Load Specifications
Load data in caliber 7 mm STW with .284 | 120gr | Sierra Pro-Hunter bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Ramshot Grand.
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% | 57,769 psi | 87% | 3199 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,436 psi | 88% | 3245 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,536 psi | 85% | 3287 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 58,697 psi | 88% | 3209 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 59,495 psi | 89% | 3297 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 57,566 psi | 86% | 3297 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,909 psi | 78% | 3176 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,586 psi | 70% | 3127 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 60,278 psi | 90% | 3232 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,335 psi | 89% | 3304 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,811 psi | 85% | 3261 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,074 psi | 89% | 3284 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,725 psi | 87% | 3294 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,900 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,914 psi | 88% | 3330 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,854 psi | 84% | 3297 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 56,623 psi | 85% | 3271 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,607 psi | 82% | 3251 fps | 98.1% |
| Bofors RP5 | <<locked>> | 94% | 57,725 psi | 87% | 3294 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 56,536 psi | 85% | 3182 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,464 psi | 86% | 3281 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 60,220 psi | 90% | 3301 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 58,697 psi | 88% | 3255 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 57,363 psi | 86% | 3232 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 60,133 psi | 90% | 3278 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 59,727 psi | 90% | 3219 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,580 psi | 86% | 3399 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 84% | 57,363 psi | 86% | 3271 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 56% | 2119 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,653 psi | 88% | 3225 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,001 psi | 87% | 3212 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 58,827 psi | 88% | 3232 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,914 psi | 87% | 3215 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 59,437 psi | 89% | 3340 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 58,813 psi | 88% | 3209 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,072 psi | 86% | 3202 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,914 psi | 88% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 88% | 60,147 psi | 90% | 3284 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 42,134 psi | 63% | 3041 fps | 97.1% |
| Norma MRP | <<locked>> | 92% | 57,870 psi | 87% | 3317 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 56,608 psi | 85% | 3222 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,420 psi | 85% | 3291 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 59,654 psi | 89% | 3284 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 59,553 psi | 89% | 3287 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 57% | 2162 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,755 psi | 88% | 3264 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,188 psi | 86% | 3291 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,422 psi | 89% | 3402 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,128 psi | 81% | 3261 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 58,160 psi | 87% | 3196 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,623 psi | 85% | 3202 fps | 98% |
| Rottweil R 905 | <<locked>> | 92% | 58,653 psi | 88% | 3274 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 56,536 psi | 85% | 3182 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,813 psi | 88% | 3209 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,072 psi | 86% | 3202 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 59,872 psi | 90% | 3251 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,508 psi | 86% | 3061 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,233 psi | 87% | 3159 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,204 psi | 87% | 3271 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 57,551 psi | 86% | 3186 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,595 psi | 88% | 3189 fps | 97.7% |
| Somchem S365 | <<locked>> | 88% | 57,551 psi | 86% | 3228 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 59,059 psi | 89% | 3238 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 59,016 psi | 88% | 3153 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,392 psi | 88% | 3215 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,045 psi | 89% | 3219 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 57,856 psi | 87% | 3219 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,261 psi | 86% | 3245 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,522 psi | 86% | 3307 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 98% | 57,740 psi | 87% | 3281 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,868 psi | 82% | 3268 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,392 psi | 88% | 3163 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,478 psi | 85% | 3241 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,841 psi | 87% | 3350 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 59,480 psi | 89% | 3238 fps | 99.2% |
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% | 35,505 psi | 53% | 2762 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 47,427 psi | 71% | 3058 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 52,692 psi | 79% | 3219 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 55,071 psi | 83% | 3153 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 42,337 psi | 63% | 2972 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 88% | 46,601 psi | 70% | 3087 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 96% | 45,092 psi | 68% | 3041 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 38,058 psi | 57% | 2923 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 56,550 psi | 85% | 3176 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,237 psi | 68% | 3064 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,692 psi | 79% | 3196 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 42,380 psi | 64% | 2966 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,799 psi | 61% | 2959 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,011 psi | 51% | 2792 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,910 psi | 51% | 2808 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,666 psi | 56% | 2933 fps | 98.1% |
| Bofors RP15 | <<locked>> | 88% | 43,410 psi | 65% | 3015 fps | 95.8% |
| Bofors RP30 | <<locked>> | 94% | 44,266 psi | 66% | 3051 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 40,799 psi | 61% | 2959 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 49,719 psi | 75% | 3061 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 92% | 43,279 psi | 65% | 3002 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 49,023 psi | 73% | 3107 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 51,488 psi | 77% | 3127 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 49,777 psi | 75% | 3094 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 48,820 psi | 73% | 3077 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,627 psi | 64% | 2936 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 40,727 psi | 61% | 3041 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 49,226 psi | 74% | 3127 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 42% | 1903 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,165 psi | 68% | 2979 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,155 psi | 77% | 3094 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 45,107 psi | 68% | 2995 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 47,761 psi | 72% | 3028 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 48,167 psi | 72% | 3130 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 48,733 psi | 73% | 3038 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 47,166 psi | 71% | 3022 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 34,795 psi | 52% | 2743 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 45,513 psi | 68% | 3018 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 39,291 psi | 59% | 2969 fps | 96% |
| Norma MRP | 72.7 gr | 80% | 37,130 psi | 56% | 2897 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 46,456 psi | 70% | 3045 fps | 99.7% |
| Ramshot Grand | 79.4 gr | 88% | 45,005 psi | 67% | 3071 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 45,397 psi | 68% | 3031 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 40,321 psi | 60% | 2930 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 42% | 1946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,485 psi | 71% | 3074 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,876 psi | 69% | 3091 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 37,579 psi | 56% | 2936 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 49,951 psi | 75% | 3182 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 54,491 psi | 82% | 3140 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 46,601 psi | 70% | 3015 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 41,597 psi | 62% | 2946 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 49,719 psi | 75% | 3061 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,733 psi | 73% | 3038 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 47,166 psi | 71% | 3022 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,970 psi | 84% | 3196 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,925 psi | 81% | 3012 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,834 psi | 72% | 2979 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 41,249 psi | 62% | 2940 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 53,998 psi | 81% | 3133 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 47,921 psi | 72% | 2999 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 43,410 psi | 65% | 2992 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,523 psi | 59% | 2867 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 51,866 psi | 78% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,819 psi | 72% | 3038 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 39,247 psi | 59% | 2848 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,253 psi | 71% | 3038 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 38,087 psi | 57% | 2881 fps | 98.7% |
| Vihtavuori N560 | 80 gr | 88% | 49,763 psi | 75% | 3166 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 92% | 46,731 psi | 70% | 3074 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 98% | 50,952 psi | 76% | 3196 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,224 psi | 71% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,182 psi | 74% | 3110 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,429 psi | 46% | 2792 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 41,742 psi | 63% | 2910 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 | 120gr | Sierra Pro-Hunter. ReloadSwiss RS 76 delivers the highest muzzle velocity at 3,402 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,402 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 120.0 gr projectile in 0.284" calls for a 1:16.0 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. Norma MRP, Vihtavuori N560, Ramshot Grand rank at the top here: for 7 mm STW with the .284 | 120gr | Sierra Pro-Hunter 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.