Load Specifications
Load data in caliber 7 mm STW with .284 | 174gr | Prvi Partizan FMJ BT 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% | 57,885 psi | 87% | 2753 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,898 psi | 85% | 2858 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 59,103 psi | 89% | 2838 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,638 psi | 86% | 2854 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 56,347 psi | 84% | 2831 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,840 psi | 85% | 2949 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 59,335 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,437 psi | 89% | 2822 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,639 psi | 88% | 2828 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,073 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 60,046 psi | 90% | 2805 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,550 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,884 psi | 85% | 2841 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,668 psi | 88% | 2930 fps | 98.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,302 psi | 81% | 2854 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,030 psi | 87% | 2815 fps | 98.8% |
| Bofors RP15 | <<locked>> | 90% | 57,464 psi | 86% | 2838 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 60,278 psi | 90% | 2904 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 58,073 psi | 87% | 2848 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,957 psi | 87% | 2854 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,565 psi | 85% | 2789 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,379 psi | 89% | 2831 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,364 psi | 89% | 2740 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,886 psi | 90% | 2969 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,753 psi | 57% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,392 psi | 86% | 2756 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,421 psi | 88% | 2759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,884 psi | 85% | 2766 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 60,075 psi | 90% | 2894 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,132 psi | 89% | 2769 fps | 96% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,360 psi | 81% | 2831 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,814 psi | 90% | 2782 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,814 psi | 90% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,943 psi | 88% | 2815 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,564 psi | 83% | 2854 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,407 psi | 88% | 2864 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,959 psi | 90% | 2799 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,334 psi | 86% | 2861 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,929 psi | 88% | 2808 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 60,133 psi | 90% | 2848 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,856 psi | 58% | 1821 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,449 psi | 85% | 2900 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 60,292 psi | 90% | 2933 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 59,538 psi | 89% | 2808 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,566 psi | 88% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,814 psi | 90% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 60,249 psi | 90% | 2740 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,175 psi | 87% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,116 psi | 86% | 2746 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 57,740 psi | 87% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,871 psi | 88% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,798 psi | 88% | 2779 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,914 psi | 87% | 2802 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 86% | 58,073 psi | 87% | 2782 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,769 psi | 87% | 2871 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 58,784 psi | 88% | 2864 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 94% | 56,318 psi | 84% | 2871 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 96% | 57,638 psi | 86% | 2933 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,492 psi | 85% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,769 psi | 88% | 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% | 44,411 psi | 67% | 2549 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,108 psi | 69% | 2677 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 80% | 48,370 psi | 73% | 2674 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,656 psi | 65% | 2621 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 34,867 psi | 52% | 2431 fps | 96% |
| ADI AR 2218 | <<locked>> | 94% | 45,629 psi | 68% | 2740 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 29,878 psi | 45% | 2343 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,666 psi | 83% | 2769 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,341 psi | 72% | 2667 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,454 psi | 67% | 2628 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,120 psi | 65% | 2562 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,405 psi | 56% | 2510 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,110 psi | 74% | 2730 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,468 psi | 65% | 2667 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,586 psi | 70% | 2720 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,974 psi | 63% | 2536 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 41,408 psi | 62% | 2566 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 34,983 psi | 52% | 2448 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 44,454 psi | 67% | 2628 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 35,360 psi | 53% | 2444 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 80% | 46,180 psi | 69% | 2621 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,411 psi | 68% | 2605 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,141 psi | 78% | 2648 fps | 100% |
| Hodgdon Retumbo | 65.9 gr | 80% | 36,506 psi | 55% | 2549 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 43% | 1591 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,940 psi | 81% | 2707 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,636 psi | 82% | 2710 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,050 psi | 71% | 2608 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 42,496 psi | 64% | 2608 fps | 98.1% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,492 psi | 83% | 2717 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,765 psi | 51% | 2438 fps | 95.4% |
| Lovex S070 | <<locked>> | 80% | 56,202 psi | 84% | 2733 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,290 psi | 57% | 2434 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 55,042 psi | 83% | 2762 fps | 100% |
| Norma 217 | <<locked>> | 82% | 29,631 psi | 44% | 2346 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 47,210 psi | 71% | 2694 fps | 100% |
| Norma URP | <<locked>> | 80% | 56,275 psi | 84% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,699 psi | 64% | 2618 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 80% | 55,172 psi | 83% | 2759 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,363 psi | 57% | 2500 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 44% | 1627 fps | 100% |
| ReloadSwiss RS 76 | 70.6 gr | 80% | 35,911 psi | 54% | 2530 fps | 99.1% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,276 psi | 57% | 2549 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 49,008 psi | 73% | 2644 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 48,008 psi | 72% | 2657 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 56,202 psi | 84% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,347 psi | 84% | 2687 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,659 psi | 71% | 2654 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 50,212 psi | 75% | 2641 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 54,099 psi | 81% | 2703 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,370 psi | 73% | 2631 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,337 psi | 63% | 2516 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 90% | 50,662 psi | 76% | 2687 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 47,863 psi | 72% | 2638 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,833 psi | 70% | 2690 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,117 psi | 59% | 2520 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 39,392 psi | 59% | 2562 fps | 95.5% |
| Vihtavuori N570 | 77 gr | 90% | 46,528 psi | 70% | 2743 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,713 psi | 63% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,643 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 67 powders for 7 mm STW loaded with the .284 | 174gr | Prvi Partizan FMJ BT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,969 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,969 fps. Accurate 8700 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 57–90 %, leaving at least 10 % headroom. The 174.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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 | 174gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Ramshot LRT, Vihtavuori 24N41 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.