Load Specifications
Load data in caliber 7 mm STW with .284 | 168gr | Sierra MatchKing bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N570.
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% | 59,683 psi | 89% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 60,031 psi | 90% | 2838 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 58,755 psi | 88% | 2930 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 57,130 psi | 86% | 2854 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 59,437 psi | 89% | 2927 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 58,102 psi | 87% | 2900 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,505 psi | 82% | 2949 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,666 psi | 85% | 2920 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,363 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,753 psi | 85% | 2844 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 59,785 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,885 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,102 psi | 87% | 2897 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 58,624 psi | 88% | 2910 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,043 psi | 84% | 2930 fps | 98.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,474 psi | 77% | 2848 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 59,843 psi | 90% | 2884 fps | 98.7% |
| Bofors RP15 | <<locked>> | 92% | 59,117 psi | 89% | 2907 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 57,798 psi | 87% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 59,785 psi | 90% | 2917 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 59,799 psi | 90% | 2923 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 58,639 psi | 88% | 2861 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,464 psi | 86% | 2844 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,392 psi | 86% | 2762 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,101 psi | 86% | 2982 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 57% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 59,451 psi | 89% | 2828 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 60,191 psi | 90% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,755 psi | 88% | 2835 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 57,914 psi | 87% | 2910 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,953 psi | 78% | 2841 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 59,538 psi | 89% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,001 psi | 87% | 2805 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,537 psi | 86% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,043 psi | 86% | 2831 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 52,910 psi | 79% | 2864 fps | 100% |
| Norma MRP | <<locked>> | 88% | 60,075 psi | 90% | 2936 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,030 psi | 87% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 59,277 psi | 89% | 2930 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,029 psi | 85% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,595 psi | 86% | 2861 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,609 psi | 58% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 60,365 psi | 90% | 2861 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 59,117 psi | 89% | 2890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 58,146 psi | 87% | 2972 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,363 psi | 86% | 2936 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 86% | 57,711 psi | 87% | 2825 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 56,579 psi | 85% | 2838 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 59,538 psi | 89% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,001 psi | 87% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,508 psi | 88% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 59,988 psi | 90% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 59,408 psi | 89% | 2818 fps | 99.7% |
| Somchem S365 | <<locked>> | 84% | 59,712 psi | 90% | 2822 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,985 psi | 85% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 59,495 psi | 89% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,666 psi | 85% | 2792 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 59,712 psi | 90% | 2867 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 82% | 58,856 psi | 88% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 59,727 psi | 90% | 2851 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 59,437 psi | 89% | 2940 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 56,420 psi | 85% | 2871 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 96% | 57,856 psi | 87% | 2936 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 59,176 psi | 89% | 2999 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,132 psi | 89% | 2759 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,856 psi | 87% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,811 psi | 85% | 2805 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% | 42,728 psi | 64% | 2562 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 56,217 psi | 84% | 2789 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,280 psi | 66% | 2680 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 80% | 46,847 psi | 70% | 2687 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 41,989 psi | 63% | 2628 fps | 97.5% |
| ADI AR 2217 | <<locked>> | 84% | 35,853 psi | 54% | 2490 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 96% | 46,978 psi | 70% | 2805 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 28,761 psi | 43% | 2343 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,693 psi | 80% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,673 psi | 70% | 2680 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,728 psi | 64% | 2635 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,510 psi | 62% | 2579 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,955 psi | 54% | 2520 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,007 psi | 70% | 2740 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 44,672 psi | 67% | 2730 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,630 psi | 71% | 2782 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,569 psi | 65% | 2605 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 39,798 psi | 60% | 2572 fps | 97.9% |
| Bofors RP30 | <<locked>> | 80% | 33,417 psi | 50% | 2448 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 42,728 psi | 64% | 2635 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 80% | 34,113 psi | 51% | 2451 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 44,730 psi | 67% | 2631 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,801 psi | 66% | 2615 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,517 psi | 76% | 2667 fps | 100% |
| Hodgdon Retumbo | 65.4 gr | 80% | 35,085 psi | 53% | 2552 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 42% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,489 psi | 79% | 2726 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,982 psi | 79% | 2730 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,730 psi | 69% | 2621 fps | 98% |
| IMR 7828 SSC | <<locked>> | 80% | 40,785 psi | 61% | 2612 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 88% | 34,519 psi | 52% | 2493 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 55,985 psi | 84% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 54,491 psi | 82% | 2753 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,912 psi | 55% | 2444 fps | 99.2% |
| Norma 204 | <<locked>> | 80% | 53,272 psi | 80% | 2776 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 30,211 psi | 45% | 2402 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 45,295 psi | 68% | 2703 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 54,404 psi | 82% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,828 psi | 61% | 2621 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 80% | 53,345 psi | 80% | 2776 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,651 psi | 55% | 2503 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,964 psi | 43% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 56,405 psi | 85% | 2808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,100 psi | 83% | 2835 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,330 psi | 51% | 2530 fps | 98.3% |
| ReloadSwiss RS 80 | 75.8 gr | 86% | 39,218 psi | 59% | 2608 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 47,601 psi | 71% | 2661 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 46,267 psi | 69% | 2667 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,985 psi | 84% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 54,491 psi | 82% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,911 psi | 82% | 2707 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,919 psi | 69% | 2664 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 48,646 psi | 73% | 2651 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 52,286 psi | 78% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,702 psi | 70% | 2648 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 55,840 psi | 84% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,785 psi | 61% | 2530 fps | 98.7% |
| Vihtavuori N170 | <<locked>> | 92% | 52,141 psi | 78% | 2749 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 55,085 psi | 83% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,021 psi | 69% | 2651 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,005 psi | 67% | 2697 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 80% | 37,492 psi | 56% | 2523 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 86% | 40,466 psi | 61% | 2628 fps | 95.5% |
| Vihtavuori N570 | 78 gr | 92% | 47,645 psi | 71% | 2805 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 55,332 psi | 83% | 2710 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,537 psi | 59% | 2631 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,047 psi | 65% | 2579 fps | 98.7% |
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 | 168gr | Sierra MatchKing. Vihtavuori N570 delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,804 fps to 2,999 fps. ADI AR 2218 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 168.0 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, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for 7 mm STW with the .284 | 168gr | 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.