Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Winchester FailSafe bullet and 70 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% | 57,885 psi | 87% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,392 psi | 88% | 2877 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,797 psi | 85% | 2956 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 59,306 psi | 89% | 2943 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,551 psi | 86% | 2956 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 60,075 psi | 90% | 2986 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,431 psi | 79% | 2959 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,650 psi | 82% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,582 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,827 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,928 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 59,611 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,915 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,550 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,001 psi | 87% | 3015 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,363 psi | 87% | 2913 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 57,334 psi | 86% | 2940 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 59,770 psi | 90% | 2999 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 57,928 psi | 87% | 2949 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,466 psi | 89% | 2874 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,696 psi | 86% | 2949 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 59,828 psi | 90% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,971 psi | 85% | 2894 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,582 psi | 89% | 2930 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,640 psi | 89% | 2851 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 59,045 psi | 89% | 3071 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 56% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,030 psi | 87% | 2864 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,653 psi | 88% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,276 psi | 86% | 2871 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 59,901 psi | 90% | 2999 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,879 psi | 75% | 2861 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 58,218 psi | 87% | 2841 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 60,234 psi | 90% | 2894 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,582 psi | 89% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,466 psi | 89% | 2927 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,894 psi | 76% | 2887 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,088 psi | 87% | 2966 fps | 100% |
| Norma URP | <<locked>> | 84% | 60,249 psi | 90% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,101 psi | 86% | 2959 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 59,321 psi | 89% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 60,002 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,566 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,610 psi | 88% | 2897 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,290 psi | 86% | 2927 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 60,263 psi | 90% | 3061 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,669 psi | 89% | 3028 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 59,944 psi | 90% | 2913 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 58,682 psi | 88% | 2927 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,466 psi | 89% | 2874 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,218 psi | 87% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 60,234 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,217 psi | 86% | 2799 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,276 psi | 87% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,827 psi | 87% | 2851 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 57,957 psi | 87% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,001 psi | 88% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,001 psi | 87% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,885 psi | 88% | 2877 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,073 psi | 87% | 2894 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,377 psi | 86% | 2854 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,914 psi | 87% | 2887 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,566 psi | 86% | 2969 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 58,349 psi | 87% | 2956 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 59,988 psi | 90% | 3025 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 57,072 psi | 86% | 3022 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,551 psi | 86% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 59,828 psi | 90% | 2933 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 59,799 psi | 90% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,885 psi | 88% | 2890 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% | 41,423 psi | 62% | 2589 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 54,650 psi | 82% | 2825 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,815 psi | 64% | 2703 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 45,339 psi | 68% | 2717 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,698 psi | 61% | 2651 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 37,130 psi | 56% | 2569 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 48,805 psi | 73% | 2890 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 29,689 psi | 45% | 2415 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,243 psi | 78% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,397 psi | 68% | 2710 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,408 psi | 62% | 2661 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,190 psi | 60% | 2608 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,606 psi | 52% | 2536 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,237 psi | 68% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,180 psi | 69% | 2812 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,237 psi | 68% | 2684 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 38,537 psi | 58% | 2598 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 36,927 psi | 55% | 2582 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,408 psi | 62% | 2661 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 55,825 psi | 84% | 2825 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,346 psi | 53% | 2526 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 55,956 psi | 84% | 2877 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,294 psi | 65% | 2654 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,554 psi | 64% | 2638 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,994 psi | 73% | 2703 fps | 100% |
| Hodgdon Retumbo | 65.7 gr | 80% | 33,750 psi | 51% | 2562 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 42% | 1650 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,010 psi | 76% | 2759 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,401 psi | 77% | 2762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,440 psi | 67% | 2651 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,465 psi | 59% | 2635 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,375 psi | 53% | 2562 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 54,723 psi | 82% | 2792 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,185 psi | 80% | 2792 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,621 psi | 53% | 2467 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 51,837 psi | 78% | 2808 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,067 psi | 47% | 2470 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 43,772 psi | 66% | 2730 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 52,997 psi | 79% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,204 psi | 59% | 2638 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 51,880 psi | 78% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,302 psi | 53% | 2520 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 43% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,766 psi | 82% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,156 psi | 80% | 2867 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 32,953 psi | 49% | 2536 fps | 97.1% |
| ReloadSwiss RS 80 | 78 gr | 88% | 40,625 psi | 61% | 2690 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,398 psi | 70% | 2694 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 44,918 psi | 67% | 2700 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 55,825 psi | 84% | 2825 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,723 psi | 82% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,185 psi | 80% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,476 psi | 80% | 2746 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,599 psi | 67% | 2694 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 47,195 psi | 71% | 2677 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 50,560 psi | 76% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,397 psi | 68% | 2677 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 54,418 psi | 82% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,595 psi | 59% | 2556 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 54,273 psi | 81% | 2835 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 53,693 psi | 80% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,628 psi | 67% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,555 psi | 65% | 2720 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 38,711 psi | 58% | 2598 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 41,800 psi | 63% | 2707 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 49,371 psi | 74% | 2890 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,650 psi | 80% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,173 psi | 84% | 2881 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,782 psi | 57% | 2654 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,771 psi | 63% | 2608 fps | 98.1% |
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 70 powders for 7 mm STW loaded with the .284 | 160gr | Winchester FailSafe. Hodgdon Retumbo delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,071 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 1:11.5 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 160gr | Winchester FailSafe 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.