Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Speer Deep Curl 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% | 58,943 psi | 88% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 59,393 psi | 89% | 2894 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,798 psi | 87% | 2976 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 60,147 psi | 90% | 2956 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 58,624 psi | 88% | 2972 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 57,029 psi | 85% | 2943 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,606 psi | 80% | 2982 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,651 psi | 83% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 60,350 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 59,611 psi | 89% | 2946 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,972 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,956 psi | 85% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,130 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,696 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 59,379 psi | 89% | 3035 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 59,205 psi | 89% | 2930 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 58,131 psi | 87% | 2953 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 56,985 psi | 85% | 2959 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 58,972 psi | 88% | 2966 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 60,075 psi | 90% | 2887 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 58,682 psi | 88% | 2966 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,740 psi | 87% | 2907 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,594 psi | 85% | 2890 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 60,307 psi | 90% | 2861 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 60,191 psi | 90% | 3084 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 56% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,595 psi | 88% | 2877 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 59,538 psi | 89% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,015 psi | 87% | 2884 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 56,869 psi | 85% | 2953 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,068 psi | 77% | 2881 fps | 99.3% |
| Lovex S065 | <<locked>> | 82% | 58,856 psi | 88% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,261 psi | 86% | 2854 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,855 psi | 85% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 84% | 60,292 psi | 90% | 2940 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 51,924 psi | 78% | 2904 fps | 100% |
| Norma MRP | <<locked>> | 88% | 59,205 psi | 89% | 2982 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,232 psi | 86% | 2867 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 58,276 psi | 87% | 2979 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 60,162 psi | 90% | 2933 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,695 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,624 psi | 58% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 59,524 psi | 89% | 2913 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 58,204 psi | 87% | 2940 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,971 psi | 85% | 3015 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,405 psi | 85% | 2976 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 86% | 57,029 psi | 85% | 2874 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 59,538 psi | 89% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 60,075 psi | 90% | 2887 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,856 psi | 88% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,261 psi | 86% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,783 psi | 87% | 2808 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 59,132 psi | 89% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 58,494 psi | 88% | 2861 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 58,682 psi | 88% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,770 psi | 90% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,900 psi | 88% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,640 psi | 89% | 2890 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,856 psi | 88% | 2910 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 82% | 58,001 psi | 87% | 2864 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,842 psi | 88% | 2904 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 58,566 psi | 88% | 2986 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 59,379 psi | 89% | 2972 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 96% | 56,840 psi | 85% | 2979 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 98% | 58,073 psi | 87% | 3038 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 58,320 psi | 87% | 2808 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,768 psi | 85% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,886 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% | 42,076 psi | 63% | 2602 fps | 99.7% |
| Accurate 4350 | <<locked>> | 80% | 55,405 psi | 83% | 2838 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,584 psi | 65% | 2723 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 45,992 psi | 69% | 2726 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 41,307 psi | 62% | 2667 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 84% | 35,360 psi | 53% | 2526 fps | 95% |
| ADI AR 2218 | <<locked>> | 98% | 49,734 psi | 75% | 2907 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 82% | 30,139 psi | 45% | 2428 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,968 psi | 79% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,992 psi | 69% | 2723 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,003 psi | 63% | 2674 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,872 psi | 61% | 2625 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,172 psi | 53% | 2552 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,137 psi | 69% | 2782 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 47,282 psi | 71% | 2831 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,774 psi | 69% | 2697 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 39,160 psi | 59% | 2612 fps | 97.3% |
| Bofors RP30 | <<locked>> | 82% | 35,215 psi | 53% | 2539 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 42,003 psi | 63% | 2674 fps | 98.2% |
| Bofors RP7 | <<locked>> | 80% | 56,478 psi | 85% | 2835 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,853 psi | 54% | 2539 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 43,859 psi | 66% | 2667 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,149 psi | 65% | 2651 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,690 psi | 74% | 2713 fps | 100% |
| Hodgdon Retumbo | 66.7 gr | 80% | 34,476 psi | 52% | 2585 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 42% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,619 psi | 77% | 2769 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 52,286 psi | 78% | 2779 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,976 psi | 67% | 2661 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 40,074 psi | 60% | 2648 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,216 psi | 54% | 2582 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 55,361 psi | 83% | 2805 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,838 psi | 81% | 2802 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,260 psi | 54% | 2480 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 52,678 psi | 79% | 2825 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 31,763 psi | 48% | 2487 fps | 96% |
| Norma MRP | <<locked>> | 80% | 44,628 psi | 67% | 2746 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 53,693 psi | 80% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,987 psi | 60% | 2657 fps | 97% |
| Ramshot Hunter | <<locked>> | 80% | 52,707 psi | 79% | 2825 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,013 psi | 54% | 2536 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 43% | 1699 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 55,680 psi | 83% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 54,056 psi | 81% | 2881 fps | 100% |
| ReloadSwiss RS 76 | 71.3 gr | 80% | 33,591 psi | 50% | 2556 fps | 97.5% |
| ReloadSwiss RS 80 | 79.1 gr | 88% | 41,539 psi | 62% | 2707 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 47,007 psi | 70% | 2707 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 45,585 psi | 68% | 2713 fps | 99% |
| Rottweil R 907 | <<locked>> | 80% | 56,478 psi | 85% | 2835 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,361 psi | 83% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,838 psi | 81% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,085 psi | 81% | 2756 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,237 psi | 68% | 2707 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 47,892 psi | 72% | 2690 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 51,300 psi | 77% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,977 psi | 69% | 2687 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 55,085 psi | 83% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,190 psi | 60% | 2566 fps | 98.3% |
| Vihtavuori N170 | <<locked>> | 92% | 51,547 psi | 77% | 2792 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 54,317 psi | 81% | 2812 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,339 psi | 68% | 2697 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,367 psi | 67% | 2740 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 36,782 psi | 55% | 2556 fps | 95% |
| Vihtavuori N568 | <<locked>> | 88% | 42,714 psi | 64% | 2723 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 94% | 50,357 psi | 75% | 2907 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,433 psi | 82% | 2756 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,740 psi | 58% | 2674 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,351 psi | 63% | 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 Deep Curl Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,084 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 Deep Curl 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.