Load Specifications
Load data in caliber 7 mm STW with .284 | 170gr | Norma VULKAN bullet and 61 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 57,203 psi | 86% | 2772 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 60,321 psi | 90% | 2936 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 58,450 psi | 88% | 2858 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,898 psi | 85% | 2874 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 59,683 psi | 89% | 2907 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,840 psi | 84% | 2959 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,291 psi | 87% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,552 psi | 88% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,015 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,334 psi | 86% | 2867 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,030 psi | 88% | 2825 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 59,538 psi | 89% | 2897 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,057 psi | 84% | 2861 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,841 psi | 87% | 2943 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,214 psi | 80% | 2861 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,348 psi | 86% | 2835 fps | 98.5% |
| Bofors RP15 | <<locked>> | 90% | 56,521 psi | 85% | 2854 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 59,379 psi | 89% | 2920 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,334 psi | 86% | 2867 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,101 psi | 86% | 2871 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,886 psi | 90% | 2864 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,711 psi | 88% | 2848 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,755 psi | 88% | 2766 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,885 psi | 88% | 2989 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,695 psi | 56% | 1798 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,869 psi | 85% | 2776 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,595 psi | 86% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,886 psi | 90% | 2838 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 59,292 psi | 89% | 2913 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,461 psi | 80% | 2848 fps | 99.8% |
| Lovex S070 | <<locked>> | 82% | 59,016 psi | 88% | 2802 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,827 psi | 88% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,305 psi | 87% | 2838 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,578 psi | 82% | 2871 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,392 psi | 86% | 2881 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,132 psi | 89% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,449 psi | 85% | 2874 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 58,334 psi | 87% | 2831 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,205 psi | 89% | 2867 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 58% | 1844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,959 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 59,234 psi | 89% | 2946 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 58,929 psi | 88% | 2828 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,682 psi | 86% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,016 psi | 88% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,451 psi | 89% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,290 psi | 86% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,536 psi | 85% | 2762 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 57,101 psi | 86% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,001 psi | 87% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,131 psi | 87% | 2795 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,130 psi | 86% | 2815 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 82% | 59,901 psi | 90% | 2812 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 57,377 psi | 86% | 2805 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,797 psi | 85% | 2884 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 57,914 psi | 87% | 2877 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 59,683 psi | 89% | 2949 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 56,652 psi | 85% | 2943 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 60,321 psi | 90% | 2756 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 59,799 psi | 90% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,030 psi | 87% | 2808 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% | 43,714 psi | 66% | 2566 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,484 psi | 68% | 2690 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 47,848 psi | 72% | 2690 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 42,946 psi | 64% | 2631 fps | 97.9% |
| ADI AR 2217 | <<locked>> | 82% | 34,301 psi | 51% | 2438 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 44,889 psi | 67% | 2746 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 29,486 psi | 44% | 2352 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,868 psi | 82% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,645 psi | 71% | 2684 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,700 psi | 66% | 2638 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,569 psi | 64% | 2582 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,883 psi | 55% | 2526 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,370 psi | 73% | 2746 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 46,064 psi | 69% | 2743 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,716 psi | 69% | 2726 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,266 psi | 66% | 2605 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 40,756 psi | 61% | 2579 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 34,330 psi | 51% | 2457 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 43,700 psi | 66% | 2638 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 34,911 psi | 52% | 2457 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 45,643 psi | 68% | 2635 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,715 psi | 67% | 2618 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,634 psi | 77% | 2667 fps | 100% |
| Hodgdon Retumbo | 66.2 gr | 80% | 36,027 psi | 54% | 2562 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 43% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,461 psi | 80% | 2726 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,070 psi | 81% | 2730 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,601 psi | 70% | 2625 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 41,771 psi | 63% | 2615 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,433 psi | 53% | 2500 fps | 95.9% |
| Lovex S070 | <<locked>> | 80% | 55,492 psi | 83% | 2753 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,681 psi | 56% | 2448 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 54,491 psi | 82% | 2779 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 29,022 psi | 44% | 2349 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 46,557 psi | 70% | 2710 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 55,506 psi | 83% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,901 psi | 63% | 2628 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 54,592 psi | 82% | 2779 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,782 psi | 57% | 2510 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,080 psi | 44% | 1647 fps | 100% |
| ReloadSwiss RS 76 | 70.8 gr | 80% | 35,186 psi | 53% | 2536 fps | 98.7% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,565 psi | 56% | 2556 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 48,559 psi | 73% | 2664 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 47,297 psi | 71% | 2674 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 55,492 psi | 83% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,883 psi | 84% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,949 psi | 70% | 2671 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 49,516 psi | 74% | 2654 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 53,461 psi | 80% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,659 psi | 71% | 2648 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,684 psi | 62% | 2533 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 50,009 psi | 75% | 2700 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 56,318 psi | 84% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 47,123 psi | 71% | 2654 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,209 psi | 69% | 2703 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 38,421 psi | 58% | 2530 fps | 96.3% |
| Vihtavuori N568 | <<locked>> | 84% | 38,754 psi | 58% | 2575 fps | 95% |
| Vihtavuori N570 | 77.3 gr | 90% | 45,730 psi | 69% | 2753 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 56,318 psi | 84% | 2707 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,959 psi | 61% | 2638 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,961 psi | 66% | 2585 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 61 powders for 7 mm STW loaded with the .284 | 170gr | Norma VULKAN. Hodgdon Retumbo delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,798 fps to 2,989 fps. ADI AR 2218 gives the best case fill at 100 %, and 61 of the 61 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 170.0 gr projectile in 0.284" calls for a 1:12.0 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 170gr | Norma VULKAN 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.