Load Specifications
Load data in caliber 7 mm STW with .284 | 170gr | Geco SOFTPOINT bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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>> | 88% | 57,943 psi | 87% | 2782 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,797 psi | 85% | 2884 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 86% | 58,914 psi | 88% | 2867 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,624 psi | 86% | 2884 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 56,391 psi | 85% | 2861 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,811 psi | 85% | 2976 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 59,234 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,205 psi | 89% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,450 psi | 88% | 2854 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,059 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,814 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 60,263 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,840 psi | 85% | 2871 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,653 psi | 88% | 2956 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,027 psi | 81% | 2877 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,870 psi | 87% | 2841 fps | 98.6% |
| Bofors RP15 | <<locked>> | 90% | 57,232 psi | 86% | 2864 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 60,075 psi | 90% | 2927 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 58,059 psi | 87% | 2877 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,798 psi | 87% | 2881 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,608 psi | 85% | 2818 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,350 psi | 89% | 2858 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,350 psi | 89% | 2772 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,712 psi | 90% | 2999 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 57% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,334 psi | 86% | 2785 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,131 psi | 87% | 2785 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,753 psi | 85% | 2795 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 60,031 psi | 90% | 2923 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,016 psi | 88% | 2795 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,360 psi | 81% | 2861 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,756 psi | 90% | 2815 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,567 psi | 89% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,798 psi | 88% | 2844 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,492 psi | 83% | 2881 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,131 psi | 87% | 2890 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,930 psi | 90% | 2828 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,217 psi | 86% | 2887 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,813 psi | 88% | 2838 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 60,133 psi | 90% | 2877 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,812 psi | 58% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,420 psi | 85% | 2930 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 60,089 psi | 90% | 2959 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 59,393 psi | 89% | 2838 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 58,436 psi | 88% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,756 psi | 90% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,944 psi | 90% | 2766 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,044 psi | 87% | 2848 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,101 psi | 86% | 2776 fps | 99.6% |
| Somchem S365 | <<locked>> | 82% | 57,667 psi | 86% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,668 psi | 88% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,537 psi | 88% | 2805 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,899 psi | 87% | 2831 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 86% | 57,928 psi | 87% | 2812 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,508 psi | 86% | 2894 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 58,581 psi | 88% | 2887 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 60,321 psi | 90% | 2959 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 57,566 psi | 86% | 2959 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,434 psi | 85% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,697 psi | 88% | 2818 fps | 100% |
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% | 44,208 psi | 66% | 2572 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,963 psi | 69% | 2700 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 80% | 48,356 psi | 72% | 2703 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 43,613 psi | 65% | 2648 fps | 98.1% |
| ADI AR 2217 | <<locked>> | 82% | 34,838 psi | 52% | 2454 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 94% | 45,571 psi | 68% | 2766 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 29,834 psi | 45% | 2362 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,492 psi | 83% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,124 psi | 72% | 2694 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,411 psi | 67% | 2654 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,120 psi | 65% | 2589 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,376 psi | 56% | 2536 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,936 psi | 73% | 2753 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,439 psi | 65% | 2690 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,470 psi | 70% | 2740 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,744 psi | 67% | 2618 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 41,249 psi | 62% | 2589 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 34,795 psi | 52% | 2467 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 44,411 psi | 67% | 2654 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 35,346 psi | 53% | 2470 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 46,122 psi | 69% | 2644 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,382 psi | 68% | 2631 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,185 psi | 78% | 2677 fps | 100% |
| Hodgdon Retumbo | 66.9 gr | 80% | 36,492 psi | 55% | 2575 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,340 psi | 42% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,954 psi | 81% | 2736 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,607 psi | 82% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,036 psi | 71% | 2635 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 42,279 psi | 63% | 2628 fps | 97.9% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,434 psi | 83% | 2743 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,692 psi | 51% | 2457 fps | 95.2% |
| Lovex S070 | <<locked>> | 80% | 55,999 psi | 84% | 2762 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,174 psi | 57% | 2457 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 54,984 psi | 82% | 2789 fps | 100% |
| Norma 217 | <<locked>> | 82% | 29,573 psi | 44% | 2365 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 47,108 psi | 71% | 2720 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 56,072 psi | 84% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,409 psi | 64% | 2638 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 80% | 55,071 psi | 83% | 2785 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,261 psi | 57% | 2523 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,196 psi | 44% | 1654 fps | 100% |
| ReloadSwiss RS 76 | 71.6 gr | 80% | 35,781 psi | 54% | 2549 fps | 98.9% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,159 psi | 57% | 2569 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 49,037 psi | 74% | 2674 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 47,819 psi | 72% | 2684 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 55,999 psi | 84% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,362 psi | 84% | 2717 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,471 psi | 71% | 2677 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 50,082 psi | 75% | 2664 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 54,070 psi | 81% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,341 psi | 72% | 2661 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,163 psi | 63% | 2539 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 50,546 psi | 76% | 2713 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 47,688 psi | 71% | 2664 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,702 psi | 70% | 2713 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 80% | 38,899 psi | 58% | 2539 fps | 96.5% |
| Vihtavuori N568 | <<locked>> | 84% | 39,378 psi | 59% | 2589 fps | 95.3% |
| Vihtavuori N570 | 78.1 gr | 90% | 46,369 psi | 70% | 2766 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,597 psi | 62% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,396 psi | 67% | 2592 fps | 99.1% |
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 60 powders for 7 mm STW loaded with the .284 | 170gr | Geco SOFTPOINT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,801 fps to 2,999 fps. ADI AR 2218 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 170gr | Geco SOFTPOINT 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.