Load Specifications
Load data in caliber 7 mm STW with .284 | 174gr | Prvi Partizan SP 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.
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% | 57,638 psi | 86% | 2749 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,608 psi | 85% | 2854 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 58,813 psi | 88% | 2835 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,319 psi | 86% | 2851 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 60,118 psi | 90% | 2884 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,420 psi | 85% | 2940 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,827 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,074 psi | 89% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,363 psi | 87% | 2822 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,754 psi | 87% | 2844 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,495 psi | 89% | 2799 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 60,104 psi | 90% | 2874 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,565 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,204 psi | 87% | 2923 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,650 psi | 80% | 2844 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,638 psi | 86% | 2808 fps | 98.7% |
| Bofors RP15 | <<locked>> | 90% | 56,985 psi | 85% | 2831 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 59,741 psi | 90% | 2894 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,754 psi | 87% | 2844 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,479 psi | 86% | 2848 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 60,104 psi | 90% | 2838 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,103 psi | 89% | 2825 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,045 psi | 89% | 2736 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,321 psi | 89% | 2966 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 57% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,087 psi | 86% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,088 psi | 87% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 60,263 psi | 90% | 2815 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 90% | 59,538 psi | 89% | 2887 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,726 psi | 88% | 2762 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,925 psi | 81% | 2828 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,509 psi | 89% | 2779 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,306 psi | 89% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,624 psi | 88% | 2812 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,042 psi | 83% | 2848 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,870 psi | 87% | 2858 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,640 psi | 89% | 2792 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,014 psi | 85% | 2854 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,653 psi | 88% | 2805 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,611 psi | 89% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 58% | 1818 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,188 psi | 84% | 2897 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 59,553 psi | 89% | 2923 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 59,234 psi | 89% | 2802 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,044 psi | 87% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,509 psi | 89% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,712 psi | 90% | 2730 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,653 psi | 86% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,913 psi | 85% | 2743 fps | 99.6% |
| Somchem S365 | <<locked>> | 82% | 57,392 psi | 86% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,378 psi | 88% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,349 psi | 87% | 2769 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,493 psi | 86% | 2795 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 86% | 57,725 psi | 87% | 2779 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,290 psi | 86% | 2861 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 58,262 psi | 87% | 2854 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 59,930 psi | 90% | 2923 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 96% | 57,159 psi | 86% | 2927 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 60,249 psi | 90% | 2890 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,247 psi | 87% | 2782 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% | 44,121 psi | 66% | 2546 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,803 psi | 69% | 2671 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 48,066 psi | 72% | 2667 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 43,366 psi | 65% | 2615 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 34,650 psi | 52% | 2425 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 94% | 45,266 psi | 68% | 2733 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 29,646 psi | 44% | 2336 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,347 psi | 83% | 2766 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,051 psi | 72% | 2661 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,135 psi | 66% | 2618 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,975 psi | 64% | 2562 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,130 psi | 56% | 2503 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,776 psi | 73% | 2723 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,033 psi | 65% | 2657 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,209 psi | 69% | 2713 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,527 psi | 67% | 2589 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 41,147 psi | 62% | 2559 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 34,708 psi | 52% | 2441 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 44,135 psi | 66% | 2618 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 35,128 psi | 53% | 2438 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 80% | 45,919 psi | 69% | 2615 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,136 psi | 68% | 2598 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,822 psi | 78% | 2641 fps | 100% |
| Hodgdon Retumbo | 65.5 gr | 80% | 36,245 psi | 54% | 2546 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 43% | 1591 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,650 psi | 80% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,302 psi | 81% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,789 psi | 70% | 2602 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 42,192 psi | 63% | 2598 fps | 98% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,085 psi | 83% | 2710 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,373 psi | 50% | 2428 fps | 95.3% |
| Lovex S070 | <<locked>> | 80% | 55,898 psi | 84% | 2730 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,000 psi | 57% | 2428 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 54,766 psi | 82% | 2756 fps | 100% |
| Norma 217 | <<locked>> | 82% | 29,385 psi | 44% | 2339 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 46,876 psi | 70% | 2687 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,956 psi | 84% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,206 psi | 63% | 2608 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 80% | 54,853 psi | 82% | 2753 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,116 psi | 57% | 2493 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 44% | 1627 fps | 100% |
| ReloadSwiss RS 76 | 70.1 gr | 80% | 35,520 psi | 53% | 2520 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,811 psi | 57% | 2539 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 48,936 psi | 73% | 2644 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 47,688 psi | 71% | 2654 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 55,898 psi | 84% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,086 psi | 84% | 2684 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,369 psi | 71% | 2648 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,792 psi | 75% | 2631 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 53,751 psi | 81% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,080 psi | 72% | 2628 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,076 psi | 63% | 2513 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 50,256 psi | 75% | 2680 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 47,543 psi | 71% | 2631 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,514 psi | 70% | 2684 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 38,682 psi | 58% | 2510 fps | 96.7% |
| Vihtavuori N568 | <<locked>> | 84% | 39,131 psi | 59% | 2559 fps | 95.4% |
| Vihtavuori N570 | 76.5 gr | 90% | 46,093 psi | 69% | 2733 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,336 psi | 62% | 2618 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,382 psi | 67% | 2566 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 67 powders for 7 mm STW loaded with the .284 | 174gr | Prvi Partizan SP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,966 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 1:11.5 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 SP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, Hodgdon US 869, Lovex D100 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.