Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | SUS-TAC HP 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% | 60,060 psi | 90% | 3048 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,797 psi | 85% | 3025 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,943 psi | 88% | 3150 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 57,754 psi | 87% | 3084 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 59,756 psi | 90% | 3150 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,925 psi | 81% | 3048 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,443 psi | 73% | 3002 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,914 psi | 87% | 3081 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,711 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,900 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,232 psi | 86% | 3071 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,930 psi | 90% | 3143 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,406 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,188 psi | 86% | 3117 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,334 psi | 87% | 3146 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,203 psi | 86% | 3045 fps | 96.6% |
| Bofors RP15 | <<locked>> | 96% | 59,030 psi | 88% | 3130 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,087 psi | 86% | 3120 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 59,930 psi | 90% | 3143 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 58,421 psi | 88% | 3025 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,727 psi | 90% | 3136 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 58,349 psi | 87% | 3081 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,942 psi | 85% | 3035 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 59,234 psi | 89% | 3081 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,262 psi | 87% | 3068 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,928 psi | 87% | 3002 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 60,046 psi | 90% | 3258 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,582 psi | 89% | 3120 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 56% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,710 psi | 85% | 3009 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,944 psi | 90% | 3048 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,159 psi | 86% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,770 psi | 90% | 3064 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 57,667 psi | 86% | 3127 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,932 psi | 66% | 2900 fps | 96.7% |
| Lovex S065 | <<locked>> | 84% | 57,116 psi | 86% | 2992 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,117 psi | 89% | 3041 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,392 psi | 86% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,044 psi | 87% | 3064 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,237 psi | 66% | 2927 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 60,104 psi | 90% | 3166 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,827 psi | 88% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,726 psi | 88% | 3150 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 57,740 psi | 87% | 3064 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,537 psi | 86% | 3077 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 57% | 2001 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,043 psi | 86% | 3045 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,553 psi | 89% | 3133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,188 psi | 86% | 3186 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,579 psi | 85% | 3136 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 82% | 60,089 psi | 90% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,711 psi | 88% | 3054 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 56,724 psi | 85% | 3058 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 58,421 psi | 88% | 3025 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,116 psi | 86% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,117 psi | 89% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,176 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 60,162 psi | 90% | 2999 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,362 psi | 84% | 3054 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 59,509 psi | 89% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,724 psi | 85% | 2982 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 59,915 psi | 90% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,363 psi | 86% | 3031 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 57,130 psi | 86% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,739 psi | 85% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,188 psi | 86% | 3012 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 59,872 psi | 90% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,625 psi | 89% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,669 psi | 89% | 3163 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 59,988 psi | 90% | 3140 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,232 psi | 86% | 3140 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,362 psi | 84% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,595 psi | 88% | 3081 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,362 psi | 84% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,508 psi | 86% | 3028 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% | 37,130 psi | 56% | 2644 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 49,458 psi | 74% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 47,558 psi | 71% | 2949 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 41,162 psi | 62% | 2779 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 42,134 psi | 63% | 2828 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 40,944 psi | 61% | 2789 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 88% | 32,460 psi | 49% | 2621 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,524 psi | 62% | 2776 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,195 psi | 71% | 2917 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,911 psi | 82% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,147 psi | 62% | 2769 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,014 psi | 55% | 2707 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,723 psi | 54% | 2671 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,009 psi | 46% | 2575 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,711 psi | 60% | 2818 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,577 psi | 80% | 2979 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 39,421 psi | 59% | 2762 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 40,321 psi | 60% | 2805 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 37,014 psi | 55% | 2707 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 51,459 psi | 77% | 2913 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 39,131 psi | 59% | 2749 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,952 psi | 76% | 2959 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 53,229 psi | 80% | 2976 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 45,092 psi | 68% | 2835 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,164 psi | 66% | 2815 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,541 psi | 67% | 2795 fps | 100% |
| Hodgdon Retumbo | 70.7 gr | 86% | 37,043 psi | 56% | 2789 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 51,140 psi | 77% | 2986 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 42% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,978 psi | 70% | 2841 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,736 psi | 79% | 2936 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 46,876 psi | 70% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,540 psi | 65% | 2772 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 40,698 psi | 61% | 2802 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,002 psi | 61% | 2835 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,430 psi | 76% | 2887 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,805 psi | 73% | 2874 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 31,995 psi | 48% | 2516 fps | 96% |
| Norma 204 | <<locked>> | 80% | 47,384 psi | 71% | 2884 fps | 98% |
| Norma 217 | <<locked>> | 92% | 33,533 psi | 50% | 2674 fps | 95% |
| Norma MRP | <<locked>> | 80% | 39,088 psi | 59% | 2782 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 48,225 psi | 72% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,553 psi | 61% | 2812 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,268 psi | 71% | 2890 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 36,332 psi | 54% | 2684 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,705 psi | 75% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,863 psi | 72% | 2949 fps | 100% |
| ReloadSwiss RS 76 | 73.9 gr | 84% | 33,910 psi | 51% | 2690 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,744 psi | 67% | 2923 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 56,333 psi | 84% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,351 psi | 63% | 2756 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 40,524 psi | 61% | 2756 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 51,459 psi | 77% | 2913 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,430 psi | 76% | 2887 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,805 psi | 73% | 2874 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,738 psi | 84% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,458 psi | 74% | 2831 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,190 psi | 60% | 2753 fps | 96.4% |
| Somchem S355 | <<locked>> | 80% | 55,883 psi | 84% | 2963 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,250 psi | 65% | 2743 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 45,571 psi | 68% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,089 psi | 62% | 2740 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,577 psi | 80% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,647 psi | 74% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,650 psi | 53% | 2605 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,994 psi | 73% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,943 psi | 60% | 2753 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 45,092 psi | 68% | 2900 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 42,453 psi | 64% | 2825 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,847 psi | 69% | 2933 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,037 psi | 74% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,126 psi | 77% | 2963 fps | 99.6% |
| Winchester StaBALL HD | 67.6 gr | 80% | 32,343 psi | 48% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,637 psi | 56% | 2657 fps | 95.4% |
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 75 powders for 7 mm STW loaded with the .284 | 140gr | SUS-TAC HP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,258 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 140.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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 | 140gr | SUS-TAC HP 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.