Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Barnes Solid bullet and 75 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 Hodgdon Retumbo.
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% | 58,943 psi | 88% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 59,973 psi | 90% | 3071 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,841 psi | 87% | 3130 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 59,741 psi | 90% | 3022 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 56,855 psi | 85% | 3071 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 58,871 psi | 88% | 3136 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,968 psi | 79% | 3028 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,572 psi | 71% | 2986 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,927 psi | 85% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,131 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 60,118 psi | 90% | 3114 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,045 psi | 89% | 3130 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,478 psi | 85% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 60,046 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,363 psi | 86% | 3133 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 60,118 psi | 90% | 3087 fps | 97.1% |
| Bofors RP15 | <<locked>> | 96% | 57,914 psi | 87% | 3110 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,014 psi | 84% | 3100 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 59,045 psi | 89% | 3130 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 57,740 psi | 87% | 3012 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,726 psi | 88% | 3120 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 57,450 psi | 86% | 3064 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 59,944 psi | 90% | 3081 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 58,392 psi | 88% | 3068 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,203 psi | 86% | 3048 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,188 psi | 86% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,885 psi | 88% | 3238 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,450 psi | 88% | 3100 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,202 psi | 56% | 1952 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,727 psi | 90% | 3051 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,248 psi | 89% | 3038 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 59,973 psi | 90% | 3054 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,016 psi | 88% | 3048 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 56,753 psi | 85% | 3114 fps | 98.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,975 psi | 64% | 2881 fps | 96.3% |
| Lovex S065 | <<locked>> | 86% | 60,104 psi | 90% | 3035 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,233 psi | 87% | 3028 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 60,205 psi | 90% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,203 psi | 86% | 3051 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 43,439 psi | 65% | 2913 fps | 98.6% |
| Norma MRP | <<locked>> | 92% | 59,205 psi | 89% | 3153 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,870 psi | 87% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,783 psi | 87% | 3133 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 56,840 psi | 85% | 3051 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,188 psi | 84% | 3058 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 57% | 1998 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 60,147 psi | 90% | 3091 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,610 psi | 88% | 3120 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,130 psi | 84% | 3173 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,317 psi | 83% | 3117 fps | 98% |
| Rottweil R 903 | <<locked>> | 82% | 59,292 psi | 89% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,885 psi | 87% | 3038 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 59,944 psi | 90% | 3107 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 57,740 psi | 87% | 3012 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,104 psi | 90% | 3035 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,233 psi | 87% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,697 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,277 psi | 89% | 2986 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,509 psi | 89% | 3104 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 58,755 psi | 88% | 3005 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,611 psi | 89% | 3025 fps | 98.7% |
| Somchem S365 | <<locked>> | 88% | 58,842 psi | 88% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 60,278 psi | 90% | 3074 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 60,133 psi | 90% | 2972 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,770 psi | 90% | 3041 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 60,234 psi | 90% | 3054 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 59,001 psi | 88% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,653 psi | 88% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,813 psi | 88% | 3146 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 58,914 psi | 88% | 3123 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,956 psi | 84% | 3120 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,683 psi | 89% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,667 psi | 86% | 3068 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 59,524 psi | 89% | 3182 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,492 psi | 85% | 3012 fps | 99.4% |
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% | 36,506 psi | 55% | 2631 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 48,675 psi | 73% | 2897 fps | 100% |
| Accurate MAGPRO | 73.8 gr | 86% | 46,746 psi | 70% | 2933 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 56,289 psi | 84% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,524 psi | 61% | 2762 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 41,553 psi | 62% | 2812 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 92% | 40,292 psi | 60% | 2772 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 34,040 psi | 51% | 2664 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,586 psi | 70% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,114 psi | 81% | 3025 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,509 psi | 61% | 2756 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,117 psi | 59% | 2756 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,070 psi | 53% | 2657 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,501 psi | 46% | 2559 fps | 95.9% |
| Alliant Reloder-26 | 69.4 gr | 80% | 39,001 psi | 58% | 2805 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,026 psi | 79% | 2966 fps | 95.5% |
| Bofors RP15 | <<locked>> | 84% | 38,798 psi | 58% | 2746 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 39,508 psi | 59% | 2785 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 39,117 psi | 59% | 2756 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 51,010 psi | 76% | 2900 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 38,493 psi | 58% | 2736 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 50,241 psi | 75% | 2946 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 52,518 psi | 79% | 2959 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 44,483 psi | 67% | 2822 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,569 psi | 65% | 2802 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,830 psi | 66% | 2779 fps | 100% |
| Hodgdon Retumbo | 69.8 gr | 86% | 36,506 psi | 55% | 2772 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 50,488 psi | 76% | 2976 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 42% | 1749 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,311 psi | 69% | 2828 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,257 psi | 78% | 2927 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 46,180 psi | 69% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,960 psi | 64% | 2759 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 42,946 psi | 64% | 2854 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,089 psi | 60% | 2815 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,719 psi | 75% | 2874 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,095 psi | 72% | 2861 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 31,401 psi | 47% | 2500 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 46,528 psi | 70% | 2867 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 35,186 psi | 53% | 2720 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 38,392 psi | 58% | 2766 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 47,485 psi | 71% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,784 psi | 60% | 2792 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 46,441 psi | 70% | 2874 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 35,650 psi | 53% | 2664 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 43% | 1791 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,776 psi | 73% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,137 psi | 71% | 2936 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 33,286 psi | 50% | 2671 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,859 psi | 66% | 2904 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 55,564 psi | 83% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,713 psi | 63% | 2743 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,030 psi | 60% | 2746 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 51,010 psi | 76% | 2900 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,719 psi | 75% | 2874 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,095 psi | 72% | 2861 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,984 psi | 82% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,820 psi | 73% | 2822 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,697 psi | 60% | 2740 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 55,129 psi | 83% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 45,701 psi | 69% | 2789 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 44,802 psi | 67% | 2838 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,451 psi | 61% | 2726 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 52,852 psi | 79% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,936 psi | 73% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,070 psi | 53% | 2592 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,312 psi | 72% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,392 psi | 59% | 2740 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 44,222 psi | 66% | 2881 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 88% | 41,698 psi | 63% | 2808 fps | 95% |
| Vihtavuori N568 | <<locked>> | 96% | 48,312 psi | 72% | 2986 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,443 psi | 73% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,415 psi | 76% | 2949 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,415 psi | 47% | 2677 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,057 psi | 56% | 2644 fps | 95.1% |
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 75 powders for 7 mm STW loaded with the .284 | 140gr | Barnes Solid. Hodgdon Retumbo delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,238 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 140.0 gr projectile in 0.284" calls for a 1:9.5 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. Accurate MAGPRO, Alliant Reloder-26, Hodgdon Retumbo rank at the top here: for 7 mm STW with the .284 | 140gr | Barnes Solid 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.