Load Specifications
Load data in caliber 7 mm STW with .284 | 177gr | Brenneke TIG bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N570.
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% | 58,842 psi | 88% | 2746 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,885 psi | 87% | 2854 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 60,017 psi | 90% | 2831 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 58,581 psi | 88% | 2851 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 57,363 psi | 86% | 2828 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,841 psi | 87% | 2949 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 98% | 56,521 psi | 85% | 2851 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 60,147 psi | 90% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 59,509 psi | 89% | 2822 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 59,001 psi | 88% | 2844 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,043 psi | 86% | 2749 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,580 psi | 86% | 2822 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,957 psi | 87% | 2835 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 60,060 psi | 90% | 2930 fps | 99.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,405 psi | 83% | 2854 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,856 psi | 88% | 2812 fps | 99% |
| Bofors RP15 | <<locked>> | 90% | 58,421 psi | 88% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 57,508 psi | 86% | 2844 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 59,001 psi | 88% | 2844 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 59,016 psi | 88% | 2848 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,450 psi | 86% | 2785 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 60,278 psi | 90% | 2825 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 60,292 psi | 90% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,840 psi | 85% | 2907 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 57% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,189 psi | 87% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 59,292 psi | 89% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,682 psi | 86% | 2762 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 88% | 56,956 psi | 85% | 2831 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,930 psi | 90% | 2766 fps | 96.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,463 psi | 83% | 2831 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 56,971 psi | 85% | 2723 fps | 100% |
| Norma 204 | <<locked>> | 82% | 59,785 psi | 90% | 2808 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,681 psi | 85% | 2851 fps | 100% |
| Norma MRP | <<locked>> | 86% | 59,422 psi | 89% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 58,378 psi | 88% | 2854 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 59,828 psi | 90% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 56,927 psi | 85% | 2789 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 58% | 1808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,928 psi | 87% | 2900 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,985 psi | 85% | 2871 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 84% | 56,695 psi | 85% | 2749 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 59,248 psi | 89% | 2812 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,856 psi | 88% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,928 psi | 87% | 2740 fps | 99.8% |
| Somchem S365 | <<locked>> | 82% | 58,711 psi | 88% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 59,509 psi | 89% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 59,698 psi | 89% | 2769 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 58,798 psi | 88% | 2799 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 86% | 59,001 psi | 88% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 58,740 psi | 88% | 2864 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 59,770 psi | 90% | 2858 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 57,377 psi | 86% | 2871 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 58,740 psi | 88% | 2930 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,725 psi | 87% | 2838 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 59,625 psi | 89% | 2782 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% | 45,020 psi | 67% | 2546 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,920 psi | 70% | 2677 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 80% | 49,182 psi | 74% | 2671 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 44,469 psi | 67% | 2621 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 80% | 33,098 psi | 50% | 2372 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 92% | 43,134 psi | 65% | 2674 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 30,458 psi | 46% | 2346 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 56,347 psi | 84% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,921 psi | 73% | 2661 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,237 psi | 68% | 2621 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,918 psi | 66% | 2556 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,174 psi | 57% | 2510 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,053 psi | 75% | 2723 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 44,367 psi | 67% | 2671 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 94% | 44,338 psi | 66% | 2661 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,569 psi | 64% | 2533 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 42,003 psi | 63% | 2562 fps | 98.9% |
| Bofors RP30 | <<locked>> | 80% | 35,563 psi | 53% | 2444 fps | 96.6% |
| Bofors RP5 | <<locked>> | 80% | 45,237 psi | 68% | 2621 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 80% | 36,027 psi | 54% | 2448 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 80% | 46,920 psi | 70% | 2615 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,151 psi | 69% | 2602 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,011 psi | 79% | 2638 fps | 100% |
| Hodgdon Retumbo | 66.1 gr | 80% | 37,260 psi | 56% | 2552 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 43% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,708 psi | 82% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 55,477 psi | 83% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,732 psi | 72% | 2602 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 43,134 psi | 65% | 2602 fps | 98.4% |
| IMR 7977 Enduron | <<locked>> | 92% | 56,260 psi | 84% | 2713 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,374 psi | 52% | 2438 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 38,972 psi | 58% | 2431 fps | 99.7% |
| Norma 204 | <<locked>> | 80% | 55,898 psi | 84% | 2756 fps | 100% |
| Norma 217 | <<locked>> | 80% | 28,152 psi | 42% | 2290 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 48,051 psi | 72% | 2690 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,410 psi | 65% | 2615 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 80% | 56,014 psi | 84% | 2749 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 39,175 psi | 59% | 2497 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,225 psi | 44% | 1621 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,521 psi | 55% | 2530 fps | 99.4% |
| ReloadSwiss RS 80 | 73.1 gr | 82% | 36,187 psi | 54% | 2487 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 49,763 psi | 75% | 2641 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 48,602 psi | 73% | 2651 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,269 psi | 72% | 2648 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 50,734 psi | 76% | 2631 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 55,027 psi | 82% | 2694 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 49,153 psi | 74% | 2628 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,873 psi | 64% | 2513 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 48,182 psi | 72% | 2628 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 48,689 psi | 73% | 2631 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,630 psi | 71% | 2687 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 80% | 39,711 psi | 60% | 2516 fps | 97.2% |
| Vihtavuori N568 | <<locked>> | 82% | 37,449 psi | 56% | 2503 fps | 95% |
| Vihtavuori N570 | 75.5 gr | 88% | 44,208 psi | 66% | 2680 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,714 psi | 64% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,194 psi | 68% | 2562 fps | 99.4% |
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 56 powders for 7 mm STW loaded with the .284 | 177gr | Brenneke TIG. ADI AR 2218 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,949 fps. ADI AR 2218 gives the best case fill at 100 %, and 56 of the 56 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 177.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Alliant Reloder-50, Hodgdon TrailBoss 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. Hodgdon Retumbo, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for 7 mm STW with the .284 | 177gr | Brenneke TIG 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.