Load Specifications
Load data in caliber 7 mm STW with .277 | 140gr | Federal Trophy Bonded bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC 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>> | 94% | 56,768 psi | 85% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,914 psi | 87% | 3038 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 59,466 psi | 89% | 3153 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 82% | 58,247 psi | 87% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 58,813 psi | 88% | 3094 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 56,536 psi | 85% | 3094 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,763 psi | 76% | 2982 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,513 psi | 68% | 2943 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 59,770 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,508 psi | 88% | 3091 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 60,060 psi | 90% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,044 psi | 87% | 3077 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,666 psi | 85% | 3091 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,798 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,580 psi | 86% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,842 psi | 88% | 3156 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,117 psi | 87% | 3045 fps | 96.4% |
| Bofors RP15 | <<locked>> | 98% | 59,466 psi | 89% | 3133 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,461 psi | 80% | 3061 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 56,666 psi | 85% | 3091 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 59,727 psi | 90% | 3038 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,304 psi | 84% | 3081 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 86% | 59,408 psi | 89% | 3091 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 58,117 psi | 87% | 3045 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 56,376 psi | 85% | 3028 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 94% | 59,132 psi | 89% | 3074 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 58,914 psi | 88% | 3009 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,260 psi | 84% | 3196 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 56,246 psi | 84% | 3064 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 56% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,827 psi | 87% | 3018 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,508 psi | 86% | 3005 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 58,131 psi | 87% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,334 psi | 86% | 3018 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 58,349 psi | 87% | 3133 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 58,291 psi | 87% | 3002 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 60,234 psi | 90% | 3054 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,783 psi | 87% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 88% | 59,393 psi | 89% | 3081 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 41,118 psi | 62% | 2864 fps | 97.8% |
| Norma MRP | <<locked>> | 92% | 56,681 psi | 85% | 3114 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 59,857 psi | 90% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 59,538 psi | 89% | 3156 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 58,871 psi | 88% | 3077 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 58,102 psi | 87% | 3084 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 57% | 1982 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 59,712 psi | 90% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,001 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,217 psi | 84% | 3084 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,537 psi | 86% | 3192 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,402 psi | 79% | 3068 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 57,450 psi | 86% | 2982 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 59,625 psi | 89% | 3061 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 57,682 psi | 86% | 3071 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 59,727 psi | 90% | 3038 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,291 psi | 87% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 60,234 psi | 90% | 3054 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 59,117 psi | 89% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,145 psi | 86% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,624 psi | 86% | 2956 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,232 psi | 86% | 3064 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 56,971 psi | 85% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,841 psi | 87% | 2992 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 56,550 psi | 85% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,175 psi | 87% | 3038 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 58,508 psi | 88% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,914 psi | 87% | 3012 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,986 psi | 87% | 3018 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 57,014 psi | 85% | 3012 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 60,234 psi | 90% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,420 psi | 85% | 3107 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 56,434 psi | 85% | 3084 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,316 psi | 80% | 3074 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,653 psi | 86% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 59,669 psi | 89% | 3094 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,173 psi | 84% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 58,421 psi | 88% | 3035 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% | 35,172 psi | 53% | 2595 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 47,036 psi | 71% | 2867 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 48,167 psi | 72% | 2959 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 54,563 psi | 82% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,030 psi | 59% | 2726 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 42,917 psi | 64% | 2838 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 41,437 psi | 62% | 2795 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 34,853 psi | 52% | 2684 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 56,188 psi | 84% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,788 psi | 67% | 2871 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,040 psi | 78% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,204 psi | 59% | 2723 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,478 psi | 56% | 2720 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,649 psi | 50% | 2625 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,269 psi | 44% | 2520 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,202 psi | 56% | 2766 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,679 psi | 82% | 2989 fps | 95.6% |
| Bofors RP15 | <<locked>> | 86% | 39,871 psi | 60% | 2772 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 40,379 psi | 61% | 2808 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 37,478 psi | 56% | 2720 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 49,371 psi | 74% | 2867 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 39,711 psi | 60% | 2759 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 48,573 psi | 73% | 2913 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 51,126 psi | 77% | 2930 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,788 psi | 69% | 2844 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,034 psi | 68% | 2828 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,293 psi | 63% | 2749 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,405 psi | 56% | 2795 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 48,530 psi | 73% | 2936 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,833 psi | 42% | 1739 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,788 psi | 67% | 2795 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,705 psi | 76% | 2894 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 44,686 psi | 67% | 2808 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,280 psi | 66% | 2782 fps | 95.4% |
| IMR 7828 SSC | 69 gr | 88% | 44,164 psi | 66% | 2877 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 48,327 psi | 72% | 2841 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 46,731 psi | 70% | 2831 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 32,343 psi | 48% | 2526 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,005 psi | 67% | 2831 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 35,810 psi | 54% | 2736 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 36,724 psi | 55% | 2726 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 45,992 psi | 69% | 2851 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 41,104 psi | 62% | 2822 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 44,875 psi | 67% | 2841 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 36,811 psi | 55% | 2690 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 43% | 1778 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 55,405 psi | 83% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,108 psi | 71% | 2884 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,092 psi | 68% | 2897 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,345 psi | 51% | 2700 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,846 psi | 67% | 2927 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 53,940 psi | 81% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,120 psi | 65% | 2766 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 38,464 psi | 58% | 2707 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 49,371 psi | 74% | 2867 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,327 psi | 72% | 2841 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 46,731 psi | 70% | 2831 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,361 psi | 83% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,693 psi | 80% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,355 psi | 71% | 2785 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,130 psi | 57% | 2703 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 53,563 psi | 80% | 2927 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,121 psi | 66% | 2753 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 42,960 psi | 64% | 2805 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,175 psi | 59% | 2694 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 51,358 psi | 77% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,456 psi | 71% | 2844 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,172 psi | 54% | 2615 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 46,760 psi | 70% | 2844 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,884 psi | 57% | 2707 fps | 99.4% |
| Vihtavuori N560 | 70.1 gr | 86% | 45,658 psi | 68% | 2913 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 42,844 psi | 64% | 2831 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 49,617 psi | 74% | 3009 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,644 psi | 70% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,805 psi | 73% | 2917 fps | 99.2% |
| Winchester StaBALL HD | 64.5 gr | 80% | 30,008 psi | 45% | 2635 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,334 psi | 57% | 2671 fps | 95.3% |
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 77 powders for 7 mm STW loaded with the .277 | 140gr | Federal Trophy Bonded. Hodgdon Retumbo delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,196 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 1:8.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, IMR 7828 SSC, Vihtavuori N560 rank at the top here: for 7 mm STW with the .277 | 140gr | Federal Trophy Bonded 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.