Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Woodleigh PP SN bullet and 62 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.
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% | 57,493 psi | 86% | 2740 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,507 psi | 85% | 2844 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 58,653 psi | 88% | 2822 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,232 psi | 86% | 2841 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 60,046 psi | 90% | 2874 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,202 psi | 84% | 2930 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,755 psi | 88% | 2894 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 58,871 psi | 88% | 2822 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,900 psi | 88% | 2805 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,218 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,667 psi | 86% | 2835 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,596 psi | 89% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 60,002 psi | 90% | 2864 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,434 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,175 psi | 87% | 2913 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,403 psi | 80% | 2835 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,580 psi | 86% | 2802 fps | 98.7% |
| Bofors RP15 | <<locked>> | 90% | 56,840 psi | 85% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 59,683 psi | 89% | 2884 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,667 psi | 86% | 2835 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,406 psi | 86% | 2838 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 60,220 psi | 90% | 2831 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,016 psi | 88% | 2815 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,088 psi | 89% | 2730 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,234 psi | 89% | 2956 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,753 psi | 57% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,130 psi | 86% | 2743 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,928 psi | 87% | 2743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 60,133 psi | 90% | 2805 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 90% | 59,683 psi | 89% | 2884 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,653 psi | 88% | 2753 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,838 psi | 81% | 2818 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,306 psi | 89% | 2769 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,146 psi | 89% | 2759 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,479 psi | 88% | 2802 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,940 psi | 82% | 2841 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,754 psi | 87% | 2848 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,451 psi | 89% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,884 psi | 85% | 2848 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,494 psi | 88% | 2795 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,567 psi | 89% | 2835 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 58% | 1811 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,883 psi | 84% | 2887 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 59,538 psi | 89% | 2917 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 59,103 psi | 89% | 2795 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,117 psi | 87% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,306 psi | 89% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,756 psi | 90% | 2723 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,740 psi | 87% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,797 psi | 85% | 2733 fps | 99.6% |
| Somchem S365 | <<locked>> | 82% | 57,464 psi | 86% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,479 psi | 88% | 2776 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,218 psi | 87% | 2759 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,464 psi | 86% | 2789 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 82% | 60,278 psi | 90% | 2779 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 57,566 psi | 86% | 2769 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,145 psi | 86% | 2851 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 58,189 psi | 87% | 2848 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 59,872 psi | 90% | 2917 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 96% | 57,116 psi | 86% | 2917 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 60,104 psi | 90% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,131 psi | 87% | 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% | 44,005 psi | 66% | 2536 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,687 psi | 68% | 2661 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 48,095 psi | 72% | 2661 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 43,221 psi | 65% | 2605 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 34,534 psi | 52% | 2418 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 94% | 45,049 psi | 68% | 2720 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 29,675 psi | 44% | 2333 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,327 psi | 72% | 2657 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,100 psi | 83% | 2753 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,877 psi | 72% | 2651 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,990 psi | 66% | 2612 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,801 psi | 64% | 2549 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,115 psi | 56% | 2497 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,646 psi | 73% | 2713 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 42,989 psi | 64% | 2651 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,992 psi | 69% | 2703 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,843 psi | 63% | 2526 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 40,988 psi | 61% | 2549 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 34,592 psi | 52% | 2434 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 43,990 psi | 66% | 2612 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 35,143 psi | 53% | 2434 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 80% | 45,934 psi | 69% | 2608 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,976 psi | 67% | 2589 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,837 psi | 78% | 2635 fps | 100% |
| Hodgdon Retumbo | 65.2 gr | 80% | 36,274 psi | 54% | 2539 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,297 psi | 42% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,693 psi | 80% | 2694 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,302 psi | 81% | 2697 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,818 psi | 70% | 2595 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 42,047 psi | 63% | 2592 fps | 98% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,998 psi | 82% | 2700 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,417 psi | 50% | 2421 fps | 95.3% |
| Lovex S070 | <<locked>> | 80% | 55,724 psi | 84% | 2720 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,985 psi | 57% | 2421 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 54,607 psi | 82% | 2746 fps | 100% |
| Norma 217 | <<locked>> | 82% | 29,254 psi | 44% | 2329 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 46,920 psi | 70% | 2680 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,767 psi | 84% | 2733 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,235 psi | 63% | 2605 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 80% | 54,723 psi | 82% | 2743 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,956 psi | 57% | 2484 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,182 psi | 44% | 1624 fps | 100% |
| ReloadSwiss RS 76 | 69.8 gr | 80% | 35,549 psi | 53% | 2516 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,753 psi | 57% | 2533 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 48,762 psi | 73% | 2635 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 47,529 psi | 71% | 2641 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 55,724 psi | 84% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,130 psi | 84% | 2674 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,181 psi | 71% | 2641 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,850 psi | 75% | 2628 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 53,795 psi | 81% | 2690 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,921 psi | 72% | 2618 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,930 psi | 63% | 2503 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 50,183 psi | 75% | 2674 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 56,405 psi | 85% | 2730 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 47,529 psi | 71% | 2625 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,543 psi | 70% | 2677 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 38,711 psi | 58% | 2507 fps | 96.7% |
| Vihtavuori N568 | <<locked>> | 84% | 39,044 psi | 59% | 2552 fps | 95.4% |
| Vihtavuori N570 | 76.1 gr | 90% | 46,006 psi | 69% | 2726 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,191 psi | 62% | 2608 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,237 psi | 66% | 2556 fps | 99.2% |
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 62 powders for 7 mm STW loaded with the .284 | 175gr | Woodleigh PP SN. Hodgdon Retumbo delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,956 fps. ADI AR 2218 gives the best case fill at 100 %, and 62 of the 62 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 1:11.5 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 175gr | Woodleigh PP SN 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.