Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 158gr | Sellier & Bellot XRG bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,708 psi | 86% | 2864 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,202 psi | 88% | 2897 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,304 psi | 88% | 3015 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 94% | 57,217 psi | 90% | 3018 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 82% | 57,087 psi | 89% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,826 psi | 89% | 2953 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 54,694 psi | 86% | 2959 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 2854 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,598 psi | 68% | 2808 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,116 psi | 90% | 2953 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,072 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,375 psi | 85% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,405 psi | 88% | 2943 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,737 psi | 86% | 2953 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,927 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,144 psi | 88% | 3015 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,434 psi | 88% | 2913 fps | 96.2% |
| Bofors RP15 | <<locked>> | 98% | 57,217 psi | 90% | 2992 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 2923 fps | 98.4% |
| Bofors RP5 | <<locked>> | 94% | 54,737 psi | 86% | 2953 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 54,868 psi | 86% | 2841 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 2940 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 84% | 54,114 psi | 85% | 2894 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 56,797 psi | 89% | 2907 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 54,476 psi | 85% | 2894 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,334 psi | 90% | 2940 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,406 psi | 90% | 2874 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,925 psi | 85% | 3054 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 54,433 psi | 85% | 2930 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1814 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,550 psi | 89% | 2884 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,289 psi | 88% | 2864 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 56,434 psi | 88% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,579 psi | 87% | 2877 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 56,289 psi | 88% | 2995 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 57,159 psi | 90% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,158 psi | 86% | 2861 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,624 psi | 90% | 2940 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 39,146 psi | 61% | 2730 fps | 97.5% |
| Norma MRP | <<locked>> | 92% | 54,505 psi | 85% | 2976 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 54,534 psi | 85% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,145 psi | 90% | 3018 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 88% | 57,072 psi | 89% | 2940 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,288 psi | 87% | 2946 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,057 psi | 88% | 2920 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,360 psi | 85% | 2946 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3054 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2930 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 82% | 56,362 psi | 88% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,679 psi | 86% | 2871 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 55,927 psi | 88% | 2933 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 54,868 psi | 86% | 2841 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,159 psi | 90% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,158 psi | 86% | 2861 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,682 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,014 psi | 88% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,275 psi | 88% | 2818 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,477 psi | 87% | 2927 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 55,854 psi | 88% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,086 psi | 88% | 2861 fps | 98.1% |
| Somchem S365 | <<locked>> | 88% | 55,013 psi | 86% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,420 psi | 88% | 2904 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 57,159 psi | 90% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,405 psi | 88% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,057 psi | 88% | 2887 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 55,448 psi | 87% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,520 psi | 85% | 2900 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,375 psi | 85% | 2969 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 98% | 54,056 psi | 85% | 2946 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 2936 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,854 psi | 88% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,346 psi | 85% | 2900 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,609 psi | 90% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,463 psi | 88% | 2900 fps | 99.4% |
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 3100 | <<locked>> | 80% | 34,229 psi | 54% | 2477 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 45,861 psi | 72% | 2730 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 39,726 psi | 62% | 2697 fps | 95% |
| Accurate MAGPRO | <<locked>> | 88% | 46,267 psi | 73% | 2822 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 53,679 psi | 84% | 2805 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,232 psi | 60% | 2602 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 41,771 psi | 65% | 2710 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 40,103 psi | 63% | 2667 fps | 95% |
| ADI AR 2225 | <<locked>> | 92% | 33,779 psi | 53% | 2566 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,595 psi | 60% | 2605 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,874 psi | 69% | 2736 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,691 psi | 79% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,247 psi | 60% | 2598 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,521 psi | 57% | 2595 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,750 psi | 51% | 2500 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,631 psi | 45% | 2405 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,853 psi | 56% | 2638 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 53,084 psi | 83% | 2858 fps | 95.3% |
| Bofors RP15 | <<locked>> | 86% | 38,696 psi | 61% | 2644 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 38,914 psi | 61% | 2680 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 36,521 psi | 57% | 2595 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 48,457 psi | 76% | 2733 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 38,406 psi | 60% | 2631 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 47,471 psi | 74% | 2779 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 49,937 psi | 78% | 2792 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 44,643 psi | 70% | 2717 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,801 psi | 69% | 2700 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,379 psi | 65% | 2621 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 36,303 psi | 57% | 2667 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 46,905 psi | 74% | 2802 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,005 psi | 69% | 2667 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,835 psi | 78% | 2759 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 43,584 psi | 68% | 2677 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 43,279 psi | 68% | 2654 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 88% | 42,888 psi | 67% | 2746 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 47,340 psi | 74% | 2707 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 45,818 psi | 72% | 2700 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 29,515 psi | 46% | 2352 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 44,034 psi | 69% | 2703 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 34,330 psi | 54% | 2608 fps | 95.6% |
| Norma MRP | 59.9 gr | 80% | 35,607 psi | 56% | 2602 fps | 96.4% |
| Norma URP | <<locked>> | 80% | 45,005 psi | 71% | 2720 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 39,697 psi | 62% | 2687 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 43,816 psi | 69% | 2713 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 35,476 psi | 56% | 2569 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,658 psi | 72% | 2749 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,845 psi | 69% | 2766 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,098 psi | 52% | 2575 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 46,006 psi | 72% | 2864 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 52,910 psi | 83% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 42,250 psi | 66% | 2641 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 37,623 psi | 59% | 2582 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 48,457 psi | 76% | 2733 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,340 psi | 74% | 2707 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 45,818 psi | 72% | 2700 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,244 psi | 85% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,852 psi | 83% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,369 psi | 73% | 2657 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,318 psi | 58% | 2579 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 52,460 psi | 82% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,105 psi | 68% | 2631 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 41,989 psi | 66% | 2674 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,116 psi | 60% | 2566 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,401 psi | 79% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,369 psi | 73% | 2713 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,244 psi | 55% | 2493 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,629 psi | 72% | 2713 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 36,869 psi | 58% | 2582 fps | 99.4% |
| Vihtavuori N560 | 64.4 gr | 86% | 44,179 psi | 69% | 2779 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 41,205 psi | 65% | 2703 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 98% | 47,152 psi | 74% | 2871 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,513 psi | 71% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,471 psi | 74% | 2779 fps | 99.3% |
| Winchester StaBALL HD | 59.3 gr | 80% | 29,196 psi | 46% | 2516 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,318 psi | 58% | 2549 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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 158gr | Sellier & Bellot XRG. Winchester StaBALL HD delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,064 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 158.0 gr projectile in 0.284" calls for a 1:10.5 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 158gr | Sellier & Bellot XRG 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.