Load Specifications
Load data in caliber 7 mm STW with .284 | 120gr | Barnes X BT bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Alliant Reloder-26 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>> | 94% | 59,538 psi | 89% | 3215 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 60,249 psi | 90% | 3261 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,537 psi | 86% | 3297 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 59,306 psi | 89% | 3209 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 60,147 psi | 90% | 3301 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 94% | 58,247 psi | 87% | 3301 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,634 psi | 79% | 3182 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,718 psi | 72% | 3146 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,799 psi | 90% | 3307 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,580 psi | 86% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,654 psi | 89% | 3284 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,595 psi | 88% | 3301 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,741 psi | 90% | 3274 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 59,422 psi | 89% | 3333 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,927 psi | 85% | 3310 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 57,580 psi | 86% | 3281 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,637 psi | 83% | 3268 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 58,595 psi | 88% | 3301 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 57,754 psi | 87% | 3192 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,870 psi | 87% | 3278 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 84% | 57,116 psi | 86% | 3241 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 59,466 psi | 89% | 3255 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 92% | 57,986 psi | 87% | 3235 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,913 psi | 85% | 3215 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,927 psi | 85% | 3173 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,218 psi | 87% | 3409 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 58,088 psi | 87% | 3274 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,231 psi | 56% | 2103 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,393 psi | 89% | 3225 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,827 psi | 88% | 3212 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 60,017 psi | 90% | 3241 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,639 psi | 88% | 3215 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 96% | 59,915 psi | 90% | 3340 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 60,002 psi | 90% | 3215 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,407 psi | 88% | 3212 fps | 99.7% |
| Lovex S071 | <<locked>> | 98% | 57,000 psi | 85% | 3179 fps | 99.9% |
| Norma 204 | <<locked>> | 86% | 56,855 psi | 85% | 3222 fps | 98.6% |
| Norma 217ᴾ | <<locked>> | 100% | 43,584 psi | 65% | 3071 fps | 97.4% |
| Norma MRP | <<locked>> | 92% | 58,697 psi | 88% | 3327 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 57,740 psi | 87% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,898 psi | 85% | 3294 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 86% | 56,550 psi | 85% | 3228 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 60,176 psi | 90% | 3291 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 57% | 2152 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 59,886 psi | 90% | 3274 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,914 psi | 87% | 3297 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,872 psi | 90% | 3406 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,897 psi | 82% | 3274 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 59,727 psi | 90% | 3205 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,508 psi | 86% | 3205 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 92% | 59,408 psi | 89% | 3274 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 84% | 57,754 psi | 87% | 3192 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,002 psi | 90% | 3215 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,407 psi | 88% | 3212 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,392 psi | 88% | 3061 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,335 psi | 89% | 3163 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,943 psi | 88% | 3271 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 58,813 psi | 88% | 3192 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,611 psi | 89% | 3192 fps | 97.7% |
| Somchem S365 | <<locked>> | 88% | 58,668 psi | 88% | 3238 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 60,350 psi | 90% | 3251 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 60,031 psi | 90% | 3156 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,466 psi | 89% | 3219 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,814 psi | 90% | 3222 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 86% | 58,987 psi | 88% | 3228 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,740 psi | 88% | 3258 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,204 psi | 87% | 3314 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 98% | 58,929 psi | 88% | 3294 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,579 psi | 83% | 3281 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,190 psi | 89% | 3169 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,348 psi | 86% | 3245 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,450 psi | 88% | 3366 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 60,176 psi | 90% | 3238 fps | 99.1% |
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% | 37,942 psi | 57% | 2812 fps | 96.7% |
| Accurate 4350 | <<locked>> | 80% | 49,516 psi | 74% | 3084 fps | 99.9% |
| Accurate MAGPRO | 78.4 gr | 88% | 50,096 psi | 75% | 3159 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 55,912 psi | 84% | 3156 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 43,526 psi | 65% | 2989 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 47,718 psi | 72% | 3104 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 96% | 46,238 psi | 69% | 3051 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 92% | 37,028 psi | 56% | 2884 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,296 psi | 69% | 3077 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,635 psi | 80% | 3205 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 43,453 psi | 65% | 2979 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 42,250 psi | 63% | 2986 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,708 psi | 54% | 2831 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 33,460 psi | 50% | 2789 fps | 95.7% |
| Alliant Reloder-26 | 72.1 gr | 80% | 39,465 psi | 59% | 2979 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 41,887 psi | 63% | 2976 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 45,643 psi | 68% | 3077 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 42,250 psi | 63% | 2986 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 51,097 psi | 77% | 3074 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 44,382 psi | 67% | 3015 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 50,270 psi | 75% | 3120 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 52,446 psi | 79% | 3133 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 50,691 psi | 76% | 3100 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 49,908 psi | 75% | 3091 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,164 psi | 66% | 2959 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 42,090 psi | 63% | 3068 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,111 psi | 75% | 3140 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 42% | 1890 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,383 psi | 70% | 2992 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,112 psi | 78% | 3097 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 46,630 psi | 70% | 3015 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 48,805 psi | 73% | 3038 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 45,963 psi | 69% | 3077 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 50,198 psi | 75% | 3051 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 48,617 psi | 73% | 3038 fps | 98.6% |
| Lovex S071 | <<locked>> | 82% | 34,983 psi | 52% | 2740 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 46,586 psi | 70% | 3028 fps | 96.4% |
| Norma 217 | <<locked>> | 96% | 38,363 psi | 57% | 2946 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 38,827 psi | 58% | 2933 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 47,732 psi | 72% | 3058 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 46,079 psi | 69% | 3087 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 46,572 psi | 70% | 3048 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 86% | 39,030 psi | 59% | 2894 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 43% | 1936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,168 psi | 74% | 3097 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,847 psi | 70% | 3104 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 36,651 psi | 55% | 2907 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 51,053 psi | 77% | 3202 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 56,028 psi | 84% | 3150 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 47,616 psi | 71% | 3025 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 82% | 43,047 psi | 65% | 2969 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,097 psi | 77% | 3074 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,198 psi | 75% | 3051 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 48,617 psi | 73% | 3038 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,955 psi | 82% | 3012 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,284 psi | 74% | 2992 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 42,685 psi | 64% | 2966 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 55,419 psi | 83% | 3143 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 49,037 psi | 74% | 3009 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 45,049 psi | 68% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,249 psi | 62% | 2894 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 53,069 psi | 80% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,211 psi | 74% | 3054 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 40,698 psi | 61% | 2871 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 48,718 psi | 73% | 3058 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 40,176 psi | 60% | 2920 fps | 99.1% |
| Vihtavuori N560 | 75.2 gr | 86% | 47,456 psi | 71% | 3110 fps | 95% |
| Vihtavuori N565 | <<locked>> | 92% | 48,298 psi | 72% | 3104 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 98% | 51,909 psi | 78% | 3212 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,370 psi | 73% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,488 psi | 76% | 3123 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,300 psi | 48% | 2848 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 84% | 43,004 psi | 64% | 2930 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 78 powders for 7 mm STW loaded with the .284 | 120gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,409 fps; across all powders the maximum-charge window runs from 2,103 fps to 3,409 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 1:11.5 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, Alliant Reloder-26, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 120gr | Barnes X BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 8133 Enduron, Vihtavuori N170 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.