Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Speer Magnum Tip Soft Point bullet and 68 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 ReloadSwiss RS 80.
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% | 59,001 psi | 88% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 59,437 psi | 89% | 2894 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 58,102 psi | 87% | 2979 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 86% | 56,434 psi | 85% | 2904 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 58,682 psi | 88% | 2972 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 57,305 psi | 86% | 2949 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,606 psi | 80% | 2982 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,869 psi | 84% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,623 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 59,872 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,987 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,029 psi | 85% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,188 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,754 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 59,669 psi | 89% | 3041 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 59,176 psi | 89% | 2930 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 58,189 psi | 87% | 2953 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 57,000 psi | 85% | 2956 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 58,987 psi | 88% | 2966 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 60,133 psi | 90% | 2887 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 58,972 psi | 88% | 2969 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,798 psi | 87% | 2907 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,623 psi | 85% | 2890 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,855 psi | 85% | 2815 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 60,234 psi | 90% | 3087 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 56% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,871 psi | 88% | 2881 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 59,567 psi | 89% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,247 psi | 87% | 2887 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 56,884 psi | 85% | 2953 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,111 psi | 77% | 2881 fps | 99.3% |
| Lovex S065 | <<locked>> | 82% | 58,885 psi | 88% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,290 psi | 86% | 2854 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,884 psi | 85% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 84% | 60,307 psi | 90% | 2940 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 52,228 psi | 78% | 2907 fps | 100% |
| Norma MRP | <<locked>> | 88% | 59,234 psi | 89% | 2982 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,276 psi | 86% | 2871 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 58,276 psi | 87% | 2976 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 60,176 psi | 90% | 2933 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,739 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,537 psi | 58% | 1893 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 59,596 psi | 89% | 2913 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 58,218 psi | 87% | 2940 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,276 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,695 psi | 85% | 2982 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 57,101 psi | 86% | 2874 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 59,553 psi | 89% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 60,133 psi | 90% | 2887 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,885 psi | 88% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,290 psi | 86% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,769 psi | 87% | 2808 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 59,190 psi | 89% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 58,523 psi | 88% | 2861 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 58,972 psi | 88% | 2874 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,799 psi | 90% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,987 psi | 88% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,901 psi | 90% | 2894 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 59,132 psi | 89% | 2913 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 82% | 58,276 psi | 87% | 2867 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,914 psi | 88% | 2904 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 58,624 psi | 88% | 2986 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 59,625 psi | 89% | 2976 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 57,101 psi | 86% | 2982 fps | 99% |
| Vihtavuori N570 | <<locked>> | 98% | 58,334 psi | 87% | 3041 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 58,566 psi | 88% | 2812 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,768 psi | 85% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,915 psi | 90% | 2907 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% | 42,119 psi | 63% | 2602 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 55,434 psi | 83% | 2838 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,656 psi | 65% | 2723 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 46,238 psi | 69% | 2733 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 41,350 psi | 62% | 2667 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 84% | 35,389 psi | 53% | 2526 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 49,937 psi | 75% | 2913 fps | 96.3% |
| ADI AR 2225 | <<locked>> | 82% | 30,168 psi | 45% | 2431 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,069 psi | 80% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,064 psi | 69% | 2723 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,061 psi | 63% | 2674 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,915 psi | 61% | 2625 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,375 psi | 53% | 2556 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,224 psi | 69% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 47,485 psi | 71% | 2835 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,818 psi | 69% | 2700 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 39,204 psi | 59% | 2612 fps | 97.4% |
| Bofors RP30 | <<locked>> | 82% | 35,288 psi | 53% | 2543 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 42,061 psi | 63% | 2674 fps | 98.2% |
| Bofors RP7 | <<locked>> | 80% | 56,507 psi | 85% | 2838 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,897 psi | 54% | 2543 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 44,063 psi | 66% | 2671 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,178 psi | 65% | 2654 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,763 psi | 75% | 2717 fps | 100% |
| Hodgdon Retumbo | 66.8 gr | 80% | 34,505 psi | 52% | 2585 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 42% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,866 psi | 78% | 2776 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 52,344 psi | 78% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,208 psi | 68% | 2664 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 80% | 40,147 psi | 60% | 2651 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,274 psi | 54% | 2582 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 55,434 psi | 83% | 2805 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,896 psi | 81% | 2805 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,303 psi | 54% | 2484 fps | 98.8% |
| Norma 204 | <<locked>> | 80% | 52,707 psi | 79% | 2825 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 31,807 psi | 48% | 2487 fps | 96% |
| Norma MRP | <<locked>> | 80% | 44,686 psi | 67% | 2746 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 53,780 psi | 81% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,059 psi | 60% | 2657 fps | 97% |
| Ramshot Hunter | <<locked>> | 80% | 52,779 psi | 79% | 2825 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,085 psi | 54% | 2536 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,935 psi | 43% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 55,709 psi | 84% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 54,114 psi | 81% | 2884 fps | 100% |
| ReloadSwiss RS 76 | 71.5 gr | 80% | 33,750 psi | 51% | 2559 fps | 97.6% |
| ReloadSwiss RS 80 | 79.2 gr | 88% | 41,553 psi | 62% | 2710 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 47,036 psi | 71% | 2707 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 45,629 psi | 68% | 2713 fps | 99% |
| Rottweil R 907 | <<locked>> | 80% | 56,507 psi | 85% | 2838 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,434 psi | 83% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,896 psi | 81% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,302 psi | 81% | 2759 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,281 psi | 68% | 2707 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 47,906 psi | 72% | 2694 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 51,576 psi | 77% | 2776 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,050 psi | 69% | 2690 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 55,172 psi | 83% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,219 psi | 60% | 2566 fps | 98.3% |
| Vihtavuori N170 | <<locked>> | 92% | 51,561 psi | 77% | 2792 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 54,578 psi | 82% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,382 psi | 68% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,411 psi | 67% | 2740 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 36,825 psi | 55% | 2556 fps | 95% |
| Vihtavuori N568 | <<locked>> | 88% | 42,743 psi | 64% | 2723 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 92% | 46,934 psi | 70% | 2841 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,665 psi | 82% | 2762 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,769 psi | 58% | 2674 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,395 psi | 64% | 2618 fps | 98.3% |
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 68 powders for 7 mm STW loaded with the .284 | 160gr | Speer Magnum Tip Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,087 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,087 fps. ADI AR 2218 gives the best case fill at 100 %, and 68 of the 68 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 160.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 160gr | Speer Magnum Tip Soft Point 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.