Load Specifications
Load data in caliber 7 mm STW with .284 | 125gr | Lehigh Defense Controlled Chaos bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and IMR 7828 SSC.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 59,408 psi | 89% | 3176 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 60,350 psi | 90% | 3222 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 58,088 psi | 87% | 3268 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 56,985 psi | 85% | 3130 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,377 psi | 86% | 3215 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 59,132 psi | 89% | 3274 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,501 psi | 74% | 3084 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,367 psi | 67% | 3038 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,551 psi | 86% | 3209 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,479 psi | 88% | 3153 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,072 psi | 86% | 3222 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 58,610 psi | 88% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,840 psi | 85% | 3199 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 59,059 psi | 89% | 3268 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 60,162 psi | 90% | 3238 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,941 psi | 84% | 3241 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,145 psi | 86% | 3274 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,928 psi | 87% | 3248 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 59,785 psi | 90% | 3169 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,837 psi | 78% | 3163 fps | 97.7% |
| Bofors RP5 | <<locked>> | 96% | 59,059 psi | 89% | 3268 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 58,450 psi | 88% | 3163 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,708 psi | 82% | 3186 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 59,712 psi | 90% | 3192 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 58,044 psi | 87% | 3215 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 56,681 psi | 85% | 3169 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 59,059 psi | 89% | 3212 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,899 psi | 87% | 3192 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,392 psi | 86% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,839 psi | 82% | 3307 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 59,103 psi | 89% | 3251 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 55% | 2057 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 59,959 psi | 90% | 3166 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 60,321 psi | 90% | 3199 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 60,002 psi | 90% | 3189 fps | 99.8% |
| IMR 4831 | <<locked>> | 88% | 56,608 psi | 85% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 59,727 psi | 90% | 3192 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 56,826 psi | 85% | 3248 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 60,365 psi | 90% | 3153 fps | 100% |
| Lovex S065 | <<locked>> | 86% | 57,014 psi | 85% | 3130 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 58,885 psi | 88% | 3179 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,492 psi | 85% | 3133 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,841 psi | 87% | 3199 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 39,871 psi | 60% | 2953 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 59,292 psi | 89% | 3297 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 58,334 psi | 87% | 3199 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,856 psi | 87% | 3268 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 57,276 psi | 86% | 3196 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 56,565 psi | 85% | 3199 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 56% | 2103 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 59,437 psi | 89% | 3176 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 58,117 psi | 87% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,420 psi | 85% | 3179 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 58,987 psi | 88% | 3271 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,144 psi | 84% | 3304 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 59,857 psi | 90% | 3166 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,407 psi | 88% | 3179 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 60,118 psi | 90% | 3248 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 58,450 psi | 88% | 3163 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,014 psi | 85% | 3130 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 60,365 psi | 90% | 3153 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 58,885 psi | 88% | 3179 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,928 psi | 87% | 3173 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 59,335 psi | 89% | 3031 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 60,147 psi | 90% | 3133 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 59,654 psi | 89% | 3241 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 59,422 psi | 89% | 3159 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,449 psi | 85% | 3104 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 58,943 psi | 88% | 3199 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,869 psi | 85% | 3156 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 57,029 psi | 85% | 3077 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 60,336 psi | 90% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,652 psi | 85% | 3136 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 59,654 psi | 89% | 3199 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 58,552 psi | 88% | 3215 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 59,001 psi | 88% | 3287 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 59,030 psi | 88% | 3258 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 60,365 psi | 90% | 3143 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,291 psi | 87% | 3219 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 58,682 psi | 88% | 3323 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,072 psi | 86% | 3150 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% | 34,026 psi | 51% | 2687 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 45,643 psi | 68% | 2976 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 50,270 psi | 75% | 3127 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 53,519 psi | 80% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,741 psi | 61% | 2890 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 47,935 psi | 72% | 3071 fps | 96% |
| ADI AR 2217 | <<locked>> | 98% | 46,267 psi | 69% | 3022 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 94% | 36,245 psi | 54% | 2835 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,205 psi | 62% | 2894 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,665 psi | 82% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,555 psi | 65% | 2982 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,604 psi | 76% | 3114 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,814 psi | 61% | 2887 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,872 psi | 63% | 2943 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,619 psi | 49% | 2720 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 32,518 psi | 49% | 2730 fps | 95.5% |
| Alliant Reloder-26 | 70.6 gr | 80% | 35,795 psi | 54% | 2854 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 41,466 psi | 62% | 2933 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 55,840 psi | 84% | 3114 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 45,237 psi | 68% | 3035 fps | 96% |
| Bofors RP5 | <<locked>> | 86% | 41,872 psi | 63% | 2943 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 48,298 psi | 72% | 2986 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 44,396 psi | 67% | 2986 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 55,811 psi | 84% | 3130 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 47,282 psi | 71% | 3025 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 49,748 psi | 75% | 3045 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 47,819 psi | 72% | 3012 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 47,007 psi | 70% | 2995 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,176 psi | 62% | 2861 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,812 psi | 58% | 2949 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 47,210 psi | 71% | 3045 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 41% | 1844 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 56,260 psi | 84% | 3110 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,830 psi | 66% | 2907 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,588 psi | 74% | 3012 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 43,424 psi | 65% | 2920 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,282 psi | 69% | 2949 fps | 95% |
| IMR 7828 SSC | 74.2 gr | 90% | 45,992 psi | 69% | 3041 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 56,681 psi | 85% | 3100 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 47,239 psi | 71% | 2959 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 45,571 psi | 68% | 2943 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 33,315 psi | 50% | 2667 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 43,961 psi | 66% | 2940 fps | 95.9% |
| Norma 217 | <<locked>> | 98% | 37,260 psi | 56% | 2887 fps | 95.3% |
| Norma MRP | <<locked>> | 82% | 38,290 psi | 57% | 2887 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 44,744 psi | 67% | 2963 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 46,180 psi | 69% | 3054 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 43,743 psi | 66% | 2953 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 38,493 psi | 58% | 2848 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 42% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 55,651 psi | 83% | 3114 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,780 psi | 81% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,788 psi | 69% | 2995 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,947 psi | 66% | 3009 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,853 psi | 54% | 2854 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 52,591 psi | 79% | 3058 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,918 psi | 67% | 2933 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 39,929 psi | 60% | 2864 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 48,298 psi | 72% | 2986 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,239 psi | 71% | 2959 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 56,681 psi | 85% | 3100 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,571 psi | 68% | 2943 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,172 psi | 81% | 3114 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,402 psi | 79% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,354 psi | 69% | 2904 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,554 psi | 64% | 2930 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 52,388 psi | 79% | 3054 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,298 psi | 74% | 2979 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 41,771 psi | 63% | 2920 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,956 psi | 57% | 2785 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,140 psi | 75% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,151 psi | 69% | 2959 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 40,248 psi | 60% | 2831 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 45,556 psi | 68% | 2959 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 36,550 psi | 55% | 2802 fps | 98.5% |
| Vihtavuori N560 | <<locked>> | 88% | 47,558 psi | 71% | 3081 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 47,834 psi | 72% | 3058 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,469 psi | 68% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,442 psi | 71% | 3028 fps | 98.5% |
| Winchester StaBALL HD | 67.9 gr | 80% | 29,109 psi | 44% | 2713 fps | 98.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 43,033 psi | 65% | 2897 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 81 powders for 7 mm STW loaded with the .284 | 125gr | Lehigh Defense Controlled Chaos. Winchester StaBALL HD delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 2,057 fps to 3,323 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 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 1:10.0 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. Alliant Reloder-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 125gr | Lehigh Defense Controlled Chaos 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.