Load Specifications
Load data in caliber 7 mm STW with .284 | 130gr | Sierra SP SSPistol bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, ReloadSwiss RS 76 and IMR 7828 SSC.
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% | 59,582 psi | 89% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 60,350 psi | 90% | 3173 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,378 psi | 88% | 3225 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 59,930 psi | 90% | 3123 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,363 psi | 86% | 3169 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 59,190 psi | 89% | 3232 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,606 psi | 80% | 3123 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,022 psi | 72% | 3074 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,261 psi | 86% | 3173 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,537 psi | 88% | 3182 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,855 psi | 85% | 3156 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,335 psi | 89% | 3225 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,840 psi | 85% | 3140 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,637 psi | 85% | 3199 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,827 psi | 87% | 3228 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,782 psi | 85% | 3120 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 58,450 psi | 88% | 3209 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,637 psi | 85% | 3199 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 59,335 psi | 89% | 3225 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 57,914 psi | 87% | 3110 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,205 psi | 89% | 3219 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 57,769 psi | 87% | 3163 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 60,104 psi | 90% | 3179 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 58,827 psi | 88% | 3163 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,653 psi | 86% | 3146 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,377 psi | 86% | 3087 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,480 psi | 89% | 3337 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,914 psi | 88% | 3199 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 56% | 2037 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,147 psi | 90% | 3153 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,379 psi | 89% | 3136 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 56,623 psi | 85% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,306 psi | 89% | 3143 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 57,116 psi | 86% | 3205 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 60,350 psi | 90% | 3133 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,668 psi | 88% | 3130 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,811 psi | 85% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,769 psi | 87% | 3153 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 43,859 psi | 66% | 2995 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 59,669 psi | 89% | 3251 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,349 psi | 87% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,421 psi | 88% | 3232 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 57,406 psi | 86% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,985 psi | 85% | 3156 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,956 psi | 57% | 2083 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,521 psi | 85% | 3133 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,987 psi | 88% | 3219 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,782 psi | 85% | 3264 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,231 psi | 84% | 3215 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 59,625 psi | 89% | 3114 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,204 psi | 87% | 3133 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 92% | 60,336 psi | 90% | 3205 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 57,914 psi | 87% | 3110 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,350 psi | 90% | 3133 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,668 psi | 88% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,827 psi | 88% | 2976 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,611 psi | 89% | 3084 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,886 psi | 90% | 3202 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 58,885 psi | 88% | 3104 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 60,220 psi | 90% | 3123 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 59,364 psi | 89% | 3153 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,898 psi | 85% | 3114 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 56,681 psi | 85% | 3022 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,118 psi | 90% | 3140 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,739 psi | 85% | 3094 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 59,393 psi | 89% | 3146 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,929 psi | 88% | 3166 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,234 psi | 89% | 3245 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 59,480 psi | 89% | 3219 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,695 psi | 85% | 3212 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,915 psi | 90% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,001 psi | 87% | 3169 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 60,017 psi | 90% | 3281 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,058 psi | 86% | 3107 fps | 99.3% |
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% | 36,811 psi | 55% | 2713 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 49,052 psi | 74% | 2992 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 47,050 psi | 71% | 3022 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 56,405 psi | 85% | 3071 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,698 psi | 61% | 2848 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 44,875 psi | 67% | 2966 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 94% | 43,453 psi | 65% | 2923 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 90% | 34,316 psi | 51% | 2743 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,731 psi | 70% | 2995 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,447 psi | 82% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,799 psi | 61% | 2844 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,276 psi | 59% | 2838 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,317 psi | 53% | 2740 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,632 psi | 46% | 2631 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,320 psi | 59% | 2887 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,272 psi | 80% | 3054 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 39,117 psi | 59% | 2831 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 42,859 psi | 64% | 2936 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 39,276 psi | 59% | 2838 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 51,039 psi | 77% | 2995 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 41,481 psi | 62% | 2881 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,444 psi | 76% | 3038 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 52,823 psi | 79% | 3058 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 47,805 psi | 72% | 2972 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,007 psi | 70% | 2956 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,976 psi | 66% | 2871 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 39,305 psi | 59% | 2923 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,821 psi | 76% | 3068 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 42% | 1827 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,470 psi | 70% | 2917 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,272 psi | 78% | 3018 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 46,383 psi | 70% | 2930 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,021 psi | 69% | 2907 fps | 95.6% |
| IMR 7828 SSC | 73.5 gr | 86% | 43,207 psi | 65% | 2940 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,980 psi | 75% | 2966 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,327 psi | 72% | 2953 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 31,604 psi | 47% | 2579 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 46,862 psi | 70% | 2956 fps | 97.3% |
| Norma 217 | <<locked>> | 94% | 35,578 psi | 53% | 2799 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 38,551 psi | 58% | 2848 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 47,732 psi | 72% | 2972 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 43,149 psi | 65% | 2946 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,775 psi | 70% | 2969 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 84% | 35,926 psi | 54% | 2746 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,485 psi | 43% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,037 psi | 74% | 3009 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,326 psi | 71% | 3028 fps | 99.9% |
| ReloadSwiss RS 76 | 78.7 gr | 86% | 36,100 psi | 54% | 2822 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 47,950 psi | 72% | 3064 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 55,782 psi | 84% | 3058 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 44,846 psi | 67% | 2894 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 40,030 psi | 60% | 2825 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,039 psi | 77% | 2995 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,980 psi | 75% | 2966 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,327 psi | 72% | 2953 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,303 psi | 83% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,965 psi | 73% | 2910 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,697 psi | 60% | 2818 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 55,448 psi | 83% | 3054 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 45,876 psi | 69% | 2874 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 45,020 psi | 67% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,712 psi | 61% | 2808 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,084 psi | 80% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,269 psi | 74% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 37,855 psi | 57% | 2733 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 48,559 psi | 73% | 2969 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,494 psi | 59% | 2822 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 84% | 44,628 psi | 67% | 2972 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 45,208 psi | 68% | 2963 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 49,023 psi | 73% | 3077 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,559 psi | 73% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,662 psi | 76% | 3045 fps | 99.3% |
| Winchester StaBALL HD | 70.3 gr | 80% | 31,749 psi | 48% | 2756 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,103 psi | 60% | 2792 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 74 powders for 7 mm STW loaded with the .284 | 130gr | Sierra SP SSPistol. Hodgdon Retumbo delivers the highest muzzle velocity at 3,337 fps; across all powders the maximum-charge window runs from 2,037 fps to 3,337 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 130.0 gr projectile in 0.284" calls for a 1:13.5 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. Winchester StaBALL HD, ReloadSwiss RS 76, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 130gr | Sierra SP SSPistol 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.