Load Specifications
Load data in caliber 7 mm STW with .284 | 155gr | Federal Terminal Ascent Component 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 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>> | 92% | 57,841 psi | 87% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,494 psi | 88% | 2917 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,666 psi | 85% | 2989 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 90% | 59,335 psi | 89% | 2979 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 57,551 psi | 86% | 2992 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,564 psi | 83% | 2953 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,140 psi | 75% | 2917 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,437 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,856 psi | 88% | 2969 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,812 psi | 87% | 2986 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 59,117 psi | 89% | 2943 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 59,234 psi | 89% | 3015 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,057 psi | 84% | 2982 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,779 psi | 79% | 2969 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,552 psi | 88% | 2949 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 56,739 psi | 85% | 2966 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 59,001 psi | 88% | 3025 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 57,812 psi | 87% | 2986 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 59,944 psi | 90% | 2917 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,188 psi | 86% | 2976 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 59,930 psi | 90% | 2972 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,334 psi | 87% | 2930 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 56,898 psi | 85% | 2923 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,886 psi | 90% | 2969 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,683 psi | 89% | 2890 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,986 psi | 87% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,826 psi | 85% | 2949 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 56% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 58,247 psi | 87% | 2904 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,682 psi | 86% | 2887 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,639 psi | 88% | 2904 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,537 psi | 86% | 2907 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 94% | 59,611 psi | 89% | 3028 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,687 psi | 68% | 2825 fps | 98% |
| Lovex S065 | <<locked>> | 84% | 58,624 psi | 88% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,942 psi | 85% | 2881 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 59,088 psi | 89% | 2907 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,785 psi | 90% | 2966 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 46,195 psi | 69% | 2851 fps | 99.6% |
| Norma MRP | <<locked>> | 90% | 57,899 psi | 87% | 3005 fps | 100% |
| Norma URP | <<locked>> | 86% | 60,307 psi | 90% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,536 psi | 85% | 2989 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 59,451 psi | 89% | 2959 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,422 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 57% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,827 psi | 88% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 57,203 psi | 86% | 2966 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,146 psi | 89% | 3091 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,610 psi | 88% | 3051 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 90% | 60,118 psi | 90% | 2949 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 58,624 psi | 88% | 2959 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 59,944 psi | 90% | 2917 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,624 psi | 88% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,942 psi | 85% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,580 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 58,189 psi | 87% | 2956 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 57,986 psi | 87% | 2884 fps | 99% |
| Somchem S365 | <<locked>> | 86% | 57,740 psi | 87% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 59,030 psi | 88% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,566 psi | 88% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 58,291 psi | 87% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,624 psi | 88% | 2910 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 57,450 psi | 86% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,479 psi | 86% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,421 psi | 86% | 3002 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 57,899 psi | 87% | 2989 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 59,117 psi | 89% | 3051 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,028 psi | 84% | 3045 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,899 psi | 87% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 60,191 psi | 90% | 2976 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,740 psi | 88% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,987 psi | 88% | 2927 fps | 99.9% |
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% | 38,537 psi | 58% | 2566 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 51,169 psi | 77% | 2812 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 42,583 psi | 64% | 2733 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 42,395 psi | 64% | 2690 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 82% | 40,611 psi | 61% | 2680 fps | 96% |
| ADI AR 2217 | <<locked>> | 90% | 39,421 psi | 59% | 2651 fps | 96% |
| ADI AR 2225 | <<locked>> | 86% | 31,314 psi | 47% | 2490 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,718 psi | 73% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,525 psi | 64% | 2687 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,334 psi | 57% | 2628 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,101 psi | 56% | 2589 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,039 psi | 48% | 2503 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,437 psi | 62% | 2740 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,950 psi | 73% | 2900 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,428 psi | 73% | 2772 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 35,737 psi | 54% | 2566 fps | 95.5% |
| Bofors RP30 | <<locked>> | 86% | 36,463 psi | 55% | 2608 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 38,334 psi | 57% | 2628 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 52,808 psi | 79% | 2808 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 37,608 psi | 56% | 2612 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 52,504 psi | 79% | 2861 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 54,636 psi | 82% | 2871 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 40,553 psi | 61% | 2628 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,511 psi | 64% | 2671 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,948 psi | 69% | 2690 fps | 100% |
| Hodgdon Retumbo | 64.7 gr | 82% | 33,518 psi | 50% | 2589 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 52,895 psi | 79% | 2890 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 42% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,138 psi | 72% | 2743 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,085 psi | 81% | 2831 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,414 psi | 73% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,887 psi | 63% | 2628 fps | 95.9% |
| IMR 7828 SSC | <<locked>> | 82% | 39,204 psi | 59% | 2661 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 37,043 psi | 56% | 2638 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,750 psi | 78% | 2782 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,212 psi | 75% | 2776 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,199 psi | 50% | 2444 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 48,646 psi | 73% | 2789 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 32,489 psi | 49% | 2546 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 40,495 psi | 61% | 2700 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 49,777 psi | 75% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 39,088 psi | 59% | 2671 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 48,617 psi | 73% | 2795 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 32,430 psi | 49% | 2480 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 43% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,242 psi | 77% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,545 psi | 74% | 2854 fps | 100% |
| ReloadSwiss RS 76 | 69.2 gr | 82% | 32,663 psi | 49% | 2559 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 43,018 psi | 64% | 2779 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 43,642 psi | 65% | 2667 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 41,930 psi | 63% | 2674 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 52,808 psi | 79% | 2808 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,750 psi | 78% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,212 psi | 75% | 2776 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,676 psi | 76% | 2730 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,597 psi | 62% | 2667 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 44,527 psi | 67% | 2657 fps | 96.5% |
| Somchem S365 | <<locked>> | 80% | 47,050 psi | 71% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,366 psi | 64% | 2651 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 80% | 55,027 psi | 82% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 51,213 psi | 77% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,956 psi | 55% | 2530 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 50,444 psi | 76% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,394 psi | 62% | 2664 fps | 100% |
| Vihtavuori N560 | 65.5 gr | 80% | 40,437 psi | 61% | 2690 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 41,075 psi | 62% | 2687 fps | 96% |
| Vihtavuori N568 | <<locked>> | 92% | 44,237 psi | 66% | 2792 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 98% | 51,953 psi | 78% | 2972 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,386 psi | 76% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,736 psi | 79% | 2864 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,939 psi | 51% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,928 psi | 58% | 2579 fps | 96.8% |
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 | 155gr | Federal Terminal Ascent Component. Hodgdon Retumbo delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,097 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 155.0 gr projectile in 0.284" calls for a 1:9.0 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 155gr | Federal Terminal Ascent Component 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.