Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Speer Magnum Tip Soft Point bullet and 59 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 76 and ReloadSwiss RS 80.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 58,450 psi | 88% | 2753 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,450 psi | 86% | 2861 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 59,654 psi | 89% | 2838 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 58,204 psi | 87% | 2858 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 56,927 psi | 85% | 2835 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,319 psi | 86% | 2949 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 59,944 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,770 psi | 90% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 59,176 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,624 psi | 88% | 2848 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 60,365 psi | 90% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,159 psi | 86% | 2831 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,522 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 59,495 psi | 89% | 2933 fps | 99% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,853 psi | 82% | 2858 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,494 psi | 88% | 2818 fps | 98.9% |
| Bofors RP15 | <<locked>> | 90% | 57,783 psi | 87% | 2838 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 56,811 psi | 85% | 2848 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 58,624 psi | 88% | 2848 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 58,552 psi | 88% | 2854 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,087 psi | 86% | 2792 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,915 psi | 90% | 2831 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,930 psi | 90% | 2740 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,347 psi | 84% | 2913 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,768 psi | 57% | 1775 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,899 psi | 87% | 2756 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,726 psi | 88% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,392 psi | 86% | 2769 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 88% | 56,536 psi | 85% | 2841 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,596 psi | 89% | 2769 fps | 96.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,940 psi | 82% | 2835 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 60,075 psi | 90% | 2779 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 60,118 psi | 90% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 82% | 59,451 psi | 89% | 2818 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,173 psi | 84% | 2858 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,740 psi | 88% | 2861 fps | 100% |
| Norma URP | <<locked>> | 82% | 60,278 psi | 90% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,928 psi | 87% | 2861 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 59,495 psi | 89% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 56,478 psi | 85% | 2795 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 58% | 1818 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,377 psi | 86% | 2904 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,463 psi | 85% | 2874 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 60,031 psi | 90% | 2808 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,900 psi | 88% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 60,075 psi | 90% | 2779 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,508 psi | 88% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,609 psi | 86% | 2746 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 58,349 psi | 87% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 59,176 psi | 89% | 2789 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 59,335 psi | 89% | 2779 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 58,392 psi | 88% | 2805 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 86% | 58,639 psi | 88% | 2785 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 58,088 psi | 87% | 2867 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 59,292 psi | 89% | 2864 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 56,869 psi | 85% | 2871 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 96% | 58,233 psi | 87% | 2936 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,174 psi | 86% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 59,263 psi | 89% | 2789 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% | 44,715 psi | 67% | 2549 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,601 psi | 70% | 2677 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 48,863 psi | 73% | 2674 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,961 psi | 66% | 2621 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 80% | 32,851 psi | 49% | 2375 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 94% | 46,064 psi | 69% | 2746 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 30,226 psi | 45% | 2349 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 56,014 psi | 84% | 2769 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,631 psi | 73% | 2664 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,730 psi | 67% | 2625 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,613 psi | 65% | 2566 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,869 psi | 57% | 2513 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,676 psi | 74% | 2730 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,961 psi | 66% | 2671 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 96% | 47,137 psi | 71% | 2723 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,337 psi | 63% | 2539 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 41,713 psi | 63% | 2566 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 35,273 psi | 53% | 2448 fps | 96.4% |
| Bofors RP5 | <<locked>> | 80% | 44,730 psi | 67% | 2625 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 35,752 psi | 54% | 2448 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 80% | 46,630 psi | 70% | 2621 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,672 psi | 68% | 2605 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,692 psi | 79% | 2648 fps | 100% |
| Hodgdon Retumbo | 66.2 gr | 80% | 36,985 psi | 55% | 2556 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 43% | 1588 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,447 psi | 82% | 2707 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 55,143 psi | 83% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,471 psi | 71% | 2612 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 42,815 psi | 64% | 2605 fps | 98.2% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,927 psi | 84% | 2717 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,084 psi | 51% | 2438 fps | 95.7% |
| Lovex S070 | <<locked>> | 80% | 56,492 psi | 85% | 2733 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,566 psi | 58% | 2434 fps | 99.7% |
| Norma 204 | <<locked>> | 80% | 55,579 psi | 83% | 2762 fps | 100% |
| Norma 217 | <<locked>> | 80% | 27,905 psi | 42% | 2290 fps | 95% |
| Norma MRP | <<locked>> | 80% | 47,703 psi | 72% | 2694 fps | 100% |
| Norma URP | <<locked>> | 80% | 56,594 psi | 85% | 2746 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,047 psi | 65% | 2618 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 80% | 55,695 psi | 83% | 2759 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,827 psi | 58% | 2500 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 44% | 1627 fps | 100% |
| ReloadSwiss RS 76 | 70.8 gr | 80% | 36,187 psi | 54% | 2530 fps | 99.2% |
| ReloadSwiss RS 80 | 75 gr | 84% | 38,725 psi | 58% | 2552 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 49,501 psi | 74% | 2648 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 48,327 psi | 72% | 2657 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 56,492 psi | 85% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,979 psi | 72% | 2654 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 50,473 psi | 76% | 2638 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 54,650 psi | 82% | 2703 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,646 psi | 73% | 2631 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,598 psi | 64% | 2516 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 47,805 psi | 72% | 2631 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 48,211 psi | 72% | 2635 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,297 psi | 71% | 2690 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 39,392 psi | 59% | 2520 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 39,842 psi | 60% | 2569 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 88% | 43,816 psi | 66% | 2680 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,279 psi | 63% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,933 psi | 67% | 2569 fps | 99.3% |
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 59 powders for 7 mm STW loaded with the .284 | 175gr | Speer Magnum Tip Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,775 fps to 2,949 fps. ADI AR 2218 gives the best case fill at 100 %, and 59 of the 59 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 175.0 gr projectile in 0.284" calls for a 1:12.5 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 175gr | Speer Magnum Tip Soft Point 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.