Load Specifications
Load data in caliber 7 mm WSM with .284 | 155gr | Geco EXPRESS bullet and 82 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 MAGPRO 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 57,392 psi | 90% | 2848 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 56,927 psi | 89% | 2907 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 57,246 psi | 90% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,926 psi | 86% | 2890 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,332 psi | 87% | 2995 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 56,811 psi | 89% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,492 psi | 87% | 2940 fps | 99% |
| ADI AR 2213 | <<locked>> | 98% | 57,087 psi | 89% | 3002 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,508 psi | 62% | 2720 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,404 psi | 85% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,448 psi | 87% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,058 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,158 psi | 86% | 2930 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,637 psi | 89% | 2995 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,501 psi | 78% | 2910 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,824 psi | 84% | 3002 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2976 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 55,347 psi | 87% | 2848 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,527 psi | 71% | 2835 fps | 96.7% |
| Bofors RP5 | <<locked>> | 98% | 56,637 psi | 89% | 2995 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 54,476 psi | 85% | 2841 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,892 psi | 77% | 2854 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 55,492 psi | 87% | 2867 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,724 psi | 89% | 2943 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,188 psi | 88% | 2904 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 57,014 psi | 89% | 2936 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,912 psi | 88% | 2920 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,825 psi | 87% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2966 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 88% | 57,290 psi | 90% | 2986 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 58% | 1795 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,231 psi | 88% | 2841 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,695 psi | 87% | 2877 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,057 psi | 88% | 2867 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 55,158 psi | 86% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,694 psi | 86% | 2867 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 54,418 psi | 85% | 2972 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 56,550 psi | 89% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,318 psi | 88% | 2861 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,259 psi | 85% | 2854 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,691 psi | 79% | 2812 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,319 psi | 90% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,666 psi | 89% | 2933 fps | 99% |
| Norma MRP | <<locked>> | 96% | 56,275 psi | 88% | 3018 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 57,101 psi | 89% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,027 psi | 86% | 2992 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 55,883 psi | 88% | 2933 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2927 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1837 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,201 psi | 87% | 2851 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,217 psi | 88% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,752 psi | 86% | 2913 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,768 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,878 psi | 77% | 2959 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 55,492 psi | 87% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,116 psi | 90% | 2910 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 54,476 psi | 85% | 2917 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 54,476 psi | 85% | 2841 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,318 psi | 88% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,550 psi | 89% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,259 psi | 85% | 2854 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,869 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,927 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,767 psi | 87% | 2815 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,609 psi | 90% | 2969 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 55,274 psi | 87% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,274 psi | 87% | 2851 fps | 97.4% |
| Somchem S365 | <<locked>> | 92% | 56,927 psi | 89% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,143 psi | 86% | 2894 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 56,478 psi | 89% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,405 psi | 87% | 2867 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,549 psi | 85% | 2871 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 57,246 psi | 90% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,592 psi | 86% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,246 psi | 88% | 2943 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,275 psi | 88% | 3012 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2923 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,694 psi | 86% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,956 psi | 89% | 2949 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,071 psi | 86% | 2887 fps | 98.9% |
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% | 53,780 psi | 84% | 2792 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 30,864 psi | 48% | 2405 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 53,824 psi | 84% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,669 psi | 65% | 2664 fps | 99.5% |
| Accurate MAGPRO | 65.3 gr | 92% | 47,921 psi | 75% | 2867 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,198 psi | 79% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,030 psi | 63% | 2651 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 43,642 psi | 68% | 2756 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,751 psi | 54% | 2598 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,140 psi | 80% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,118 psi | 63% | 2674 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,905 psi | 72% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,885 psi | 63% | 2644 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,855 psi | 59% | 2641 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,776 psi | 47% | 2438 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,646 psi | 46% | 2448 fps | 95% |
| Alliant Reloder-26 | 57.4 gr | 80% | 31,995 psi | 50% | 2556 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 40,059 psi | 63% | 2690 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,721 psi | 81% | 2795 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,641 psi | 67% | 2779 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 37,855 psi | 59% | 2641 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,991 psi | 71% | 2674 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 42,670 psi | 67% | 2730 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,866 psi | 81% | 2808 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,468 psi | 68% | 2713 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,224 psi | 72% | 2733 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 46,717 psi | 73% | 2762 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,774 psi | 72% | 2746 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,826 psi | 59% | 2562 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,449 psi | 59% | 2703 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,453 psi | 67% | 2730 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 1604 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,837 psi | 83% | 2789 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,582 psi | 64% | 2605 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,485 psi | 73% | 2703 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 39,943 psi | 63% | 2618 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,513 psi | 71% | 2703 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 44,556 psi | 70% | 2789 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 53,156 psi | 83% | 2782 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,106 psi | 69% | 2654 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,424 psi | 66% | 2641 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 30,385 psi | 48% | 2392 fps | 95% |
| Norma 203B | <<locked>> | 80% | 53,664 psi | 84% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,364 psi | 63% | 2635 fps | 95.6% |
| Norma MRP | 57.2 gr | 82% | 34,563 psi | 54% | 2589 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,292 psi | 65% | 2661 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 41,394 psi | 65% | 2733 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 40,074 psi | 63% | 2651 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 36,782 psi | 58% | 2608 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,735 psi | 81% | 2795 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,718 psi | 76% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,568 psi | 65% | 2687 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,929 psi | 63% | 2697 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,301 psi | 54% | 2618 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,849 psi | 77% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,193 psi | 69% | 2687 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 39,131 psi | 61% | 2628 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,991 psi | 71% | 2674 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,106 psi | 69% | 2654 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 53,156 psi | 83% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,424 psi | 66% | 2641 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,009 psi | 78% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,284 psi | 77% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,975 psi | 67% | 2598 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,798 psi | 61% | 2625 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,834 psi | 77% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,223 psi | 71% | 2677 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,811 psi | 59% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,260 psi | 58% | 2559 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 46,760 psi | 73% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,525 psi | 67% | 2654 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,593 psi | 57% | 2536 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 53,679 psi | 84% | 2759 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,032 psi | 66% | 2657 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,243 psi | 52% | 2513 fps | 98.3% |
| Vihtavuori N560 | <<locked>> | 90% | 45,730 psi | 72% | 2822 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 45,411 psi | 71% | 2802 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,582 psi | 65% | 2621 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,671 psi | 68% | 2720 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,353 psi | 41% | 2428 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,044 psi | 61% | 2595 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 82 powders for 7 mm WSM loaded with the .284 | 155gr | Geco EXPRESS. Winchester StaBALL HD delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,048 fps. ADI AR 2225 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 155.0 gr projectile in 0.284" calls for a 1:11.0 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. Alliant Reloder-26, Accurate MAGPRO, Norma MRP rank at the top here: for 7 mm WSM with the .284 | 155gr | Geco EXPRESS 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.