Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Barnes Solid RN bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 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% | 56,666 psi | 85% | 2730 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 59,480 psi | 89% | 2887 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 57,798 psi | 87% | 2812 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 60,350 psi | 90% | 2884 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 58,769 psi | 88% | 2858 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,187 psi | 83% | 2913 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,508 psi | 86% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,117 psi | 87% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,406 psi | 86% | 2799 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,826 psi | 85% | 2822 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,465 psi | 88% | 2779 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,914 psi | 88% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 59,480 psi | 89% | 2867 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,811 psi | 85% | 2894 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,315 psi | 78% | 2815 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,768 psi | 85% | 2789 fps | 98.5% |
| Bofors RP15 | <<locked>> | 92% | 59,799 psi | 90% | 2861 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,639 psi | 88% | 2871 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,826 psi | 85% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,376 psi | 85% | 2822 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,190 psi | 89% | 2815 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,233 psi | 87% | 2802 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,160 psi | 87% | 2717 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,044 psi | 87% | 2940 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,695 psi | 56% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 59,973 psi | 90% | 2779 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,246 psi | 86% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,393 psi | 89% | 2792 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 58,552 psi | 88% | 2864 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,634 psi | 79% | 2799 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 60,191 psi | 90% | 2756 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,697 psi | 88% | 2759 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,305 psi | 87% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,638 psi | 86% | 2789 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,925 psi | 81% | 2825 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,913 psi | 85% | 2835 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,755 psi | 88% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 60,133 psi | 90% | 2890 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,638 psi | 86% | 2782 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,508 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,638 psi | 58% | 1804 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 59,915 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,103 psi | 89% | 2930 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,349 psi | 87% | 2900 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 58,305 psi | 87% | 2779 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,290 psi | 86% | 2795 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 60,191 psi | 90% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,697 psi | 88% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,987 psi | 88% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,898 psi | 85% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 59,959 psi | 90% | 2776 fps | 99.8% |
| Somchem S365 | <<locked>> | 84% | 60,336 psi | 90% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,435 psi | 86% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 60,278 psi | 90% | 2762 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,464 psi | 86% | 2749 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,405 psi | 85% | 2769 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 82% | 59,408 psi | 89% | 2769 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,637 psi | 85% | 2756 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 60,147 psi | 90% | 2894 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 57,188 psi | 86% | 2831 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 58,682 psi | 88% | 2897 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 98% | 60,104 psi | 90% | 2963 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,857 psi | 90% | 2713 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,827 psi | 88% | 2867 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,392 psi | 86% | 2762 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% | 43,337 psi | 65% | 2523 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,904 psi | 67% | 2648 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 47,471 psi | 71% | 2648 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 42,627 psi | 64% | 2592 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 34,011 psi | 51% | 2402 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 94% | 44,324 psi | 66% | 2703 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 29,080 psi | 44% | 2313 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,331 psi | 81% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,253 psi | 71% | 2638 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,366 psi | 65% | 2598 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,119 psi | 63% | 2539 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,506 psi | 55% | 2484 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,732 psi | 72% | 2700 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,368 psi | 68% | 2697 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 44,933 psi | 67% | 2680 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,034 psi | 66% | 2569 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 40,364 psi | 61% | 2536 fps | 98.4% |
| Bofors RP30 | <<locked>> | 80% | 33,968 psi | 51% | 2418 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 43,366 psi | 65% | 2598 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 34,476 psi | 52% | 2415 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 45,179 psi | 68% | 2592 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,396 psi | 67% | 2575 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,126 psi | 77% | 2625 fps | 100% |
| Hodgdon Retumbo | 64.2 gr | 80% | 35,534 psi | 53% | 2520 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,282 psi | 42% | 1578 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,055 psi | 80% | 2684 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,650 psi | 80% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,267 psi | 69% | 2585 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 41,394 psi | 62% | 2575 fps | 97.8% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,099 psi | 53% | 2464 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 56,536 psi | 85% | 2707 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 55,071 psi | 83% | 2710 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,333 psi | 56% | 2408 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 53,983 psi | 81% | 2736 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 28,703 psi | 43% | 2316 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 46,079 psi | 69% | 2667 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 55,056 psi | 83% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,394 psi | 62% | 2585 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 54,070 psi | 81% | 2733 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,231 psi | 56% | 2467 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 43% | 1614 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,782 psi | 84% | 2792 fps | 100% |
| ReloadSwiss RS 76 | 68.8 gr | 80% | 34,882 psi | 52% | 2497 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,999 psi | 55% | 2516 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 48,153 psi | 72% | 2621 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 46,891 psi | 70% | 2631 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 56,536 psi | 85% | 2707 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 55,071 psi | 83% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,332 psi | 83% | 2661 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,543 psi | 70% | 2628 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 49,153 psi | 74% | 2612 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 53,011 psi | 79% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,311 psi | 71% | 2608 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 56,478 psi | 85% | 2713 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 41,365 psi | 62% | 2493 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 49,356 psi | 74% | 2657 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 55,796 psi | 84% | 2720 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,833 psi | 70% | 2612 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,745 psi | 69% | 2661 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 37,971 psi | 57% | 2487 fps | 96.4% |
| Vihtavuori N568 | <<locked>> | 84% | 38,305 psi | 57% | 2536 fps | 95.1% |
| Vihtavuori N570 | 75 gr | 90% | 45,049 psi | 68% | 2707 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 55,956 psi | 84% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,379 psi | 61% | 2598 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,671 psi | 65% | 2543 fps | 99.1% |
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 65 powders for 7 mm STW loaded with the .284 | 175gr | Barnes Solid RN. Vihtavuori N570 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,963 fps. ADI AR 2218 gives the best case fill at 100 %, and 65 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:10.5 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, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 175gr | Barnes Solid RN 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.