Load Specifications
Load data in caliber 7 mm STW with .284 | 120gr | Nosler Ballistic Tip Hunting bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4350, Accurate MAGPRO and Alliant Reloder-26.
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% | 58,987 psi | 88% | 3219 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 59,959 psi | 90% | 3268 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,769 psi | 87% | 3307 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 60,336 psi | 90% | 3232 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,130 psi | 86% | 3258 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 58,914 psi | 88% | 3320 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,472 psi | 74% | 3127 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,106 psi | 66% | 3071 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,189 psi | 87% | 3202 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,768 psi | 85% | 3271 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 58,204 psi | 87% | 3284 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 60,249 psi | 90% | 3304 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 58,842 psi | 88% | 3314 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 59,944 psi | 90% | 3287 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,622 psi | 83% | 3284 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,058 psi | 86% | 3320 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,725 psi | 87% | 3291 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 59,408 psi | 89% | 3219 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,779 psi | 78% | 3205 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 58,842 psi | 88% | 3314 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 58,247 psi | 87% | 3209 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,607 psi | 82% | 3228 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 59,524 psi | 89% | 3238 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 57,696 psi | 86% | 3261 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 60,292 psi | 90% | 3278 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 58,697 psi | 88% | 3255 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,508 psi | 86% | 3232 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,058 psi | 86% | 3186 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,462 psi | 82% | 3346 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 58,929 psi | 88% | 3297 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 55% | 2103 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 59,727 psi | 90% | 3215 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 60,147 psi | 90% | 3245 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 59,785 psi | 90% | 3235 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 60,176 psi | 90% | 3255 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 59,422 psi | 89% | 3235 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 56,637 psi | 85% | 3291 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 60,133 psi | 90% | 3202 fps | 100% |
| Lovex S065 | <<locked>> | 86% | 56,840 psi | 85% | 3179 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 58,581 psi | 88% | 3225 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,144 psi | 84% | 3176 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,595 psi | 86% | 3245 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 59,001 psi | 88% | 3340 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 58,044 psi | 87% | 3245 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,479 psi | 86% | 3310 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 57,087 psi | 86% | 3245 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 56,333 psi | 84% | 3241 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,623 psi | 56% | 2149 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 59,001 psi | 88% | 3219 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,537 psi | 86% | 3271 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 60,147 psi | 90% | 3287 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 58,610 psi | 88% | 3317 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 55,970 psi | 84% | 3350 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 59,727 psi | 90% | 3215 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,175 psi | 87% | 3225 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 59,770 psi | 90% | 3291 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 58,247 psi | 87% | 3209 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,840 psi | 85% | 3179 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 60,133 psi | 90% | 3202 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 58,581 psi | 88% | 3225 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,479 psi | 86% | 3219 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 59,161 psi | 89% | 3081 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 60,104 psi | 90% | 3182 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 59,306 psi | 89% | 3287 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 59,103 psi | 89% | 3209 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 60,307 psi | 90% | 3212 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 58,755 psi | 88% | 3248 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,623 psi | 85% | 3202 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 56,927 psi | 85% | 3123 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 59,959 psi | 90% | 3238 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 60,234 psi | 90% | 3235 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 59,219 psi | 89% | 3241 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 58,262 psi | 87% | 3261 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 58,726 psi | 88% | 3330 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 58,842 psi | 88% | 3301 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 60,046 psi | 90% | 3189 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,928 psi | 87% | 3264 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 58,494 psi | 88% | 3373 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,681 psi | 85% | 3192 fps | 98.7% |
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% | 33,794 psi | 51% | 2720 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 45,339 psi | 68% | 3018 fps | 99.5% |
| Accurate MAGPRO | 80.3 gr | 90% | 50,067 psi | 75% | 3166 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 53,142 psi | 80% | 3120 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 43,381 psi | 65% | 2995 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 47,703 psi | 72% | 3110 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 46,108 psi | 69% | 3058 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 36,143 psi | 54% | 2867 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,505 psi | 82% | 3146 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,352 psi | 65% | 3028 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,401 psi | 76% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 43,424 psi | 65% | 2989 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,597 psi | 62% | 2982 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,314 psi | 48% | 2753 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 84% | 32,358 psi | 49% | 2766 fps | 95% |
| Alliant Reloder-26 | 72.1 gr | 80% | 35,563 psi | 53% | 2887 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 44,179 psi | 66% | 3035 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 55,535 psi | 83% | 3159 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 44,860 psi | 67% | 3068 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 41,597 psi | 62% | 2982 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 48,124 psi | 72% | 3028 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 94% | 44,135 psi | 66% | 3022 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 55,709 psi | 84% | 3179 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 47,152 psi | 71% | 3071 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 49,472 psi | 74% | 3087 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 51,068 psi | 77% | 3120 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 90% | 50,053 psi | 75% | 3100 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,828 psi | 61% | 2900 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 41,394 psi | 62% | 3058 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 46,891 psi | 70% | 3084 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 41% | 1886 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 55,883 psi | 84% | 3156 fps | 100% |
| IMR 4350 | 66.7 gr | 80% | 43,453 psi | 65% | 2943 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,414 psi | 74% | 3058 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 43,192 psi | 65% | 2959 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 49,037 psi | 74% | 3051 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 45,818 psi | 69% | 3084 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 56,492 psi | 85% | 3153 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 46,891 psi | 70% | 3002 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 45,397 psi | 68% | 2986 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 35,404 psi | 53% | 2762 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,642 psi | 65% | 2979 fps | 95.5% |
| Norma MRP | <<locked>> | 82% | 38,072 psi | 57% | 2923 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 44,498 psi | 67% | 3005 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 45,934 psi | 69% | 3094 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 43,453 psi | 65% | 2992 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 41,278 psi | 62% | 2956 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 42% | 1929 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 55,303 psi | 83% | 3159 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,534 psi | 80% | 3215 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,368 psi | 68% | 3035 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,685 psi | 65% | 3048 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 38,319 psi | 57% | 2959 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 52,359 psi | 78% | 3104 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 47,761 psi | 72% | 3038 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 42,583 psi | 64% | 2969 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 48,124 psi | 72% | 3028 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,891 psi | 70% | 3002 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 56,492 psi | 85% | 3153 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,397 psi | 68% | 2986 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,824 psi | 81% | 3159 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,330 psi | 78% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,122 psi | 69% | 2943 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,221 psi | 63% | 2963 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,982 psi | 78% | 3097 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,110 psi | 74% | 3018 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,321 psi | 62% | 2956 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 40,393 psi | 61% | 2887 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 49,951 psi | 75% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,919 psi | 69% | 3005 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 40,045 psi | 60% | 2867 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,455 psi | 68% | 3005 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 36,318 psi | 54% | 2841 fps | 98.2% |
| Vihtavuori N560 | <<locked>> | 90% | 50,908 psi | 76% | 3189 fps | 96% |
| Vihtavuori N565 | <<locked>> | 94% | 47,601 psi | 71% | 3097 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,237 psi | 68% | 2956 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,152 psi | 71% | 3071 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,877 psi | 43% | 2740 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 42,757 psi | 64% | 2933 fps | 95.5% |
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 86 powders for 7 mm STW loaded with the .284 | 120gr | Nosler Ballistic Tip Hunting. Winchester StaBALL HD delivers the highest muzzle velocity at 3,373 fps; across all powders the maximum-charge window runs from 2,103 fps to 3,373 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 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 1:12.0 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. IMR 4350, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for 7 mm STW with the .284 | 120gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N570 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.