Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 152gr | Hasler ARIETE bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, 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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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 3100 | <<locked>> | 98% | 57,406 psi | 90% | 2956 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 57,116 psi | 90% | 2864 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,274 psi | 87% | 2940 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,057 psi | 88% | 3048 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 57,246 psi | 90% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,304 psi | 88% | 2995 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 53,969 psi | 85% | 2992 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,798 psi | 62% | 2762 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,592 psi | 86% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,260 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,638 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,825 psi | 87% | 2982 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,305 psi | 90% | 3048 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,578 psi | 86% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 2963 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,752 psi | 86% | 3051 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3028 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 55,506 psi | 87% | 2894 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,166 psi | 72% | 2884 fps | 96.9% |
| Bofors RP5 | <<locked>> | 98% | 57,305 psi | 90% | 3048 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 54,839 psi | 86% | 2890 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 2910 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 82% | 55,680 psi | 87% | 2913 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,421 psi | 90% | 2999 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 56,550 psi | 89% | 2953 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 53,983 psi | 85% | 2930 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,681 psi | 89% | 2972 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,623 psi | 89% | 2920 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,342 psi | 77% | 3018 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 53,838 psi | 84% | 2969 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1831 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,565 psi | 89% | 2887 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,144 psi | 88% | 2927 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,507 psi | 89% | 2917 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 55,782 psi | 87% | 2933 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,332 psi | 87% | 2917 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 55,419 psi | 87% | 3028 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 56,739 psi | 89% | 2877 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,579 psi | 89% | 2910 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,708 psi | 86% | 2904 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 2858 fps | 99.8% |
| Norma 203B | <<locked>> | 82% | 57,711 psi | 90% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,203 psi | 90% | 2982 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 57,217 psi | 90% | 3071 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 57,580 psi | 90% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,144 psi | 88% | 3048 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 56,391 psi | 88% | 2982 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,230 psi | 85% | 2982 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,579 psi | 87% | 2900 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,348 psi | 90% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,274 psi | 87% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,722 psi | 84% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 3009 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 55,637 psi | 87% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,230 psi | 85% | 2907 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 55,172 psi | 86% | 2969 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 54,839 psi | 86% | 2890 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,579 psi | 89% | 2910 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,739 psi | 89% | 2877 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,708 psi | 86% | 2904 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,537 psi | 90% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,246 psi | 88% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,130 psi | 88% | 2864 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,708 psi | 86% | 2966 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 55,550 psi | 87% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,782 psi | 87% | 2900 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 57,609 psi | 90% | 2976 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,608 psi | 87% | 2940 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 56,840 psi | 89% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,927 psi | 88% | 2920 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,172 psi | 86% | 2920 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 57,464 psi | 90% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,911 psi | 86% | 2920 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,869 psi | 89% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,232 psi | 90% | 3064 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 2972 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,608 psi | 87% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,653 psi | 90% | 3002 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,506 psi | 87% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,738 psi | 87% | 2936 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% | 30,676 psi | 48% | 2431 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 53,722 psi | 84% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,814 psi | 66% | 2707 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 48,704 psi | 76% | 2917 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,372 psi | 79% | 2802 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,335 psi | 63% | 2694 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 44,019 psi | 69% | 2802 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 34,911 psi | 55% | 2638 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,401 psi | 81% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,379 psi | 63% | 2717 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,470 psi | 73% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,176 psi | 63% | 2687 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,942 psi | 59% | 2677 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,704 psi | 47% | 2467 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,647 psi | 50% | 2543 fps | 96.1% |
| Alliant Reloder-26 | 60.3 gr | 80% | 32,082 psi | 50% | 2589 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 40,277 psi | 63% | 2730 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,909 psi | 81% | 2838 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,161 psi | 63% | 2759 fps | 95% |
| Bofors RP5 | <<locked>> | 86% | 37,942 psi | 59% | 2677 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,121 psi | 71% | 2717 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 40,219 psi | 63% | 2713 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,127 psi | 82% | 2854 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,685 psi | 68% | 2756 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,586 psi | 73% | 2779 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 47,152 psi | 74% | 2808 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,253 psi | 72% | 2792 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,855 psi | 59% | 2602 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,565 psi | 59% | 2746 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 43,047 psi | 67% | 2776 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 43% | 1637 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,011 psi | 83% | 2835 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,857 psi | 64% | 2648 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,702 psi | 73% | 2749 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,943 psi | 63% | 2654 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,672 psi | 72% | 2746 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 45,150 psi | 71% | 2838 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 53,447 psi | 84% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,164 psi | 69% | 2697 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,409 psi | 66% | 2680 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 32,111 psi | 50% | 2470 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 54,114 psi | 85% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,553 psi | 64% | 2677 fps | 95.6% |
| Norma MRP | 60 gr | 82% | 34,606 psi | 54% | 2625 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,423 psi | 65% | 2700 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 41,843 psi | 66% | 2782 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,205 psi | 63% | 2687 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 37,130 psi | 58% | 2651 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,050 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,924 psi | 81% | 2841 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,385 psi | 77% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,829 psi | 66% | 2730 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,176 psi | 63% | 2740 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,432 psi | 54% | 2654 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 48,907 psi | 77% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,498 psi | 70% | 2730 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 39,218 psi | 61% | 2667 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,121 psi | 71% | 2717 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,164 psi | 69% | 2697 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 53,447 psi | 84% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,409 psi | 66% | 2680 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,328 psi | 79% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,530 psi | 78% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,149 psi | 68% | 2641 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,870 psi | 61% | 2661 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,994 psi | 77% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,498 psi | 71% | 2723 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,101 psi | 60% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,217 psi | 58% | 2592 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,876 psi | 73% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,844 psi | 67% | 2697 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,840 psi | 58% | 2575 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 53,983 psi | 85% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,177 psi | 66% | 2697 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,170 psi | 52% | 2543 fps | 98.2% |
| Vihtavuori N560 | 65.8 gr | 90% | 46,296 psi | 73% | 2871 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 45,759 psi | 72% | 2848 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,814 psi | 66% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,918 psi | 69% | 2762 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,121 psi | 41% | 2451 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,262 psi | 62% | 2638 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 88 powders for 7 mm Weath. Mag. loaded with the .284 | 152gr | Hasler ARIETE. Winchester StaBALL HD delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,100 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 152.0 gr projectile in 0.284" calls for a 1:9.0 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 152gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.