Load Specifications
Load data in caliber 7 mm STW with .284 | 180gr | Berger BT Target 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% | 57,754 psi | 87% | 2710 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,681 psi | 85% | 2815 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 58,871 psi | 88% | 2792 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,537 psi | 86% | 2812 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 60,118 psi | 90% | 2841 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,536 psi | 85% | 2907 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,972 psi | 88% | 2861 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,190 psi | 89% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,421 psi | 88% | 2782 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,943 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,683 psi | 89% | 2759 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 60,234 psi | 90% | 2831 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,579 psi | 85% | 2795 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,305 psi | 87% | 2884 fps | 98.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,795 psi | 81% | 2808 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,769 psi | 87% | 2772 fps | 98.9% |
| Bofors RP15 | <<locked>> | 90% | 57,174 psi | 86% | 2792 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 60,002 psi | 90% | 2854 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,943 psi | 87% | 2805 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,667 psi | 86% | 2808 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 60,307 psi | 90% | 2799 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,277 psi | 89% | 2785 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,176 psi | 89% | 2694 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,524 psi | 89% | 2923 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 57% | 1742 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,450 psi | 86% | 2713 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,218 psi | 87% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 60,365 psi | 90% | 2776 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 90% | 59,828 psi | 90% | 2848 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,016 psi | 88% | 2726 fps | 96.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,940 psi | 81% | 2789 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,611 psi | 89% | 2736 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,480 psi | 89% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,871 psi | 88% | 2772 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,361 psi | 83% | 2812 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,102 psi | 87% | 2818 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,785 psi | 90% | 2753 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,305 psi | 86% | 2818 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,885 psi | 88% | 2766 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,872 psi | 90% | 2805 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,769 psi | 58% | 1785 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,260 psi | 84% | 2858 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 59,857 psi | 90% | 2887 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 59,263 psi | 89% | 2759 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,334 psi | 87% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,611 psi | 89% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 60,118 psi | 90% | 2694 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,943 psi | 87% | 2772 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,101 psi | 86% | 2703 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 57,783 psi | 87% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,711 psi | 88% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,523 psi | 88% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,783 psi | 87% | 2762 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 86% | 58,001 psi | 87% | 2740 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,464 psi | 86% | 2825 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 58,436 psi | 88% | 2818 fps | 100% |
| Vihtavuori N568 | <<locked>> | 96% | 60,089 psi | 90% | 2887 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 96% | 57,290 psi | 86% | 2887 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,202 psi | 84% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,450 psi | 88% | 2743 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% | 2510 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,064 psi | 69% | 2638 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 48,327 psi | 72% | 2631 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,482 psi | 65% | 2579 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 32,445 psi | 49% | 2336 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 94% | 45,353 psi | 68% | 2700 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,863 psi | 45% | 2310 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,550 psi | 83% | 2723 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,124 psi | 72% | 2625 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,266 psi | 66% | 2585 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,033 psi | 65% | 2523 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,347 psi | 56% | 2474 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,863 psi | 73% | 2684 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,265 psi | 65% | 2628 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,224 psi | 69% | 2680 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,959 psi | 63% | 2500 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 41,191 psi | 62% | 2523 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 34,795 psi | 52% | 2408 fps | 96.4% |
| Bofors RP5 | <<locked>> | 80% | 44,266 psi | 66% | 2585 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 35,375 psi | 53% | 2411 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 80% | 46,006 psi | 69% | 2579 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,252 psi | 68% | 2562 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,025 psi | 78% | 2602 fps | 100% |
| Hodgdon Retumbo | 64.2 gr | 80% | 36,492 psi | 55% | 2516 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 43% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,925 psi | 81% | 2664 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,563 psi | 82% | 2664 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,021 psi | 70% | 2569 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 42,308 psi | 63% | 2566 fps | 98.3% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,288 psi | 83% | 2671 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,576 psi | 50% | 2402 fps | 95.8% |
| Lovex S070 | <<locked>> | 80% | 55,941 psi | 84% | 2687 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,276 psi | 57% | 2398 fps | 99.7% |
| Norma 204 | <<locked>> | 80% | 54,926 psi | 82% | 2717 fps | 100% |
| Norma 217 | <<locked>> | 80% | 27,586 psi | 41% | 2257 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 47,094 psi | 71% | 2651 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,999 psi | 84% | 2700 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,380 psi | 64% | 2575 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 80% | 55,042 psi | 83% | 2713 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,305 psi | 57% | 2464 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 44% | 1594 fps | 100% |
| ReloadSwiss RS 76 | 68.7 gr | 80% | 35,766 psi | 54% | 2493 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,058 psi | 57% | 2513 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,965 psi | 73% | 2605 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 47,761 psi | 72% | 2615 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 55,941 psi | 84% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,376 psi | 85% | 2644 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,413 psi | 71% | 2612 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 49,995 psi | 75% | 2595 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 54,070 psi | 81% | 2657 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,196 psi | 72% | 2592 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,163 psi | 63% | 2477 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 47,239 psi | 71% | 2592 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 47,790 psi | 72% | 2595 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,717 psi | 70% | 2648 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 38,986 psi | 58% | 2480 fps | 97.1% |
| Vihtavuori N568 | <<locked>> | 84% | 39,291 psi | 59% | 2530 fps | 95.9% |
| Vihtavuori N570 | 73.3 gr | 88% | 43,120 psi | 65% | 2641 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,582 psi | 62% | 2585 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,498 psi | 67% | 2530 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 60 powders for 7 mm STW loaded with the .284 | 180gr | Berger BT Target. Hodgdon Retumbo delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,923 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 180.0 gr projectile in 0.284" calls for a 1:10.0 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 | 180gr | Berger BT Target 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.