Load Specifications
Load data in caliber 7 mm STW with .284 | 171gr | Barnes Match Burner BT bullet and 67 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>> | 90% | 59,364 psi | 89% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 59,727 psi | 90% | 2808 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 58,523 psi | 88% | 2904 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 56,971 psi | 85% | 2825 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 59,117 psi | 89% | 2894 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 57,711 psi | 87% | 2871 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,969 psi | 81% | 2917 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,086 psi | 84% | 2887 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,014 psi | 85% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 60,104 psi | 90% | 2867 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 59,466 psi | 89% | 2890 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,493 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,566 psi | 86% | 2864 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 58,363 psi | 87% | 2884 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 59,930 psi | 90% | 2969 fps | 98.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 50,894 psi | 76% | 2818 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 59,538 psi | 89% | 2854 fps | 98.7% |
| Bofors RP15 | <<locked>> | 92% | 58,610 psi | 88% | 2874 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 57,348 psi | 86% | 2881 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 59,466 psi | 89% | 2890 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 59,393 psi | 89% | 2890 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 58,102 psi | 87% | 2828 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,159 psi | 86% | 2815 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,072 psi | 86% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,608 psi | 85% | 2949 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,695 psi | 56% | 1781 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 59,234 psi | 89% | 2799 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 59,973 psi | 90% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,407 psi | 88% | 2805 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 57,319 psi | 86% | 2877 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,576 psi | 77% | 2812 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 59,248 psi | 89% | 2772 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,696 psi | 86% | 2772 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,174 psi | 86% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,840 psi | 85% | 2805 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 52,533 psi | 79% | 2835 fps | 100% |
| Norma MRP | <<locked>> | 88% | 59,799 psi | 90% | 2907 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,711 psi | 87% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 58,769 psi | 88% | 2900 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 56,840 psi | 85% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,203 psi | 86% | 2831 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,609 psi | 58% | 1824 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 60,147 psi | 90% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 58,682 psi | 88% | 2861 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,537 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,884 psi | 85% | 2907 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 57,508 psi | 86% | 2795 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 60,002 psi | 90% | 2861 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 59,248 psi | 89% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,696 psi | 86% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,247 psi | 87% | 2730 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 59,582 psi | 89% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 58,958 psi | 88% | 2785 fps | 99.7% |
| Somchem S365 | <<locked>> | 84% | 59,408 psi | 89% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 60,365 psi | 90% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 59,219 psi | 89% | 2776 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 60,191 psi | 90% | 2815 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 59,248 psi | 89% | 2838 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 82% | 58,639 psi | 88% | 2785 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 59,524 psi | 89% | 2825 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 59,146 psi | 89% | 2910 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 94% | 60,017 psi | 90% | 2900 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 57,566 psi | 86% | 2910 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 58,653 psi | 88% | 2969 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 58,798 psi | 88% | 2730 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,537 psi | 86% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,289 psi | 84% | 2772 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% | 42,453 psi | 64% | 2533 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 55,825 psi | 84% | 2756 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,092 psi | 66% | 2657 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 80% | 46,543 psi | 70% | 2657 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 41,713 psi | 63% | 2602 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 84% | 35,665 psi | 53% | 2467 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 96% | 46,601 psi | 70% | 2776 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 28,558 psi | 43% | 2320 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,534 psi | 80% | 2762 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,354 psi | 69% | 2651 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,424 psi | 64% | 2608 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,350 psi | 62% | 2552 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,679 psi | 53% | 2493 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,557 psi | 70% | 2710 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 44,164 psi | 66% | 2700 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,253 psi | 71% | 2753 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,294 psi | 65% | 2575 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 39,479 psi | 59% | 2546 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 33,127 psi | 50% | 2421 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 42,424 psi | 64% | 2608 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 80% | 33,881 psi | 51% | 2425 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 44,469 psi | 67% | 2602 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,526 psi | 65% | 2585 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,357 psi | 75% | 2641 fps | 100% |
| Hodgdon Retumbo | 64.2 gr | 80% | 34,853 psi | 52% | 2526 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 42% | 1594 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,170 psi | 78% | 2697 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,663 psi | 79% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,440 psi | 68% | 2592 fps | 98% |
| IMR 7828 SSC | <<locked>> | 80% | 40,480 psi | 61% | 2582 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 88% | 34,171 psi | 51% | 2467 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 55,840 psi | 84% | 2726 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 54,172 psi | 81% | 2723 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,709 psi | 55% | 2421 fps | 99.2% |
| Norma 204 | <<locked>> | 80% | 52,982 psi | 79% | 2746 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 29,979 psi | 45% | 2375 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 45,034 psi | 68% | 2674 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 54,041 psi | 81% | 2740 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,567 psi | 61% | 2595 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 80% | 53,055 psi | 80% | 2746 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,434 psi | 55% | 2477 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,964 psi | 43% | 1634 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 56,144 psi | 84% | 2779 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 54,650 psi | 82% | 2805 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,026 psi | 51% | 2500 fps | 98.3% |
| ReloadSwiss RS 80 | 74.4 gr | 86% | 38,827 psi | 58% | 2582 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 47,282 psi | 71% | 2631 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 46,137 psi | 69% | 2644 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,840 psi | 84% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 54,172 psi | 81% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,621 psi | 82% | 2680 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,803 psi | 69% | 2641 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 48,283 psi | 72% | 2621 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 51,938 psi | 78% | 2694 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,412 psi | 70% | 2618 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 55,492 psi | 83% | 2730 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,509 psi | 61% | 2500 fps | 98.7% |
| Vihtavuori N170 | <<locked>> | 92% | 51,822 psi | 78% | 2720 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 54,810 psi | 82% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,847 psi | 69% | 2628 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,759 psi | 67% | 2671 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 80% | 37,231 psi | 56% | 2497 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 86% | 40,176 psi | 60% | 2602 fps | 95.5% |
| Vihtavuori N570 | 76.6 gr | 92% | 47,253 psi | 71% | 2776 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,955 psi | 82% | 2680 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,160 psi | 59% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,801 psi | 64% | 2552 fps | 98.8% |
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 67 powders for 7 mm STW loaded with the .284 | 171gr | Barnes Match Burner BT. Alliant Reloder-33 delivers the highest muzzle velocity at 2,969 fps; across all powders the maximum-charge window runs from 1,781 fps to 2,969 fps. ADI AR 2218 gives the best case fill at 100 %, and 67 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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 | 171gr | Barnes Match Burner BT 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.