Load Specifications
Load data in caliber 7 mm STW with .284 | 125gr | Hasler ARIETE bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Ramshot Grand and Accurate MAGPRO.
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% | 57,653 psi | 86% | 3153 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 60,060 psi | 90% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 58,943 psi | 88% | 3205 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,855 psi | 85% | 3251 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 59,799 psi | 90% | 3173 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 60,278 psi | 90% | 3261 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 58,059 psi | 87% | 3258 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,428 psi | 73% | 3068 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,221 psi | 65% | 3015 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,217 psi | 86% | 3136 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 59,944 psi | 90% | 3268 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 57,479 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 59,553 psi | 89% | 3245 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,885 psi | 87% | 3251 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 58,900 psi | 88% | 3222 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,766 psi | 82% | 3225 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,724 psi | 84% | 3251 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 60,118 psi | 90% | 3212 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 56,753 psi | 85% | 3228 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 58,508 psi | 88% | 3156 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,531 psi | 76% | 3140 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 57,885 psi | 87% | 3251 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 57,406 psi | 86% | 3150 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,621 psi | 80% | 3169 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 58,581 psi | 88% | 3176 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 56,971 psi | 85% | 3202 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 59,654 psi | 89% | 3219 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 57,783 psi | 87% | 3192 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,579 psi | 85% | 3173 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 60,176 psi | 90% | 3179 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,621 psi | 80% | 3287 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 58,015 psi | 87% | 3238 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 55% | 2057 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 59,045 psi | 89% | 3156 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 59,335 psi | 89% | 3186 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 59,132 psi | 89% | 3179 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 59,146 psi | 89% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,769 psi | 88% | 3179 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 59,727 psi | 90% | 3297 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 59,263 psi | 89% | 3140 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 59,582 psi | 89% | 3173 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,740 psi | 87% | 3163 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,998 psi | 82% | 3114 fps | 99.9% |
| Norma 203B | <<locked>> | 82% | 60,365 psi | 90% | 3202 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,797 psi | 85% | 3186 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 58,059 psi | 87% | 3278 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 57,232 psi | 86% | 3186 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,623 psi | 85% | 3251 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 60,162 psi | 90% | 3245 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 59,785 psi | 90% | 3248 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 56% | 2100 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 58,233 psi | 87% | 3159 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,739 psi | 85% | 3209 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 59,190 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,870 psi | 87% | 3258 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,824 psi | 82% | 3284 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 58,610 psi | 88% | 3153 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,392 psi | 86% | 3166 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 58,972 psi | 88% | 3235 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 57,406 psi | 86% | 3150 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 59,582 psi | 89% | 3173 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 59,263 psi | 89% | 3140 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,740 psi | 87% | 3163 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,666 psi | 85% | 3156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 58,465 psi | 88% | 3025 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 59,059 psi | 89% | 3120 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 58,508 psi | 88% | 3228 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 58,334 psi | 87% | 3150 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 59,466 psi | 89% | 3153 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 57,725 psi | 87% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 59,393 psi | 89% | 3199 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 59,959 psi | 90% | 3120 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 59,234 psi | 89% | 3179 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 59,306 psi | 89% | 3176 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 82% | 60,292 psi | 90% | 3110 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 58,276 psi | 87% | 3179 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,203 psi | 86% | 3196 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,827 psi | 87% | 3271 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,653 psi | 86% | 3238 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 59,379 psi | 89% | 3133 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,971 psi | 85% | 3202 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,276 psi | 86% | 3307 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 60,176 psi | 90% | 3202 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>> | 82% | 35,056 psi | 53% | 2717 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 56,304 psi | 84% | 3077 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 44,251 psi | 66% | 2953 fps | 99.5% |
| Accurate MAGPRO | 78.7 gr | 90% | 49,008 psi | 73% | 3104 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 52,620 psi | 79% | 3061 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,612 psi | 64% | 2936 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 46,920 psi | 70% | 3054 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 45,194 psi | 68% | 2999 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 96% | 37,666 psi | 56% | 2877 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,664 psi | 80% | 3084 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,598 psi | 64% | 2969 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,501 psi | 74% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,569 psi | 64% | 2930 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,727 psi | 61% | 2920 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,502 psi | 47% | 2690 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,620 psi | 50% | 2766 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,548 psi | 52% | 2822 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,231 psi | 84% | 3146 fps | 95.1% |
| Bofors RP15 | <<locked>> | 90% | 43,192 psi | 65% | 2972 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 54,563 psi | 82% | 3097 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 43,729 psi | 66% | 3002 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 40,727 psi | 61% | 2920 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 47,297 psi | 71% | 2969 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 43,337 psi | 65% | 2966 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 54,694 psi | 82% | 3117 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 46,224 psi | 69% | 3005 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 48,834 psi | 73% | 3028 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 50,299 psi | 75% | 3061 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 49,226 psi | 74% | 3041 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,914 psi | 60% | 2841 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,538 psi | 61% | 2999 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 45,963 psi | 69% | 3022 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 41% | 1847 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 55,376 psi | 83% | 3097 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,743 psi | 64% | 2887 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,733 psi | 73% | 2999 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 42,235 psi | 63% | 2897 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 48,370 psi | 73% | 2995 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 90% | 44,933 psi | 67% | 3022 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 55,593 psi | 83% | 3087 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 46,180 psi | 69% | 2943 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 44,454 psi | 67% | 2923 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 34,258 psi | 51% | 2694 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 56,608 psi | 85% | 3146 fps | 100% |
| Norma 204 | <<locked>> | 80% | 42,772 psi | 64% | 2920 fps | 95.6% |
| Norma MRP | <<locked>> | 82% | 37,115 psi | 56% | 2858 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 43,627 psi | 65% | 2946 fps | 99.4% |
| Ramshot Grand | 76.6 gr | 90% | 45,034 psi | 68% | 3031 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 42,540 psi | 64% | 2930 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 40,205 psi | 60% | 2890 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 42% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,433 psi | 82% | 3097 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,692 psi | 79% | 3153 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,353 psi | 66% | 2972 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,902 psi | 64% | 2986 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 37,275 psi | 56% | 2897 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 51,358 psi | 77% | 3041 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,978 psi | 70% | 2979 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 41,800 psi | 63% | 2913 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 47,297 psi | 71% | 2969 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,180 psi | 69% | 2943 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 55,593 psi | 83% | 3087 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 44,454 psi | 67% | 2923 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,924 psi | 79% | 3097 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,532 psi | 77% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,121 psi | 68% | 2884 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,452 psi | 62% | 2907 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 51,285 psi | 77% | 3038 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,283 psi | 72% | 2963 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 40,408 psi | 61% | 2894 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 39,508 psi | 59% | 2828 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 49,095 psi | 74% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,092 psi | 68% | 2943 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 39,175 psi | 59% | 2808 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 56,434 psi | 85% | 3058 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 44,454 psi | 67% | 2940 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 35,230 psi | 53% | 2772 fps | 98.1% |
| Vihtavuori N560 | 75.5 gr | 88% | 46,441 psi | 70% | 3058 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 46,470 psi | 70% | 3035 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,498 psi | 67% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,398 psi | 70% | 3012 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,833 psi | 42% | 2667 fps | 97.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,771 psi | 63% | 2871 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 83 powders for 7 mm STW loaded with the .284 | 125gr | Hasler ARIETE. Winchester StaBALL HD delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 2,057 fps to 3,307 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 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 125.0 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, 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. Vihtavuori N560, Ramshot Grand, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 125gr | Hasler ARIETE 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.