Load Specifications
Load data in caliber 7 mm STW with .284 | 139gr | Hornady SP 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 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 57,087 psi | 86% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,682 psi | 86% | 3048 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 59,915 psi | 90% | 3173 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 58,653 psi | 88% | 3110 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 56,681 psi | 85% | 3110 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,810 psi | 82% | 3071 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,443 psi | 74% | 3028 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,581 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 60,002 psi | 90% | 3117 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,117 psi | 87% | 3094 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,971 psi | 85% | 3107 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 58,349 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 58,305 psi | 87% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 59,495 psi | 89% | 3166 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,928 psi | 87% | 3068 fps | 96.8% |
| Bofors RP15 | <<locked>> | 96% | 60,031 psi | 90% | 3153 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,291 psi | 87% | 3146 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 56,971 psi | 85% | 3107 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 59,176 psi | 89% | 3045 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 56,637 psi | 85% | 3100 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 59,132 psi | 89% | 3100 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,696 psi | 86% | 3058 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 60,220 psi | 90% | 3107 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,059 psi | 89% | 3091 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,987 psi | 88% | 3025 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,116 psi | 86% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,188 psi | 84% | 3077 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 56% | 1972 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,595 psi | 86% | 3031 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,869 psi | 85% | 3012 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 57,943 psi | 87% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,971 psi | 85% | 3028 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 58,798 psi | 88% | 3153 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,846 psi | 67% | 2923 fps | 96.9% |
| Lovex S065 | <<locked>> | 84% | 57,856 psi | 87% | 3012 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,843 psi | 90% | 3064 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,276 psi | 87% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,929 psi | 88% | 3087 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 45,411 psi | 68% | 2956 fps | 99% |
| Norma MRP | <<locked>> | 90% | 57,130 psi | 86% | 3127 fps | 100% |
| Norma URP | <<locked>> | 86% | 59,625 psi | 89% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 60,133 psi | 90% | 3176 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 58,610 psi | 88% | 3087 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 58,784 psi | 88% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 57% | 2014 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,001 psi | 87% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,434 psi | 85% | 3097 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 58,595 psi | 88% | 3215 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,928 psi | 87% | 3163 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 90% | 59,567 psi | 89% | 3077 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 57,696 psi | 86% | 3084 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 59,176 psi | 89% | 3045 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,856 psi | 87% | 3012 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,843 psi | 90% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,785 psi | 90% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,087 psi | 86% | 2966 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,261 psi | 86% | 3077 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 60,350 psi | 90% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,421 psi | 86% | 3005 fps | 98.5% |
| Somchem S365 | <<locked>> | 86% | 56,884 psi | 85% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,218 psi | 87% | 3051 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 57,899 psi | 87% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,508 psi | 86% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,175 psi | 87% | 3035 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 56,739 psi | 85% | 3022 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,869 psi | 85% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,681 psi | 85% | 3123 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 57,159 psi | 86% | 3107 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 58,334 psi | 87% | 3166 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,188 psi | 86% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,335 psi | 89% | 3104 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,682 psi | 86% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,291 psi | 87% | 3048 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% | 37,884 psi | 57% | 2667 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 50,328 psi | 75% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,976 psi | 67% | 2904 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 41,713 psi | 63% | 2799 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 42,931 psi | 64% | 2854 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 41,785 psi | 63% | 2818 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 88% | 33,083 psi | 50% | 2644 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,877 psi | 72% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 55,753 psi | 84% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,843 psi | 63% | 2795 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,724 psi | 57% | 2730 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,332 psi | 54% | 2694 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,488 psi | 47% | 2598 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,640 psi | 61% | 2844 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,082 psi | 77% | 2943 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 37,565 psi | 56% | 2723 fps | 95.2% |
| Bofors RP30 | <<locked>> | 90% | 41,133 psi | 62% | 2828 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,724 psi | 57% | 2730 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 52,272 psi | 78% | 2936 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 39,827 psi | 60% | 2776 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 51,750 psi | 78% | 2982 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 54,012 psi | 81% | 2999 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 82% | 42,656 psi | 64% | 2792 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,976 psi | 67% | 2841 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,237 psi | 68% | 2815 fps | 100% |
| Hodgdon Retumbo | 72.1 gr | 86% | 37,797 psi | 57% | 2815 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 52,054 psi | 78% | 3009 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 42% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,500 psi | 71% | 2861 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,519 psi | 80% | 2959 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 47,514 psi | 71% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 44,135 psi | 66% | 2795 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 41,350 psi | 62% | 2825 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,901 psi | 63% | 2861 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 51,010 psi | 76% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,559 psi | 74% | 2897 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 32,561 psi | 49% | 2536 fps | 96.2% |
| Norma 204 | <<locked>> | 80% | 48,095 psi | 72% | 2904 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 34,214 psi | 51% | 2697 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 39,798 psi | 60% | 2805 fps | 97.6% |
| Norma URP | <<locked>> | 80% | 49,066 psi | 74% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,394 psi | 62% | 2838 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 48,008 psi | 72% | 2913 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,330 psi | 51% | 2638 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,459 psi | 76% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,617 psi | 73% | 2969 fps | 100% |
| ReloadSwiss RS 76 | 75.3 gr | 84% | 34,563 psi | 52% | 2717 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,847 psi | 69% | 2949 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 42,873 psi | 64% | 2776 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 41,263 psi | 62% | 2782 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 52,272 psi | 78% | 2936 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,010 psi | 76% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,559 psi | 74% | 2897 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,376 psi | 85% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,951 psi | 75% | 2851 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,915 psi | 61% | 2776 fps | 96.6% |
| Somchem S355 | <<locked>> | 80% | 56,550 psi | 85% | 2982 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,830 psi | 66% | 2762 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 46,267 psi | 69% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,771 psi | 63% | 2762 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 80% | 54,375 psi | 82% | 2904 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,444 psi | 76% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,303 psi | 54% | 2628 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 49,748 psi | 75% | 2910 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,770 psi | 61% | 2776 fps | 99.8% |
| Vihtavuori N560 | 71.3 gr | 82% | 42,656 psi | 64% | 2858 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 88% | 43,250 psi | 65% | 2848 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 46,934 psi | 70% | 2963 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,893 psi | 75% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,924 psi | 78% | 2986 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,199 psi | 50% | 2720 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,305 psi | 57% | 2680 fps | 95.7% |
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 | 139gr | Hornady SP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,219 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 139.0 gr projectile in 0.284" calls for a 1:12.0 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 139gr | Hornady SP 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.