Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Winchester Powerpoint bullet and 74 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>> | 92% | 58,842 psi | 88% | 3031 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 59,422 psi | 89% | 3064 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 56,797 psi | 85% | 3130 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 90% | 57,682 psi | 86% | 3130 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 88% | 56,463 psi | 85% | 3068 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 58,668 psi | 88% | 3136 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,884 psi | 85% | 3097 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,372 psi | 77% | 3051 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,666 psi | 85% | 3064 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 60,365 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 59,828 psi | 90% | 3110 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 58,943 psi | 88% | 3127 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,550 psi | 85% | 3041 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,594 psi | 85% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,348 psi | 86% | 3127 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,621 psi | 82% | 3110 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 59,553 psi | 89% | 3087 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 58,088 psi | 87% | 3114 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 60,278 psi | 90% | 3166 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 58,943 psi | 88% | 3127 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 56,913 psi | 85% | 3005 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 58,494 psi | 88% | 3123 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 56,913 psi | 85% | 3058 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 59,248 psi | 89% | 3074 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 57,885 psi | 87% | 3064 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,753 psi | 85% | 3048 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,724 psi | 85% | 2986 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 59,480 psi | 89% | 3248 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,001 psi | 87% | 3097 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 56% | 1972 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 59,045 psi | 89% | 3048 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,334 psi | 87% | 3028 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 59,553 psi | 89% | 3051 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,450 psi | 88% | 3048 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 92% | 56,782 psi | 85% | 3114 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,847 psi | 70% | 2953 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 59,161 psi | 89% | 3025 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,609 psi | 86% | 3025 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 60,263 psi | 90% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,579 psi | 85% | 3048 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 47,369 psi | 71% | 2979 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 58,929 psi | 88% | 3146 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,377 psi | 86% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,769 psi | 87% | 3133 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 56,405 psi | 85% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,536 psi | 85% | 3064 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,290 psi | 57% | 2018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 59,669 psi | 89% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,363 psi | 87% | 3114 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,652 psi | 85% | 3176 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,927 psi | 84% | 3123 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 88% | 57,174 psi | 86% | 3031 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 59,451 psi | 89% | 3100 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 56,913 psi | 85% | 3005 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 59,161 psi | 89% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,609 psi | 86% | 3025 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,508 psi | 88% | 2982 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 59,030 psi | 88% | 3100 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 59,045 psi | 89% | 3025 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 58,697 psi | 88% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 59,901 psi | 90% | 3071 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 59,292 psi | 89% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 59,117 psi | 89% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 59,814 psi | 90% | 3051 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 58,479 psi | 88% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 58,566 psi | 88% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,450 psi | 88% | 3143 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 96% | 59,277 psi | 89% | 3130 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 56,463 psi | 85% | 3127 fps | 98% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,493 psi | 86% | 3182 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 58,798 psi | 88% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,145 psi | 86% | 3061 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 60,176 psi | 90% | 3179 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 60,147 psi | 90% | 3068 fps | 99.8% |
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% | 39,117 psi | 59% | 2687 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 51,837 psi | 78% | 2949 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 42,728 psi | 64% | 2861 fps | 96.1% |
| Accurate MAGPRO | <<locked>> | 84% | 46,572 psi | 70% | 2927 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 42,989 psi | 64% | 2818 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 41,350 psi | 62% | 2812 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 40,277 psi | 60% | 2776 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 86% | 31,937 psi | 48% | 2602 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,468 psi | 65% | 2818 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,429 psi | 74% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,062 psi | 65% | 2812 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,957 psi | 58% | 2753 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,681 psi | 56% | 2710 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,561 psi | 49% | 2618 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,279 psi | 63% | 2867 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,444 psi | 76% | 3035 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 52,431 psi | 79% | 2966 fps | 95.8% |
| Bofors RP15 | <<locked>> | 82% | 38,812 psi | 58% | 2746 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 39,856 psi | 60% | 2792 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 38,957 psi | 58% | 2753 fps | 96.1% |
| Bofors RP7 | <<locked>> | 80% | 53,374 psi | 80% | 2949 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 38,305 psi | 57% | 2733 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 53,301 psi | 80% | 3002 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 55,361 psi | 83% | 3015 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 44,019 psi | 66% | 2815 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 43,308 psi | 65% | 2799 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,644 psi | 70% | 2828 fps | 100% |
| Hodgdon Retumbo | 72 gr | 84% | 36,521 psi | 55% | 2772 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 53,795 psi | 81% | 3031 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 42% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,747 psi | 73% | 2877 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,752 psi | 82% | 2972 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 48,878 psi | 73% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,424 psi | 64% | 2753 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 42,757 psi | 64% | 2851 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 40,640 psi | 61% | 2825 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 52,315 psi | 78% | 2920 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,662 psi | 76% | 2910 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 33,605 psi | 50% | 2559 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 49,342 psi | 74% | 2923 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 33,214 psi | 50% | 2657 fps | 95% |
| Norma MRP | <<locked>> | 80% | 41,321 psi | 62% | 2828 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 50,256 psi | 75% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,711 psi | 60% | 2792 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 49,327 psi | 74% | 2930 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 35,737 psi | 54% | 2667 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 43% | 1811 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,069 psi | 78% | 2972 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,256 psi | 75% | 2989 fps | 100% |
| ReloadSwiss RS 76 | 75.2 gr | 82% | 33,344 psi | 50% | 2674 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 44,324 psi | 66% | 2907 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 44,077 psi | 66% | 2795 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 42,554 psi | 64% | 2802 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 53,374 psi | 80% | 2949 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,315 psi | 78% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,662 psi | 76% | 2910 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,198 psi | 77% | 2867 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,221 psi | 63% | 2795 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 45,034 psi | 68% | 2782 fps | 96% |
| Somchem S365 | <<locked>> | 80% | 47,790 psi | 72% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,018 psi | 64% | 2779 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 55,550 psi | 83% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,822 psi | 78% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,434 psi | 56% | 2648 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 51,242 psi | 77% | 2930 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,148 psi | 63% | 2795 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 44,121 psi | 66% | 2881 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 86% | 41,872 psi | 63% | 2812 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 45,455 psi | 68% | 2923 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 53,563 psi | 80% | 3114 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,285 psi | 77% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,301 psi | 80% | 3002 fps | 99.8% |
| Winchester StaBALL HD | 70.4 gr | 80% | 34,737 psi | 52% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,436 psi | 59% | 2697 fps | 96.2% |
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 74 powders for 7 mm STW loaded with the .284 | 140gr | Winchester Powerpoint. Hodgdon Retumbo delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,248 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 1:15.0 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 | Winchester Powerpoint 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.