Load Specifications
Load data in caliber 7 mm STW with .284 | 127gr | Hasler Hunting bullet and 80 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% | 58,798 psi | 88% | 3153 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 59,843 psi | 90% | 3199 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,986 psi | 87% | 3251 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 56,855 psi | 85% | 3110 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,203 psi | 86% | 3196 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 59,219 psi | 89% | 3261 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,356 psi | 74% | 3071 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,121 psi | 66% | 3018 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,015 psi | 87% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,971 psi | 85% | 3202 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 58,421 psi | 88% | 3219 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,623 psi | 85% | 3179 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 59,045 psi | 89% | 3251 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 60,147 psi | 90% | 3219 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,927 psi | 84% | 3222 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 57,043 psi | 86% | 3251 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,914 psi | 87% | 3232 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 59,364 psi | 89% | 3150 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,677 psi | 77% | 3143 fps | 97.8% |
| Bofors RP5 | <<locked>> | 96% | 59,045 psi | 89% | 3251 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 58,146 psi | 87% | 3143 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,679 psi | 82% | 3173 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 59,379 psi | 89% | 3169 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 57,841 psi | 87% | 3196 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 56,753 psi | 85% | 3153 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 58,885 psi | 88% | 3192 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,653 psi | 86% | 3173 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,174 psi | 86% | 3120 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,766 psi | 82% | 3287 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 86% | 59,146 psi | 89% | 3235 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 55% | 2044 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 59,828 psi | 90% | 3146 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 60,133 psi | 90% | 3179 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 59,857 psi | 90% | 3173 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 60,249 psi | 90% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 59,524 psi | 89% | 3176 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 56,855 psi | 85% | 3232 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 60,075 psi | 90% | 3133 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 60,336 psi | 90% | 3166 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 58,552 psi | 88% | 3156 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,898 psi | 84% | 3107 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 57,841 psi | 87% | 3182 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 39,465 psi | 59% | 2927 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 58,987 psi | 88% | 3274 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 58,117 psi | 87% | 3179 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,870 psi | 87% | 3251 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 57,276 psi | 86% | 3182 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,507 psi | 85% | 3182 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,608 psi | 56% | 2090 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 59,219 psi | 89% | 3156 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 58,001 psi | 87% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 60,336 psi | 90% | 3222 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 58,842 psi | 88% | 3251 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,028 psi | 84% | 3287 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 59,480 psi | 89% | 3146 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,189 psi | 87% | 3163 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 60,104 psi | 90% | 3232 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 58,146 psi | 87% | 3143 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 60,336 psi | 90% | 3166 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 60,075 psi | 90% | 3133 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 58,552 psi | 88% | 3156 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,740 psi | 87% | 3153 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 59,219 psi | 89% | 3015 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 60,075 psi | 90% | 3117 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 59,640 psi | 89% | 3225 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 59,146 psi | 89% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,347 psi | 84% | 3087 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 58,682 psi | 88% | 3176 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,478 psi | 85% | 3136 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 56,768 psi | 85% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 60,104 psi | 90% | 3173 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,304 psi | 84% | 3117 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 59,306 psi | 89% | 3176 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 58,131 psi | 87% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 58,740 psi | 88% | 3268 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 58,813 psi | 88% | 3238 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 60,191 psi | 90% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,073 psi | 87% | 3199 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 58,682 psi | 88% | 3301 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,782 psi | 85% | 3130 fps | 99% |
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% | 33,301 psi | 50% | 2654 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 45,049 psi | 68% | 2949 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 49,850 psi | 75% | 3104 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,359 psi | 80% | 3054 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,451 psi | 61% | 2871 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 88% | 44,527 psi | 67% | 2986 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 46,079 psi | 69% | 3002 fps | 96% |
| ADI AR 2225 | <<locked>> | 94% | 35,853 psi | 54% | 2812 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,433 psi | 82% | 3074 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,366 psi | 65% | 2966 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,372 psi | 76% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,335 psi | 60% | 2861 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,481 psi | 62% | 2920 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,126 psi | 48% | 2690 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,995 psi | 48% | 2703 fps | 95.5% |
| Alliant Reloder-26 | 71 gr | 80% | 35,288 psi | 53% | 2825 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 41,075 psi | 62% | 2907 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 55,390 psi | 83% | 3091 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 44,788 psi | 67% | 3009 fps | 96% |
| Bofors RP5 | <<locked>> | 86% | 41,481 psi | 62% | 2920 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 47,950 psi | 72% | 2966 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 44,048 psi | 66% | 2963 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 55,463 psi | 83% | 3110 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 46,978 psi | 70% | 3005 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 49,545 psi | 74% | 3028 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 47,732 psi | 72% | 2995 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 46,731 psi | 70% | 2976 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,640 psi | 61% | 2838 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,551 psi | 58% | 2927 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 46,934 psi | 70% | 3025 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 41% | 1834 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 56,144 psi | 84% | 3091 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,410 psi | 65% | 2884 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,414 psi | 74% | 2995 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 42,975 psi | 64% | 2894 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,021 psi | 69% | 2933 fps | 95.2% |
| IMR 7828 SSC | 74.7 gr | 90% | 45,861 psi | 69% | 3025 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 56,376 psi | 85% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 46,876 psi | 70% | 2940 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 45,136 psi | 68% | 2923 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 32,561 psi | 49% | 2635 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 43,468 psi | 65% | 2917 fps | 96% |
| Norma 217 | <<locked>> | 98% | 36,637 psi | 55% | 2854 fps | 95.2% |
| Norma MRP | <<locked>> | 82% | 37,840 psi | 57% | 2861 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 44,382 psi | 67% | 2943 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 45,847 psi | 69% | 3035 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 43,250 psi | 65% | 2927 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 37,985 psi | 57% | 2825 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 42% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 55,390 psi | 83% | 3097 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,650 psi | 80% | 3146 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,339 psi | 68% | 2972 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,642 psi | 65% | 2986 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,317 psi | 53% | 2825 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 52,156 psi | 78% | 3035 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,657 psi | 67% | 2913 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 39,537 psi | 59% | 2844 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,950 psi | 72% | 2966 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,876 psi | 70% | 2940 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 56,376 psi | 85% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,136 psi | 68% | 2923 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,708 psi | 81% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,243 psi | 78% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,759 psi | 69% | 2877 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,192 psi | 63% | 2907 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 52,011 psi | 78% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,124 psi | 74% | 2963 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 41,205 psi | 62% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,449 psi | 56% | 2762 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 49,821 psi | 75% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,832 psi | 69% | 2940 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 39,842 psi | 60% | 2808 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 45,179 psi | 68% | 2936 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 35,940 psi | 54% | 2772 fps | 98.4% |
| Vihtavuori N560 | <<locked>> | 88% | 47,427 psi | 71% | 3061 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 47,471 psi | 71% | 3038 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,194 psi | 68% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,137 psi | 71% | 3009 fps | 98.5% |
| Winchester StaBALL HD | 68.2 gr | 80% | 28,384 psi | 43% | 2674 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,639 psi | 59% | 2808 fps | 95% |
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 80 powders for 7 mm STW loaded with the .284 | 127gr | Hasler Hunting. Winchester StaBALL HD delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 2,044 fps to 3,301 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 127.0 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. Alliant Reloder-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 127gr | Hasler Hunting 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.