Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 145gr | 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 Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2700 | <<locked>> | 82% | 56,405 psi | 88% | 2940 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 55,637 psi | 87% | 2992 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,680 psi | 87% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,348 psi | 90% | 3035 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,246 psi | 90% | 3143 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 96% | 54,433 psi | 85% | 3081 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 55,753 psi | 87% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,824 psi | 86% | 3031 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 56,144 psi | 88% | 3087 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,537 psi | 60% | 2785 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,085 psi | 86% | 3028 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,782 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,014 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,781 psi | 86% | 3041 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,057 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,360 psi | 85% | 3018 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,521 psi | 87% | 3081 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,675 psi | 76% | 2995 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,188 psi | 90% | 3156 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3061 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 57,711 psi | 90% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,521 psi | 87% | 3081 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 57,029 psi | 89% | 2986 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,196 psi | 76% | 2936 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 54,259 psi | 85% | 2956 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,709 psi | 87% | 3035 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,332 psi | 87% | 2995 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 56,463 psi | 88% | 3031 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,114 psi | 86% | 3009 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,911 psi | 86% | 2959 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,718 psi | 75% | 3041 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,449 psi | 88% | 3074 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 1877 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,303 psi | 87% | 2936 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,551 psi | 90% | 2972 fps | 99.7% |
| IMR 4350 | <<locked>> | 90% | 54,868 psi | 86% | 2969 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,187 psi | 86% | 2959 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,114 psi | 85% | 2972 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,566 psi | 90% | 3015 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3123 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 55,419 psi | 87% | 2927 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,405 psi | 87% | 2953 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,710 psi | 89% | 2999 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,458 psi | 78% | 2894 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,304 psi | 88% | 2982 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,709 psi | 87% | 3022 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 55,347 psi | 87% | 3107 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 55,898 psi | 88% | 3018 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,508 psi | 90% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,288 psi | 85% | 3081 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 54,882 psi | 86% | 3022 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,243 psi | 82% | 3009 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 59% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,201 psi | 85% | 2940 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,434 psi | 87% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,638 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,072 psi | 88% | 3094 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,993 psi | 75% | 3038 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 57,232 psi | 90% | 2936 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,157 psi | 85% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,217 psi | 88% | 2999 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 96% | 57,392 psi | 90% | 3064 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 88% | 57,029 psi | 89% | 2986 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,405 psi | 87% | 2953 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,419 psi | 87% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,710 psi | 89% | 2999 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,956 psi | 88% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,056 psi | 86% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,940 psi | 86% | 2907 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,927 psi | 89% | 3061 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 54,186 psi | 85% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,346 psi | 85% | 2933 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 55,941 psi | 88% | 3022 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,114 psi | 85% | 2979 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 55,376 psi | 87% | 2904 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,346 psi | 85% | 2959 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3012 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 56,144 psi | 88% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,116 psi | 90% | 3018 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,926 psi | 86% | 3028 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,390 psi | 87% | 3097 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,879 psi | 80% | 2999 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,128 psi | 85% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,970 psi | 88% | 3038 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,128 psi | 85% | 2972 fps | 98.5% |
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 2700 | <<locked>> | 80% | 52,663 psi | 83% | 2881 fps | 98.8% |
| Accurate 3100 | <<locked>> | 84% | 34,113 psi | 53% | 2575 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,156 psi | 82% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,495 psi | 63% | 2740 fps | 99.1% |
| Accurate High Country | <<locked>> | 90% | 46,253 psi | 72% | 2943 fps | 95.9% |
| Accurate MAGPRO | 70.7 gr | 94% | 50,618 psi | 79% | 3015 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 49,240 psi | 77% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,901 psi | 66% | 2785 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 45,832 psi | 72% | 2897 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 36,100 psi | 57% | 2720 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,090 psi | 66% | 2785 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,908 psi | 78% | 2867 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,490 psi | 84% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,247 psi | 62% | 2749 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,976 psi | 70% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,655 psi | 65% | 2776 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,407 psi | 62% | 2769 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,631 psi | 45% | 2487 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,721 psi | 51% | 2625 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,908 psi | 48% | 2605 fps | 95.9% |
| Bofors RP15 | <<locked>> | 92% | 41,597 psi | 65% | 2815 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,546 psi | 79% | 2884 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 39,407 psi | 62% | 2769 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,077 psi | 69% | 2753 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 44,976 psi | 70% | 2871 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 80% | 50,807 psi | 80% | 2897 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,424 psi | 66% | 2789 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 45,397 psi | 71% | 2815 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 49,066 psi | 77% | 2904 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,153 psi | 75% | 2887 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,724 psi | 58% | 2635 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,914 psi | 61% | 2831 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,597 psi | 65% | 2805 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 43% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,808 psi | 81% | 2881 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,027 psi | 85% | 2913 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 39,827 psi | 62% | 2680 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,658 psi | 72% | 2785 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 38,783 psi | 61% | 2687 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,572 psi | 75% | 2841 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 46,934 psi | 74% | 2930 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 51,982 psi | 81% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,917 psi | 67% | 2730 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,147 psi | 64% | 2713 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 33,083 psi | 52% | 2549 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,794 psi | 83% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,308 psi | 66% | 2772 fps | 95.6% |
| Norma MRP | 62 gr | 84% | 35,969 psi | 56% | 2713 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,030 psi | 63% | 2730 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 53,693 psi | 84% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 43,497 psi | 68% | 2871 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,015 psi | 61% | 2720 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 38,754 psi | 61% | 2740 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 44% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,633 psi | 79% | 2881 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,790 psi | 75% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,495 psi | 63% | 2759 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,131 psi | 61% | 2772 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,810 psi | 56% | 2743 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 53,679 psi | 84% | 2884 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,413 psi | 74% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,238 psi | 72% | 2822 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 40,712 psi | 64% | 2756 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,077 psi | 69% | 2753 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,917 psi | 67% | 2730 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 51,982 psi | 81% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,147 psi | 64% | 2713 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,979 psi | 77% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,515 psi | 76% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,076 psi | 66% | 2674 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,350 psi | 63% | 2753 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,601 psi | 75% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,471 psi | 74% | 2815 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 36,840 psi | 58% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,580 psi | 60% | 2680 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 45,484 psi | 71% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,669 psi | 65% | 2733 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 38,159 psi | 60% | 2661 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,736 psi | 83% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,002 psi | 64% | 2730 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,024 psi | 50% | 2569 fps | 97.4% |
| Vihtavuori N560 | 67.9 gr | 92% | 48,225 psi | 76% | 2966 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 47,529 psi | 74% | 2936 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,785 psi | 64% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,656 psi | 67% | 2792 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,251 psi | 40% | 2457 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,683 psi | 64% | 2723 fps | 95.3% |
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 | 145gr | Hasler ARIETE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,156 fps. ADI AR 2225 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 145.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for 7 mm Weath. Mag. with the .284 | 145gr | 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.