Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | NorthFork Bonded Core bullet and 73 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% | 56,434 psi | 85% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,101 psi | 86% | 3028 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 59,379 psi | 89% | 3156 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 58,204 psi | 87% | 3091 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 60,220 psi | 90% | 3156 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,360 psi | 81% | 3051 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,008 psi | 73% | 3012 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,015 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 59,466 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,711 psi | 87% | 3077 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,333 psi | 84% | 3087 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,914 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,653 psi | 86% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,842 psi | 88% | 3150 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,551 psi | 86% | 3048 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 59,495 psi | 89% | 3133 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,537 psi | 86% | 3127 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 56,333 psi | 84% | 3087 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 58,914 psi | 88% | 3031 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 60,147 psi | 90% | 3143 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 58,653 psi | 88% | 3084 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,174 psi | 86% | 3041 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 59,683 psi | 89% | 3091 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,436 psi | 88% | 3071 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,465 psi | 88% | 3009 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,536 psi | 85% | 3199 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 60,046 psi | 90% | 3123 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 56% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,145 psi | 86% | 3015 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 60,162 psi | 90% | 3054 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,435 psi | 86% | 3022 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 60,205 psi | 90% | 3071 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 58,160 psi | 87% | 3136 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,324 psi | 66% | 2907 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 57,377 psi | 86% | 2995 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,393 psi | 89% | 3048 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,885 psi | 87% | 3018 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,508 psi | 88% | 3074 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 44,875 psi | 67% | 2936 fps | 98.9% |
| Norma MRP | <<locked>> | 90% | 56,478 psi | 85% | 3110 fps | 100% |
| Norma URP | <<locked>> | 86% | 59,103 psi | 89% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 59,509 psi | 89% | 3159 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 58,204 psi | 87% | 3071 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 58,015 psi | 87% | 3084 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 57% | 2005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,305 psi | 86% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 60,089 psi | 90% | 3140 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,856 psi | 87% | 3196 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,246 psi | 86% | 3146 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 90% | 58,958 psi | 88% | 3058 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 57,232 psi | 86% | 3068 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 58,914 psi | 88% | 3031 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,377 psi | 86% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,393 psi | 89% | 3048 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,451 psi | 89% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 60,350 psi | 90% | 3002 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,811 psi | 85% | 3061 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 59,799 psi | 90% | 3018 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,116 psi | 86% | 2992 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 60,205 psi | 90% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,798 psi | 87% | 3038 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 57,624 psi | 86% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,014 psi | 85% | 3002 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,595 psi | 86% | 3018 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 60,133 psi | 90% | 3061 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,901 psi | 90% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 60,118 psi | 90% | 3169 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 56,594 psi | 85% | 3087 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,624 psi | 86% | 3146 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,811 psi | 85% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,871 psi | 88% | 3087 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,927 psi | 85% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,943 psi | 87% | 3035 fps | 99.6% |
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% | 37,405 psi | 56% | 2651 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 49,763 psi | 75% | 2913 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,570 psi | 67% | 2887 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 41,437 psi | 62% | 2785 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 42,554 psi | 64% | 2835 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 92% | 41,278 psi | 62% | 2799 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 32,634 psi | 49% | 2625 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,514 psi | 71% | 2920 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 55,434 psi | 83% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,394 psi | 62% | 2776 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,434 psi | 56% | 2717 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,013 psi | 54% | 2677 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,256 psi | 47% | 2582 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,161 psi | 60% | 2828 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,662 psi | 76% | 2927 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 37,260 psi | 56% | 2710 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 40,756 psi | 61% | 2812 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 37,434 psi | 56% | 2717 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 51,750 psi | 78% | 2920 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 39,334 psi | 59% | 2756 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 51,430 psi | 77% | 2966 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 53,693 psi | 80% | 2982 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 45,310 psi | 68% | 2838 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,556 psi | 67% | 2825 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,831 psi | 67% | 2799 fps | 100% |
| Hodgdon Retumbo | 71.2 gr | 86% | 37,434 psi | 56% | 2799 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 51,619 psi | 77% | 2992 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 42% | 1759 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,210 psi | 71% | 2848 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,185 psi | 80% | 2946 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 47,181 psi | 71% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,729 psi | 66% | 2776 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 40,915 psi | 61% | 2808 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,394 psi | 62% | 2844 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 50,676 psi | 76% | 2887 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 49,052 psi | 74% | 2881 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 32,256 psi | 48% | 2523 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 47,630 psi | 71% | 2887 fps | 98% |
| Norma 217 | <<locked>> | 92% | 33,881 psi | 51% | 2680 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 39,334 psi | 59% | 2785 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 48,530 psi | 73% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,814 psi | 61% | 2815 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 47,543 psi | 71% | 2894 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 36,724 psi | 55% | 2694 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,966 psi | 75% | 2933 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,124 psi | 72% | 2953 fps | 100% |
| ReloadSwiss RS 76 | 74.4 gr | 84% | 34,243 psi | 51% | 2700 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,136 psi | 68% | 2930 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 42,598 psi | 64% | 2762 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 40,770 psi | 61% | 2762 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 51,750 psi | 78% | 2920 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,676 psi | 76% | 2887 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 49,052 psi | 74% | 2881 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,043 psi | 84% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,719 psi | 75% | 2838 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,466 psi | 61% | 2756 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 56,159 psi | 84% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,453 psi | 65% | 2746 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 45,919 psi | 69% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,510 psi | 62% | 2746 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,853 psi | 81% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,937 psi | 75% | 2894 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,897 psi | 54% | 2612 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 49,487 psi | 74% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,393 psi | 61% | 2759 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 42,235 psi | 63% | 2838 fps | 95% |
| Vihtavuori N565 | <<locked>> | 88% | 42,888 psi | 64% | 2835 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 46,456 psi | 70% | 2946 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,487 psi | 74% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,430 psi | 77% | 2966 fps | 99.7% |
| Winchester StaBALL HD | 68 gr | 80% | 32,677 psi | 49% | 2703 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,869 psi | 57% | 2664 fps | 95.5% |
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 73 powders for 7 mm STW loaded with the .284 | 140gr | NorthFork Bonded Core. Hodgdon Retumbo delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,199 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 1:11.0 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, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 140gr | NorthFork Bonded Core 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.