Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Barnes X S bullet and 72 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 Winchester StaBALL HD.
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>> | 90% | 56,768 psi | 85% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,000 psi | 85% | 3015 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 58,552 psi | 88% | 3133 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 88% | 56,898 psi | 85% | 3061 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 92% | 58,900 psi | 88% | 3130 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,159 psi | 86% | 3091 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,069 psi | 78% | 3058 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,116 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,623 psi | 85% | 3051 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 59,524 psi | 89% | 3127 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,421 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,913 psi | 85% | 3104 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 58,233 psi | 87% | 3133 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,940 psi | 82% | 3110 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 59,611 psi | 89% | 3074 fps | 97.1% |
| Bofors RP15 | <<locked>> | 94% | 58,653 psi | 88% | 3114 fps | 99.7% |
| Bofors RP30 | <<locked>> | 98% | 57,159 psi | 86% | 3110 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 59,524 psi | 89% | 3127 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 57,885 psi | 87% | 3005 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 58,914 psi | 88% | 3117 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 57,783 psi | 87% | 3058 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 59,828 psi | 90% | 3071 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 58,378 psi | 88% | 3058 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,479 psi | 86% | 3045 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,566 psi | 86% | 2986 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 59,611 psi | 89% | 3238 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,479 psi | 88% | 3094 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,623 psi | 56% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 59,611 psi | 89% | 3041 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,740 psi | 88% | 3022 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,000 psi | 85% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,016 psi | 88% | 3041 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 92% | 57,029 psi | 85% | 3107 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,718 psi | 72% | 2963 fps | 97.7% |
| Lovex S065 | <<locked>> | 84% | 60,350 psi | 90% | 3028 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,682 psi | 88% | 3025 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,088 psi | 87% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,276 psi | 86% | 3045 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 48,515 psi | 73% | 2999 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 59,553 psi | 89% | 3146 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,305 psi | 87% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,175 psi | 87% | 3130 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 57,203 psi | 86% | 3045 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,058 psi | 86% | 3061 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 58% | 2005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,768 psi | 85% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,668 psi | 88% | 3110 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,884 psi | 85% | 3173 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,652 psi | 85% | 3130 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 88% | 57,812 psi | 87% | 3028 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 60,205 psi | 90% | 3100 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,885 psi | 87% | 3005 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 60,350 psi | 90% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,682 psi | 88% | 3025 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,437 psi | 89% | 2976 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 59,756 psi | 90% | 3094 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 59,683 psi | 89% | 3018 fps | 98.7% |
| Somchem S365 | <<locked>> | 86% | 59,567 psi | 89% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,276 psi | 86% | 3015 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 60,336 psi | 90% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 60,017 psi | 90% | 3031 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,782 psi | 85% | 2995 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 59,234 psi | 89% | 3035 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 59,843 psi | 90% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,972 psi | 88% | 3140 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 96% | 60,118 psi | 90% | 3130 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 57,072 psi | 86% | 3130 fps | 97.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,001 psi | 87% | 3186 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 59,422 psi | 89% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,783 psi | 87% | 3058 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,333 psi | 84% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,753 psi | 85% | 3005 fps | 99.5% |
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% | 41,278 psi | 62% | 2720 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 53,490 psi | 80% | 2963 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 44,556 psi | 67% | 2877 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 43,961 psi | 66% | 2825 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 42,424 psi | 64% | 2822 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 41,466 psi | 62% | 2789 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 86% | 33,576 psi | 50% | 2641 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,212 psi | 75% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,135 psi | 66% | 2822 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,379 psi | 61% | 2772 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,204 psi | 59% | 2736 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,098 psi | 51% | 2651 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,685 psi | 65% | 2890 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 51,242 psi | 77% | 3041 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 52,736 psi | 79% | 2956 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 37,797 psi | 57% | 2710 fps | 95.4% |
| Bofors RP30 | <<locked>> | 86% | 38,711 psi | 58% | 2756 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 40,379 psi | 61% | 2772 fps | 96.4% |
| Bofors RP7 | <<locked>> | 80% | 54,505 psi | 82% | 2949 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 39,595 psi | 59% | 2749 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 54,186 psi | 81% | 3002 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 56,086 psi | 84% | 3009 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 45,020 psi | 67% | 2822 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 44,324 psi | 66% | 2808 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,834 psi | 72% | 2838 fps | 100% |
| Hodgdon Retumbo | 67.3 gr | 82% | 35,592 psi | 53% | 2736 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 54,534 psi | 82% | 3031 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 42% | 1755 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,603 psi | 74% | 2877 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,332 psi | 83% | 2969 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 50,386 psi | 76% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,395 psi | 65% | 2759 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 82% | 41,017 psi | 61% | 2799 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,552 psi | 59% | 2792 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 53,606 psi | 80% | 2927 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,083 psi | 78% | 2917 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 35,853 psi | 54% | 2598 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 50,183 psi | 75% | 2923 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 34,998 psi | 52% | 2700 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 42,496 psi | 64% | 2848 fps | 98.3% |
| Norma URP | <<locked>> | 80% | 51,503 psi | 77% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 41,089 psi | 62% | 2812 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 50,285 psi | 75% | 2933 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 34,722 psi | 52% | 2631 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,993 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,142 psi | 80% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,169 psi | 77% | 2995 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 32,764 psi | 49% | 2644 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 45,513 psi | 68% | 2930 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 45,252 psi | 68% | 2802 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,845 psi | 66% | 2815 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 80% | 54,505 psi | 82% | 2949 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,606 psi | 80% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,083 psi | 78% | 2917 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,417 psi | 79% | 2867 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,497 psi | 65% | 2812 fps | 97.4% |
| Somchem S361 | <<locked>> | 80% | 46,282 psi | 69% | 2792 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 49,066 psi | 74% | 2894 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,599 psi | 67% | 2795 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 80% | 56,724 psi | 85% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,808 psi | 79% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,914 psi | 58% | 2667 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 52,359 psi | 78% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,859 psi | 66% | 2815 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,250 psi | 63% | 2828 fps | 95% |
| Vihtavuori N565 | <<locked>> | 86% | 43,526 psi | 65% | 2835 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 46,485 psi | 70% | 2936 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 98% | 54,157 psi | 81% | 3117 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,083 psi | 78% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,360 psi | 81% | 3005 fps | 99.9% |
| Winchester StaBALL HD | 67.4 gr | 80% | 36,158 psi | 54% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,886 psi | 61% | 2717 fps | 96.6% |
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 72 powders for 7 mm STW loaded with the .284 | 140gr | Barnes X S. Hodgdon Retumbo delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,238 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 140gr | Barnes X S 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.