Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Sellier & Bellot FMJ bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Vihtavuori N560.
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>> | 92% | 57,667 psi | 86% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,233 psi | 87% | 3048 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,507 psi | 85% | 3110 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 90% | 59,190 psi | 89% | 3107 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 57,217 psi | 86% | 3110 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,579 psi | 83% | 3074 fps | 99.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,966 psi | 75% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,176 psi | 89% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,639 psi | 88% | 3094 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,522 psi | 86% | 3107 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 59,176 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 59,146 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,999 psi | 84% | 3107 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,291 psi | 87% | 3064 fps | 97% |
| Bofors RP15 | <<locked>> | 94% | 56,681 psi | 85% | 3091 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,900 psi | 88% | 3146 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 57,522 psi | 86% | 3107 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 59,698 psi | 89% | 3048 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,203 psi | 86% | 3104 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 59,683 psi | 89% | 3100 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,189 psi | 87% | 3058 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 56,768 psi | 85% | 3045 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,567 psi | 89% | 3091 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,321 psi | 89% | 3018 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 58,015 psi | 87% | 3225 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,768 psi | 85% | 3077 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 56% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 58,102 psi | 87% | 3031 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,334 psi | 86% | 3012 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,479 psi | 88% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,435 psi | 86% | 3028 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 59,379 psi | 89% | 3153 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,571 psi | 68% | 2930 fps | 97.2% |
| Lovex S065 | <<locked>> | 84% | 58,378 psi | 88% | 3015 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,579 psi | 85% | 3005 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 59,088 psi | 89% | 3035 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,466 psi | 89% | 3091 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,963 psi | 69% | 2956 fps | 99.1% |
| Norma MRP | <<locked>> | 90% | 57,711 psi | 87% | 3127 fps | 100% |
| Norma URP | <<locked>> | 86% | 60,191 psi | 90% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,434 psi | 85% | 3114 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 59,161 psi | 89% | 3087 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,393 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,566 psi | 88% | 3068 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,029 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,495 psi | 89% | 3219 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,798 psi | 88% | 3169 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 60,089 psi | 90% | 3077 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 58,436 psi | 88% | 3087 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 59,698 psi | 89% | 3048 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,378 psi | 88% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,579 psi | 85% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 60,292 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,580 psi | 86% | 2966 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 58,001 psi | 87% | 3081 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 58,088 psi | 87% | 3009 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 57,493 psi | 86% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,740 psi | 88% | 3051 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 58,407 psi | 88% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 58,044 psi | 87% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,682 psi | 88% | 3035 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,261 psi | 86% | 3018 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,464 psi | 86% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,276 psi | 86% | 3123 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 96% | 57,711 psi | 87% | 3107 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 59,205 psi | 89% | 3169 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,914 psi | 87% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,901 psi | 90% | 3104 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,392 psi | 88% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 59,045 psi | 89% | 3051 fps | 99.7% |
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% | 38,319 psi | 57% | 2667 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 50,894 psi | 76% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 45,484 psi | 68% | 2904 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 42,206 psi | 63% | 2802 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 82% | 40,480 psi | 61% | 2789 fps | 95% |
| ADI AR 2217 | <<locked>> | 92% | 42,206 psi | 63% | 2818 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 88% | 33,446 psi | 50% | 2648 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,457 psi | 73% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,293 psi | 63% | 2795 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,159 psi | 57% | 2733 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,825 psi | 55% | 2694 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,879 psi | 48% | 2598 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,191 psi | 62% | 2848 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,445 psi | 77% | 2943 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 38,014 psi | 57% | 2726 fps | 95.5% |
| Bofors RP30 | <<locked>> | 88% | 38,769 psi | 58% | 2766 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 38,159 psi | 57% | 2733 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 52,518 psi | 79% | 2933 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 40,248 psi | 60% | 2779 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 52,243 psi | 78% | 2982 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 54,534 psi | 82% | 2999 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 43,105 psi | 65% | 2795 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,409 psi | 64% | 2779 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,730 psi | 69% | 2815 fps | 100% |
| Hodgdon Retumbo | 70.7 gr | 84% | 35,694 psi | 54% | 2749 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 52,576 psi | 79% | 3012 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,007 psi | 42% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,964 psi | 72% | 2861 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,969 psi | 81% | 2959 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 48,022 psi | 72% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,713 psi | 63% | 2736 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 41,829 psi | 63% | 2828 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,653 psi | 59% | 2802 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,488 psi | 77% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,835 psi | 75% | 2897 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,851 psi | 49% | 2539 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 48,385 psi | 73% | 2904 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 34,679 psi | 52% | 2700 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 40,306 psi | 60% | 2808 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 49,385 psi | 74% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,698 psi | 63% | 2838 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 48,312 psi | 72% | 2910 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,751 psi | 52% | 2641 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 43% | 1804 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,024 psi | 76% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,153 psi | 74% | 2969 fps | 100% |
| ReloadSwiss RS 76 | 73.9 gr | 82% | 32,619 psi | 49% | 2651 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 46,398 psi | 70% | 2953 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 43,308 psi | 65% | 2779 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,553 psi | 62% | 2779 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,518 psi | 79% | 2933 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,488 psi | 77% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,835 psi | 75% | 2897 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,681 psi | 85% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,444 psi | 76% | 2851 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,220 psi | 62% | 2776 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 44,251 psi | 66% | 2766 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 46,833 psi | 70% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,221 psi | 63% | 2762 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 54,679 psi | 82% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,966 psi | 76% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,724 psi | 55% | 2631 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 50,241 psi | 75% | 2910 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,089 psi | 62% | 2772 fps | 99.9% |
| Vihtavuori N560 | 71.6 gr | 82% | 43,149 psi | 65% | 2861 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 88% | 43,918 psi | 66% | 2854 fps | 96% |
| Vihtavuori N568 | <<locked>> | 94% | 47,485 psi | 71% | 2966 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,183 psi | 75% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,460 psi | 79% | 2989 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,620 psi | 50% | 2720 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,711 psi | 58% | 2684 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 71 powders for 7 mm STW loaded with the .284 | 140gr | Sellier & Bellot FMJ. Hodgdon Retumbo delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,225 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 140gr | Sellier & Bellot FMJ 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.