Load Specifications
Load data in caliber 7 mm STW with .284 | 165gr | Sierra Tipped GameKing bullet and 73 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 76 and Vihtavuori N560.
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>> | 90% | 57,043 psi | 86% | 2805 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,580 psi | 86% | 2825 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,579 psi | 85% | 2907 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 58,363 psi | 87% | 2890 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,521 psi | 85% | 2900 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,914 psi | 88% | 2930 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,401 psi | 77% | 2904 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,374 psi | 80% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,508 psi | 88% | 2874 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,899 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,898 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,697 psi | 88% | 2858 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,769 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,727 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,521 psi | 85% | 2959 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,363 psi | 86% | 2861 fps | 98.1% |
| Bofors RP15 | <<locked>> | 94% | 59,930 psi | 90% | 2936 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 58,552 psi | 88% | 2943 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 56,898 psi | 85% | 2894 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,697 psi | 88% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,449 psi | 85% | 2894 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,943 psi | 88% | 2877 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,843 psi | 90% | 2894 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,610 psi | 88% | 2874 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,682 psi | 88% | 2799 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,624 psi | 86% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,973 psi | 90% | 2917 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 56% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,188 psi | 86% | 2812 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,915 psi | 90% | 2841 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,711 psi | 87% | 2815 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 60,191 psi | 90% | 2871 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 92% | 58,914 psi | 88% | 2943 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,733 psi | 73% | 2805 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 57,464 psi | 86% | 2789 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 59,350 psi | 89% | 2838 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,479 psi | 88% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,494 psi | 88% | 2871 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 49,458 psi | 74% | 2831 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,043 psi | 86% | 2913 fps | 100% |
| Norma URP | <<locked>> | 84% | 59,277 psi | 89% | 2854 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 60,336 psi | 90% | 2966 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 58,334 psi | 87% | 2864 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,552 psi | 88% | 2894 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,377 psi | 58% | 1847 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,812 psi | 87% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,275 psi | 84% | 2874 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,668 psi | 88% | 3002 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,073 psi | 87% | 2969 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 59,016 psi | 88% | 2858 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 57,725 psi | 87% | 2871 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,697 psi | 88% | 2822 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,464 psi | 86% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 59,350 psi | 89% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 60,118 psi | 90% | 2795 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,319 psi | 86% | 2867 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,768 psi | 85% | 2795 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 56,942 psi | 85% | 2808 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,899 psi | 87% | 2838 fps | 100% |
| Unknown powder | <<locked>> | 82% | 59,335 psi | 89% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,246 psi | 86% | 2795 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,740 psi | 87% | 2822 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,913 psi | 85% | 2841 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 84% | 60,249 psi | 90% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,855 psi | 85% | 2835 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,579 psi | 85% | 2913 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 57,145 psi | 86% | 2900 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 58,494 psi | 88% | 2966 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,886 psi | 90% | 3031 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,739 psi | 85% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,943 psi | 88% | 2877 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,421 psi | 88% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,986 psi | 87% | 2838 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% | 40,712 psi | 61% | 2543 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 53,751 psi | 81% | 2772 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 42,627 psi | 64% | 2661 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 44,556 psi | 67% | 2661 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 40,030 psi | 60% | 2602 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 36,535 psi | 55% | 2520 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 98% | 47,747 psi | 72% | 2831 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 82% | 29,095 psi | 44% | 2365 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,256 psi | 77% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,643 psi | 67% | 2657 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,669 psi | 61% | 2612 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,334 psi | 59% | 2559 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,924 psi | 51% | 2490 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,222 psi | 66% | 2717 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 45,078 psi | 68% | 2759 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,427 psi | 71% | 2690 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 37,811 psi | 57% | 2549 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 36,172 psi | 54% | 2533 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 40,669 psi | 61% | 2612 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 54,998 psi | 82% | 2769 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 34,664 psi | 52% | 2477 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 54,998 psi | 82% | 2822 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,612 psi | 64% | 2605 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,901 psi | 63% | 2592 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,254 psi | 72% | 2654 fps | 100% |
| Hodgdon Retumbo | 63.3 gr | 80% | 33,127 psi | 50% | 2516 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 55,608 psi | 83% | 2854 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 42% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,270 psi | 75% | 2707 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 56,231 psi | 84% | 2789 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,763 psi | 76% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,758 psi | 66% | 2598 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 38,783 psi | 58% | 2585 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,606 psi | 52% | 2516 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 53,882 psi | 81% | 2740 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,373 psi | 79% | 2736 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,114 psi | 53% | 2421 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 50,966 psi | 76% | 2753 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 30,414 psi | 46% | 2425 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 42,946 psi | 64% | 2677 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 52,141 psi | 78% | 2753 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,566 psi | 58% | 2592 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 51,010 psi | 76% | 2756 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,621 psi | 52% | 2474 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,819 psi | 43% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,853 psi | 81% | 2792 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,301 psi | 78% | 2815 fps | 100% |
| ReloadSwiss RS 76 | 67.8 gr | 80% | 32,372 psi | 49% | 2493 fps | 97.1% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,682 psi | 59% | 2641 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 45,643 psi | 68% | 2641 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 44,121 psi | 66% | 2648 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 54,998 psi | 82% | 2769 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,882 psi | 81% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,373 psi | 79% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,736 psi | 79% | 2690 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,816 psi | 66% | 2641 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 46,543 psi | 70% | 2628 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 49,661 psi | 74% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,686 psi | 67% | 2628 fps | 99.3% |
| Unknown powder | <<locked>> | 80% | 55,535 psi | 83% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 53,592 psi | 80% | 2743 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,899 psi | 58% | 2503 fps | 98% |
| Vihtavuori N170 | <<locked>> | 94% | 53,069 psi | 80% | 2779 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 52,968 psi | 79% | 2749 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,918 psi | 66% | 2635 fps | 100% |
| Vihtavuori N560 | 65.7 gr | 80% | 42,757 psi | 64% | 2671 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 37,927 psi | 57% | 2549 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 40,959 psi | 61% | 2654 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 48,008 psi | 72% | 2831 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,939 psi | 79% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 55,201 psi | 83% | 2825 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,738 psi | 55% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,973 psi | 61% | 2556 fps | 98% |
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 73 powders for 7 mm STW loaded with the .284 | 165gr | Sierra Tipped GameKing. Vihtavuori N570 delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,031 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 165.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 165gr | Sierra Tipped GameKing 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.