Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Sierra MatchKing 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>> | 90% | 60,292 psi | 90% | 2776 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 59,524 psi | 89% | 2890 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 57,798 psi | 87% | 2812 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 60,075 psi | 90% | 2881 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 58,769 psi | 88% | 2858 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,969 psi | 82% | 2910 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,232 psi | 86% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,088 psi | 87% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,174 psi | 86% | 2799 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,579 psi | 85% | 2818 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,479 psi | 88% | 2779 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,682 psi | 88% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 59,451 psi | 89% | 2867 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,565 psi | 85% | 2890 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,083 psi | 78% | 2815 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 60,350 psi | 90% | 2841 fps | 99% |
| Bofors RP15 | <<locked>> | 92% | 59,538 psi | 89% | 2861 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,392 psi | 88% | 2867 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,579 psi | 85% | 2818 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,362 psi | 84% | 2825 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,205 psi | 89% | 2818 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,001 psi | 87% | 2799 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,117 psi | 87% | 2717 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,769 psi | 87% | 2936 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,797 psi | 57% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 59,973 psi | 90% | 2779 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,985 psi | 85% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,393 psi | 89% | 2792 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 58,320 psi | 87% | 2861 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,620 psi | 79% | 2802 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 59,959 psi | 90% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,407 psi | 88% | 2756 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,349 psi | 87% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,624 psi | 86% | 2789 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,664 psi | 80% | 2822 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,637 psi | 85% | 2831 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,508 psi | 88% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 59,872 psi | 90% | 2887 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,638 psi | 86% | 2785 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,276 psi | 87% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,740 psi | 58% | 1808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 59,669 psi | 89% | 2841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 58,813 psi | 88% | 2927 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,088 psi | 87% | 2897 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 58,320 psi | 87% | 2779 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,014 psi | 85% | 2792 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 59,959 psi | 90% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,407 psi | 88% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,972 psi | 88% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,608 psi | 85% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 59,756 psi | 90% | 2772 fps | 99.8% |
| Somchem S365 | <<locked>> | 84% | 60,307 psi | 90% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,421 psi | 86% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 60,249 psi | 90% | 2762 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,232 psi | 86% | 2746 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 60,205 psi | 90% | 2825 fps | 97.6% |
| Vihtavuori N550 | <<locked>> | 82% | 59,408 psi | 89% | 2769 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,637 psi | 85% | 2759 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 60,118 psi | 90% | 2894 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 56,942 psi | 85% | 2828 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 58,682 psi | 88% | 2900 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 98% | 59,857 psi | 90% | 2959 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,596 psi | 89% | 2710 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,784 psi | 88% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,130 psi | 86% | 2759 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% | 43,308 psi | 65% | 2526 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,846 psi | 67% | 2648 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 47,224 psi | 71% | 2644 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 42,583 psi | 64% | 2592 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 33,837 psi | 51% | 2398 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 44,164 psi | 66% | 2700 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,066 psi | 44% | 2313 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,302 psi | 81% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,224 psi | 71% | 2641 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,337 psi | 65% | 2598 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,047 psi | 63% | 2539 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,332 psi | 54% | 2484 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,456 psi | 71% | 2697 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,150 psi | 68% | 2697 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 44,962 psi | 67% | 2684 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,845 psi | 66% | 2566 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 40,321 psi | 60% | 2539 fps | 98.4% |
| Bofors RP30 | <<locked>> | 80% | 33,939 psi | 51% | 2418 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 43,337 psi | 65% | 2598 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 34,461 psi | 52% | 2415 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 45,150 psi | 68% | 2592 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,382 psi | 67% | 2575 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,068 psi | 77% | 2625 fps | 100% |
| Hodgdon Retumbo | 64.1 gr | 80% | 35,491 psi | 53% | 2520 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,340 psi | 42% | 1578 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,837 psi | 79% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,403 psi | 80% | 2680 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,064 psi | 69% | 2579 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 41,176 psi | 62% | 2572 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 34,911 psi | 52% | 2461 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 56,507 psi | 85% | 2707 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 55,042 psi | 83% | 2707 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,318 psi | 56% | 2408 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 53,751 psi | 81% | 2733 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 28,660 psi | 43% | 2316 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 45,861 psi | 69% | 2664 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 55,013 psi | 82% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,350 psi | 62% | 2589 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 53,853 psi | 81% | 2730 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,188 psi | 56% | 2470 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,080 psi | 44% | 1617 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,521 psi | 83% | 2789 fps | 100% |
| ReloadSwiss RS 76 | 68.6 gr | 80% | 34,708 psi | 52% | 2497 fps | 98.7% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,811 psi | 55% | 2513 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 48,124 psi | 72% | 2621 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 46,833 psi | 70% | 2631 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 56,507 psi | 85% | 2707 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 55,042 psi | 83% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,303 psi | 83% | 2664 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,499 psi | 70% | 2628 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 48,979 psi | 73% | 2612 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 52,765 psi | 79% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,311 psi | 71% | 2608 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 56,463 psi | 85% | 2713 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 41,321 psi | 62% | 2493 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 49,356 psi | 74% | 2657 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 55,550 psi | 83% | 2717 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,586 psi | 70% | 2612 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,542 psi | 68% | 2657 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 37,927 psi | 57% | 2487 fps | 96.4% |
| Vihtavuori N568 | <<locked>> | 84% | 38,116 psi | 57% | 2533 fps | 95% |
| Vihtavuori N570 | 74.9 gr | 90% | 45,020 psi | 67% | 2707 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 55,709 psi | 84% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,147 psi | 60% | 2595 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,468 psi | 65% | 2539 fps | 99% |
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 | Sierra MatchKing. Vihtavuori N570 delivers the highest muzzle velocity at 2,959 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,959 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 57–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:10.0 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 | Sierra MatchKing 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.