Load Specifications
Load data in caliber 7 mm STW with .284 | 120gr | Hornady V-MAX bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Winchester StaBALL HD.
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% | 59,364 psi | 89% | 3225 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 60,118 psi | 90% | 3271 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 58,146 psi | 87% | 3314 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 56,884 psi | 85% | 3179 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,261 psi | 86% | 3261 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 59,030 psi | 88% | 3323 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,545 psi | 74% | 3130 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,396 psi | 67% | 3077 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,378 psi | 88% | 3205 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,942 psi | 85% | 3271 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 58,363 psi | 87% | 3284 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,739 psi | 85% | 3245 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 59,016 psi | 88% | 3317 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 60,133 psi | 90% | 3287 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,028 psi | 84% | 3287 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,217 psi | 86% | 3323 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,885 psi | 87% | 3294 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 59,596 psi | 89% | 3219 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,895 psi | 78% | 3205 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 59,016 psi | 88% | 3317 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 58,392 psi | 88% | 3212 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,708 psi | 82% | 3232 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 59,698 psi | 89% | 3245 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 57,841 psi | 87% | 3264 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 56,637 psi | 85% | 3219 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 58,798 psi | 88% | 3255 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,624 psi | 86% | 3235 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,217 psi | 86% | 3186 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,853 psi | 82% | 3353 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 59,088 psi | 89% | 3297 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 55% | 2103 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 59,915 psi | 90% | 3215 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 60,278 psi | 90% | 3248 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 59,930 psi | 90% | 3238 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 60,350 psi | 90% | 3255 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 59,582 psi | 89% | 3238 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 96% | 56,753 psi | 85% | 3291 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 60,263 psi | 90% | 3205 fps | 100% |
| Lovex S065 | <<locked>> | 86% | 57,014 psi | 85% | 3179 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 58,755 psi | 88% | 3225 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,289 psi | 84% | 3176 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,783 psi | 87% | 3245 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 59,190 psi | 89% | 3340 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 58,218 psi | 87% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,870 psi | 87% | 3317 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 57,217 psi | 86% | 3245 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 56,434 psi | 85% | 3241 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 56% | 2152 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 59,379 psi | 89% | 3225 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,986 psi | 87% | 3278 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,391 psi | 85% | 3228 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 59,045 psi | 89% | 3320 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,086 psi | 84% | 3350 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 59,915 psi | 90% | 3222 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,349 psi | 87% | 3228 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 60,176 psi | 90% | 3297 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 58,392 psi | 88% | 3212 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,014 psi | 85% | 3179 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 60,263 psi | 90% | 3205 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 58,755 psi | 88% | 3225 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,638 psi | 86% | 3222 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 59,321 psi | 89% | 3084 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 60,220 psi | 90% | 3182 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 59,712 psi | 90% | 3291 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 59,277 psi | 89% | 3212 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,420 psi | 85% | 3150 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 58,958 psi | 88% | 3251 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,739 psi | 85% | 3205 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 57,087 psi | 86% | 3127 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 60,133 psi | 90% | 3241 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 60,321 psi | 90% | 3238 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 59,350 psi | 89% | 3241 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 58,465 psi | 88% | 3261 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 58,827 psi | 88% | 3330 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 58,987 psi | 88% | 3304 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,130 psi | 84% | 3133 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,073 psi | 87% | 3268 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 58,668 psi | 88% | 3373 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,029 psi | 85% | 3199 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% | 33,953 psi | 51% | 2723 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 45,513 psi | 68% | 3022 fps | 99.5% |
| Accurate MAGPRO | 80.5 gr | 90% | 50,212 psi | 75% | 3169 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 53,287 psi | 80% | 3123 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 43,526 psi | 65% | 2999 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 47,863 psi | 72% | 3114 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 46,180 psi | 69% | 3061 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 94% | 36,245 psi | 54% | 2871 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,636 psi | 82% | 3146 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,337 psi | 65% | 3028 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,575 psi | 76% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 43,555 psi | 65% | 2992 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,742 psi | 63% | 2982 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,430 psi | 49% | 2756 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 84% | 32,474 psi | 49% | 2766 fps | 95.1% |
| Alliant Reloder-26 | 72.3 gr | 80% | 35,694 psi | 54% | 2890 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 44,338 psi | 66% | 3038 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 55,724 psi | 84% | 3163 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 45,179 psi | 68% | 3074 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 41,742 psi | 63% | 2982 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 48,283 psi | 72% | 3031 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 94% | 44,222 psi | 66% | 3022 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 55,869 psi | 84% | 3182 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 47,311 psi | 71% | 3071 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 49,632 psi | 74% | 3091 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 51,242 psi | 77% | 3123 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 50,198 psi | 75% | 3104 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,002 psi | 61% | 2904 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 41,553 psi | 62% | 3061 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 47,036 psi | 71% | 3087 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 41% | 1890 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 56,072 psi | 84% | 3159 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,598 psi | 65% | 2946 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,574 psi | 74% | 3061 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 43,366 psi | 65% | 2963 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 49,153 psi | 74% | 3054 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 45,934 psi | 69% | 3084 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 56,681 psi | 85% | 3153 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 47,065 psi | 71% | 3005 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 45,513 psi | 68% | 2989 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 35,563 psi | 53% | 2766 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 43,787 psi | 66% | 2982 fps | 95.6% |
| Norma MRP | <<locked>> | 82% | 38,203 psi | 57% | 2927 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 44,657 psi | 67% | 3009 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 46,050 psi | 69% | 3097 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 43,598 psi | 65% | 2995 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 88% | 38,363 psi | 57% | 2887 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,137 psi | 42% | 1932 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 55,448 psi | 83% | 3159 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,722 psi | 81% | 3215 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,527 psi | 68% | 3035 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,888 psi | 66% | 3051 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 38,580 psi | 58% | 2969 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 52,547 psi | 79% | 3107 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 47,892 psi | 72% | 3038 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 42,728 psi | 64% | 2972 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 48,283 psi | 72% | 3031 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,065 psi | 71% | 3005 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 56,681 psi | 85% | 3153 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,513 psi | 68% | 2989 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,983 psi | 81% | 3163 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,286 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% | 42,366 psi | 64% | 2969 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 52,156 psi | 78% | 3100 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,414 psi | 74% | 3025 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 41,495 psi | 62% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 40,524 psi | 61% | 2890 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 50,111 psi | 75% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,035 psi | 69% | 3005 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 40,161 psi | 60% | 2867 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 45,600 psi | 68% | 3009 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 36,492 psi | 55% | 2844 fps | 98.2% |
| Vihtavuori N560 | <<locked>> | 88% | 47,456 psi | 71% | 3120 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 47,761 psi | 72% | 3100 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,368 psi | 68% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,311 psi | 71% | 3071 fps | 98.2% |
| Winchester StaBALL HD | 69.5 gr | 80% | 28,993 psi | 43% | 2743 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 42,873 psi | 64% | 2936 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 79 powders for 7 mm STW loaded with the .284 | 120gr | Hornady V-MAX. 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 79 of the 79 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. Accurate MAGPRO, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 120gr | Hornady V-MAX 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.