,517 psi | 79% | 2979 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,530 psi | 78% | 2959 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,360 psi | 55% | 2654 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,045 psi | 63% | 2907 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,089 psi | 63% | 2818 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 43% | 1709 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,372 psi | 79% | 2910 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,620 psi | 82% | 2943 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,406 psi | 60% | 2697 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,193 psi | 69% | 2805 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 37,376 psi | 59% | 2707 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 53,011 psi | 83% | 2999 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,979 psi | 77% | 2913 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 48,211 psi | 76% | 3005 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,488 psi | 79% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,640 psi | 65% | 2753 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,813 psi | 62% | 2730 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 33,881 psi | 53% | 2615 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,010 psi | 80% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,743 psi | 69% | 2851 fps | 95.5% |
| Norma MRP | 63.3 gr | 86% | 36,985 psi | 58% | 2785 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,624 psi | 61% | 2749 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 51,779 psi | 81% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,399 psi | 76% | 3022 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,608 psi | 59% | 2736 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 39,914 psi | 63% | 2815 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 43% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,182 psi | 77% | 2907 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,035 psi | 72% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,740 psi | 61% | 2772 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,565 psi | 59% | 2782 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,726 psi | 62% | 2890 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 80% | 52,185 psi | 82% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,861 psi | 72% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,819 psi | 75% | 2904 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 41,974 psi | 66% | 2835 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,772 psi | 67% | 2776 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,640 psi | 65% | 2753 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 50,488 psi | 79% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,813 psi | 62% | 2730 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,398 psi | 74% | 2910 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,166 psi | 74% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,625 psi | 64% | 2694 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,597 psi | 65% | 2828 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,137 psi | 72% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,023 psi | 77% | 2890 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,114 psi | 55% | 2703 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,769 psi | 62% | 2756 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 52,794 psi | 83% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,866 psi | 83% | 2890 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,092 psi | 69% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,059 psi | 63% | 2749 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 39,305 psi | 62% | 2733 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 51,010 psi | 80% | 2884 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,392 psi | 62% | 2746 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 30,487 psi | 48% | 2575 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 94% | 49,632 psi | 78% | 3045 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,218 psi | 61% | 2717 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 41,147 psi | 64% | 2812 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,947 psi | 41% | 2526 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,018 psi | 66% | 2799 fps | 95.2% |
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 87 powders for 7 mm Weath. Mag. loaded with the .284 | 139gr | Hasler ARIETE. Norma MRP delivers the highest muzzle velocity at 3,186 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,186 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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, Accurate High Country, Norma MRP rank at the top here: for 7 mm Weath. Mag. with the .284 | 139gr | Hasler ARIETE 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.