Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 150gr | Swift Scirocco bullet and 76 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,782 psi | 87% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,101 psi | 89% | 2982 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,230 psi | 85% | 3031 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 55,085 psi | 86% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,157 psi | 85% | 2976 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 55,666 psi | 87% | 3038 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,470 psi | 73% | 2858 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,350 psi | 65% | 2815 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,188 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,288 psi | 85% | 2986 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,376 psi | 87% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,348 psi | 90% | 3022 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,419 psi | 87% | 3031 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,550 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 3005 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,130 psi | 90% | 3104 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,317 psi | 85% | 3012 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 57,319 psi | 90% | 2933 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 2933 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 55,419 psi | 87% | 3031 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,275 psi | 88% | 2930 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2956 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 82% | 57,261 psi | 90% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,201 psi | 87% | 2979 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,404 psi | 85% | 2936 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 55,709 psi | 87% | 2976 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,665 psi | 86% | 2959 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,723 psi | 86% | 2907 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,068 psi | 80% | 3064 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 55,651 psi | 87% | 3018 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 58% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,653 psi | 90% | 2966 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,360 psi | 85% | 2900 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 57,580 psi | 90% | 2976 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,942 psi | 89% | 2963 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 57,188 psi | 90% | 3074 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 54,839 psi | 86% | 2897 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,420 psi | 88% | 2946 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,939 psi | 83% | 2900 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,056 psi | 86% | 2966 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 55,114 psi | 86% | 3054 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,680 psi | 87% | 2966 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,809 psi | 84% | 3028 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 54,433 psi | 85% | 2969 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,289 psi | 88% | 3028 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1896 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,000 psi | 89% | 2940 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,824 psi | 86% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,072 psi | 89% | 3005 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,361 psi | 87% | 3031 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,459 psi | 81% | 3061 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,392 psi | 90% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,695 psi | 87% | 2949 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 56,840 psi | 89% | 3012 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,275 psi | 88% | 2930 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,839 psi | 86% | 2897 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,420 psi | 88% | 2946 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,390 psi | 87% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,406 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,215 psi | 85% | 2851 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,391 psi | 88% | 3009 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 57,159 psi | 90% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,392 psi | 90% | 2943 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 55,680 psi | 87% | 2966 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,566 psi | 90% | 2986 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 54,766 psi | 86% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,363 psi | 90% | 2956 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,942 psi | 89% | 2963 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 56,623 psi | 89% | 2963 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,172 psi | 86% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,042 psi | 86% | 3045 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3018 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,058 psi | 89% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,463 psi | 87% | 2982 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,508 psi | 90% | 2979 fps | 99.2% |
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% | 32,300 psi | 51% | 2484 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 43,482 psi | 68% | 2753 fps | 99.7% |
| Accurate MAGPRO | 68.2 gr | 90% | 46,934 psi | 74% | 2897 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 51,764 psi | 81% | 2841 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,030 psi | 61% | 2677 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 45,484 psi | 71% | 2848 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 43,511 psi | 68% | 2795 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 34,098 psi | 53% | 2625 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,794 psi | 83% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,858 psi | 66% | 2762 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,037 psi | 75% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,957 psi | 61% | 2674 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,581 psi | 62% | 2726 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,053 psi | 49% | 2516 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,980 psi | 49% | 2533 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,663 psi | 53% | 2644 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 39,247 psi | 62% | 2717 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 53,751 psi | 84% | 2881 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,061 psi | 66% | 2812 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 39,581 psi | 62% | 2726 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 46,644 psi | 73% | 2759 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 41,814 psi | 66% | 2766 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 53,737 psi | 84% | 2897 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,208 psi | 71% | 2802 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 47,979 psi | 75% | 2822 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 45,339 psi | 71% | 2789 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,718 psi | 75% | 2835 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,421 psi | 62% | 2648 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,247 psi | 62% | 2802 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 44,440 psi | 70% | 2818 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,032 psi | 66% | 2687 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,037 psi | 75% | 2789 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 41,597 psi | 65% | 2703 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,266 psi | 69% | 2733 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 43,685 psi | 68% | 2822 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 45,556 psi | 71% | 2736 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,787 psi | 69% | 2723 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 31,691 psi | 50% | 2467 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 41,916 psi | 66% | 2720 fps | 96% |
| Norma MRP | 61 gr | 82% | 36,100 psi | 57% | 2674 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 42,815 psi | 67% | 2743 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,381 psi | 68% | 2828 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 41,684 psi | 65% | 2733 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 35,998 psi | 56% | 2638 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 44% | 1696 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,345 psi | 84% | 2881 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,981 psi | 80% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,482 psi | 68% | 2772 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,785 psi | 65% | 2789 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,042 psi | 56% | 2713 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 50,517 psi | 79% | 2828 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,192 psi | 68% | 2717 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 38,116 psi | 60% | 2654 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 46,644 psi | 73% | 2759 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,556 psi | 71% | 2736 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,787 psi | 69% | 2723 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,822 psi | 81% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,763 psi | 80% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,672 psi | 70% | 2684 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,768 psi | 59% | 2648 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 50,444 psi | 79% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,949 psi | 74% | 2762 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 39,581 psi | 62% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,361 psi | 57% | 2585 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 48,240 psi | 76% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,193 psi | 69% | 2740 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,261 psi | 60% | 2621 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 43,729 psi | 69% | 2743 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,780 psi | 55% | 2595 fps | 98.6% |
| Vihtavuori N560 | 65.5 gr | 88% | 44,846 psi | 70% | 2854 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 44,483 psi | 70% | 2835 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,308 psi | 68% | 2703 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,397 psi | 71% | 2805 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,543 psi | 43% | 2513 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,640 psi | 64% | 2680 fps | 95.8% |
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 82 powders for 7 mm Weath. Mag. loaded with the .284 | 150gr | Swift Scirocco. Winchester StaBALL HD delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,143 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 1:9.5 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for 7 mm Weath. Mag. with the .284 | 150gr | Swift Scirocco they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, 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.