Load Specifications
Load data in caliber 7 mm STW with .284 | 120gr | Nosler FN bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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>> | 96% | 60,191 psi | 90% | 3235 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,029 psi | 85% | 3222 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 57,783 psi | 87% | 3330 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 94% | 59,146 psi | 89% | 3333 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 57,363 psi | 86% | 3189 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,073 psi | 87% | 3274 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 60,060 psi | 90% | 3337 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,444 psi | 76% | 3150 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,150 psi | 68% | 3097 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 58,233 psi | 87% | 3271 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 59,103 psi | 89% | 3215 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,957 psi | 87% | 3287 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 59,350 psi | 89% | 3297 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,508 psi | 86% | 3258 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 60,046 psi | 90% | 3330 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,174 psi | 86% | 3245 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,058 psi | 86% | 3304 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,363 psi | 87% | 3337 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 58,871 psi | 88% | 3310 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,866 psi | 79% | 3222 fps | 97.7% |
| Bofors RP5 | <<locked>> | 96% | 60,046 psi | 90% | 3330 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 59,045 psi | 89% | 3225 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,883 psi | 84% | 3255 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 86% | 58,726 psi | 88% | 3278 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 57,479 psi | 86% | 3232 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 59,828 psi | 90% | 3271 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 58,610 psi | 88% | 3251 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,160 psi | 87% | 3199 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,825 psi | 84% | 3369 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 60,162 psi | 90% | 3317 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 55% | 2106 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,305 psi | 86% | 3205 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,811 psi | 85% | 3189 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 57,334 psi | 86% | 3212 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,724 psi | 85% | 3192 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 96% | 57,812 psi | 87% | 3310 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 57,609 psi | 86% | 3189 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 59,596 psi | 89% | 3241 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,305 psi | 86% | 3192 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 58,813 psi | 88% | 3264 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 40,625 psi | 61% | 3005 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 60,278 psi | 90% | 3356 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 59,103 psi | 89% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 58,943 psi | 88% | 3333 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 58,262 psi | 87% | 3264 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 57,725 psi | 87% | 3261 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,753 psi | 57% | 2156 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 59,988 psi | 90% | 3235 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 58,769 psi | 88% | 3287 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,276 psi | 86% | 3241 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 59,944 psi | 90% | 3337 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,261 psi | 86% | 3369 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 56,724 psi | 85% | 3173 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 59,117 psi | 89% | 3241 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 57,043 psi | 86% | 3248 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 59,045 psi | 89% | 3225 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,609 psi | 86% | 3189 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 59,596 psi | 89% | 3241 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 58,537 psi | 88% | 3235 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 59,973 psi | 90% | 3094 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,145 psi | 86% | 3140 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,594 psi | 85% | 3245 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 59,959 psi | 90% | 3222 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,290 psi | 86% | 3166 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 59,930 psi | 90% | 3261 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,754 psi | 87% | 3222 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 57,725 psi | 87% | 3136 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,130 psi | 86% | 3196 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,319 psi | 86% | 3192 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 60,176 psi | 90% | 3255 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 59,596 psi | 89% | 3278 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 59,872 psi | 90% | 3350 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 60,205 psi | 90% | 3323 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,087 psi | 86% | 3146 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,958 psi | 88% | 3281 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 60,263 psi | 90% | 3389 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 58,001 psi | 87% | 3215 fps | 98.9% |
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% | 34,548 psi | 52% | 2740 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 46,267 psi | 69% | 3035 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 46,644 psi | 70% | 3117 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 90% | 50,981 psi | 76% | 3182 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 54,012 psi | 81% | 3133 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 44,150 psi | 66% | 3012 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 90% | 48,588 psi | 73% | 3130 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 98% | 47,021 psi | 70% | 3081 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 36,912 psi | 55% | 2890 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,684 psi | 62% | 2949 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 55,390 psi | 83% | 3159 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,077 psi | 66% | 3041 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,314 psi | 77% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 41,278 psi | 62% | 2940 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 42,496 psi | 64% | 2999 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,025 psi | 50% | 2769 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 32,967 psi | 49% | 2782 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,492 psi | 55% | 2910 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 42,105 psi | 63% | 2986 fps | 95.3% |
| Bofors RP30 | <<locked>> | 96% | 45,977 psi | 69% | 3091 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 42,496 psi | 64% | 2999 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 48,747 psi | 73% | 3041 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 45,020 psi | 67% | 3041 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 47,950 psi | 72% | 3084 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 50,285 psi | 75% | 3104 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 88% | 48,530 psi | 73% | 3071 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 50,937 psi | 76% | 3117 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,684 psi | 62% | 2917 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 39,421 psi | 59% | 3002 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 47,848 psi | 72% | 3104 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,659 psi | 41% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,208 psi | 66% | 2959 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,169 psi | 75% | 3074 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 43,845 psi | 66% | 2972 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 49,879 psi | 75% | 3068 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 46,673 psi | 70% | 3100 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 47,703 psi | 72% | 3015 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 45,977 psi | 69% | 2999 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 33,823 psi | 51% | 2720 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 44,382 psi | 67% | 2995 fps | 95.8% |
| Norma 217 | <<locked>> | 98% | 37,985 psi | 57% | 2940 fps | 95.3% |
| Norma MRP | 72.9 gr | 82% | 38,798 psi | 58% | 2940 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 45,165 psi | 68% | 3018 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 47,007 psi | 70% | 3117 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 44,222 psi | 66% | 3005 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 88% | 39,175 psi | 59% | 2907 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 42% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 56,086 psi | 84% | 3173 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 54,578 psi | 82% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,412 psi | 70% | 3054 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,498 psi | 67% | 3064 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 36,434 psi | 55% | 2907 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 53,069 psi | 80% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 45,527 psi | 68% | 2992 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 43,526 psi | 65% | 2992 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 48,747 psi | 73% | 3041 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,703 psi | 72% | 3015 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 45,977 psi | 69% | 2999 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,650 psi | 82% | 3173 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,997 psi | 79% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,702 psi | 70% | 2956 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 43,163 psi | 65% | 2986 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,852 psi | 79% | 3114 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 50,053 psi | 75% | 3041 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 42,250 psi | 63% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,450 psi | 58% | 2841 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,604 psi | 76% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,717 psi | 70% | 3018 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 40,901 psi | 61% | 2887 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 46,224 psi | 69% | 3018 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 37,144 psi | 56% | 2861 fps | 98.4% |
| Vihtavuori N560 | 78.3 gr | 88% | 48,428 psi | 73% | 3140 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 48,675 psi | 73% | 3117 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,137 psi | 69% | 2972 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,950 psi | 72% | 3084 fps | 98.4% |
| Winchester StaBALL HD | 70.4 gr | 80% | 29,486 psi | 44% | 2762 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 43,613 psi | 65% | 2953 fps | 95.9% |
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 77 powders for 7 mm STW loaded with the .284 | 120gr | Nosler FN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,389 fps; across all powders the maximum-charge window runs from 2,106 fps to 3,389 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 120gr | Nosler FN 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.