Load Specifications
Load data in caliber 7 mm STW with .284 | 145gr | Hasler Hunting bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD 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>> | 94% | 59,146 psi | 89% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 60,205 psi | 90% | 3031 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,334 psi | 87% | 3100 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 82% | 60,176 psi | 90% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,392 psi | 86% | 3038 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 59,538 psi | 89% | 3107 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,447 psi | 80% | 3002 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,877 psi | 72% | 2956 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,508 psi | 86% | 3038 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,668 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,855 psi | 85% | 3025 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,567 psi | 89% | 3097 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,971 psi | 85% | 3005 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,666 psi | 85% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,914 psi | 87% | 3097 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,898 psi | 85% | 3002 fps | 96.9% |
| Bofors RP15 | <<locked>> | 96% | 58,392 psi | 88% | 3081 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,492 psi | 85% | 3071 fps | 99.4% |
| Bofors RP5 | <<locked>> | 94% | 59,567 psi | 89% | 3097 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 58,030 psi | 87% | 2979 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,364 psi | 89% | 3097 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 57,885 psi | 87% | 3031 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,666 psi | 85% | 2992 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 58,943 psi | 88% | 3038 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,696 psi | 86% | 3018 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,624 psi | 86% | 2953 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,654 psi | 89% | 3209 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,987 psi | 88% | 3071 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 56% | 1923 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,191 psi | 90% | 3018 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,480 psi | 89% | 3002 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 60,336 psi | 90% | 3018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,480 psi | 89% | 3018 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 57,406 psi | 86% | 3084 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,207 psi | 65% | 2851 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 56,666 psi | 85% | 2946 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,494 psi | 88% | 2992 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,681 psi | 85% | 2963 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,653 psi | 86% | 3022 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 43,671 psi | 65% | 2877 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 59,756 psi | 90% | 3120 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,262 psi | 87% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,523 psi | 88% | 3107 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 57,276 psi | 86% | 3018 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,087 psi | 86% | 3031 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 57% | 1965 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,420 psi | 85% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,234 psi | 89% | 3084 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,768 psi | 85% | 3140 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,159 psi | 84% | 3094 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 82% | 59,524 psi | 89% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,334 psi | 87% | 3009 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 56,275 psi | 84% | 3012 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 58,030 psi | 87% | 2979 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,666 psi | 85% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,494 psi | 88% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,798 psi | 88% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,553 psi | 89% | 2949 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 60,002 psi | 90% | 3071 fps | 99.9% |
| Somchem S355 | <<locked>> | 82% | 59,001 psi | 88% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 60,234 psi | 90% | 2999 fps | 99% |
| Somchem S365 | <<locked>> | 88% | 59,350 psi | 89% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,811 psi | 85% | 2982 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,652 psi | 85% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,205 psi | 90% | 3005 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,550 psi | 85% | 2966 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 59,335 psi | 89% | 3009 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,987 psi | 88% | 3035 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,350 psi | 89% | 3120 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 98% | 59,321 psi | 89% | 3091 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,521 psi | 85% | 3091 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 60,176 psi | 90% | 2956 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,088 psi | 87% | 3035 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 60,336 psi | 90% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,913 psi | 85% | 2982 fps | 99.6% |
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% | 36,274 psi | 54% | 2592 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 48,689 psi | 73% | 2858 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 43,526 psi | 65% | 2831 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 56,463 psi | 85% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,712 psi | 61% | 2733 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 41,756 psi | 63% | 2782 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 92% | 40,408 psi | 61% | 2746 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 31,778 psi | 48% | 2572 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,775 psi | 70% | 2867 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,578 psi | 82% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,654 psi | 61% | 2726 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,434 psi | 55% | 2657 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,099 psi | 53% | 2621 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,371 psi | 46% | 2526 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,146 psi | 59% | 2769 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,082 psi | 75% | 2881 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 36,289 psi | 54% | 2654 fps | 95% |
| Bofors RP30 | <<locked>> | 90% | 39,668 psi | 59% | 2753 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 36,434 psi | 55% | 2657 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 50,981 psi | 76% | 2864 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 38,566 psi | 58% | 2703 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,502 psi | 76% | 2913 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,910 psi | 79% | 2930 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 44,541 psi | 67% | 2789 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,772 psi | 66% | 2772 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,005 psi | 66% | 2746 fps | 100% |
| Hodgdon Retumbo | 69.9 gr | 86% | 36,405 psi | 55% | 2740 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 50,676 psi | 76% | 2940 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 42% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,528 psi | 70% | 2795 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,373 psi | 79% | 2890 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 46,267 psi | 69% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,105 psi | 65% | 2730 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 40,089 psi | 60% | 2756 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,408 psi | 61% | 2789 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,850 psi | 75% | 2835 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,182 psi | 72% | 2825 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 31,053 psi | 47% | 2461 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 46,789 psi | 70% | 2835 fps | 98.1% |
| Norma 217 | <<locked>> | 94% | 35,172 psi | 53% | 2687 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 38,363 psi | 57% | 2730 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 47,703 psi | 72% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,958 psi | 60% | 2762 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 46,673 psi | 70% | 2841 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 84% | 35,650 psi | 53% | 2635 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 42% | 1762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,965 psi | 73% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,311 psi | 71% | 2900 fps | 100% |
| ReloadSwiss RS 76 | 73.1 gr | 84% | 33,228 psi | 50% | 2644 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,077 psi | 66% | 2874 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 55,709 psi | 84% | 2920 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,872 psi | 63% | 2713 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 39,943 psi | 60% | 2710 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 50,981 psi | 76% | 2864 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,850 psi | 75% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,182 psi | 72% | 2825 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,317 psi | 83% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,936 psi | 73% | 2785 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,610 psi | 59% | 2703 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 55,332 psi | 83% | 2913 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,641 psi | 64% | 2697 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 45,005 psi | 67% | 2799 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,451 psi | 61% | 2690 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,055 psi | 80% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,153 psi | 74% | 2841 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,070 psi | 53% | 2559 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 48,486 psi | 73% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,160 psi | 59% | 2700 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 82% | 41,394 psi | 62% | 2785 fps | 95% |
| Vihtavuori N565 | <<locked>> | 88% | 41,727 psi | 63% | 2776 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 94% | 45,382 psi | 68% | 2890 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,515 psi | 73% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,734 psi | 76% | 2917 fps | 99.7% |
| Winchester StaBALL HD | 66.8 gr | 80% | 31,560 psi | 47% | 2638 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,115 psi | 56% | 2615 fps | 95.6% |
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 80 powders for 7 mm STW loaded with the .284 | 145gr | Hasler Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,209 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 145.0 gr projectile in 0.284" calls for a 1:10.0 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 145gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.