Load Specifications
Load data in caliber 7 mm STW with .284 | 154gr | Hornady SP bullet and 71 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 IMR 7828 SSC.
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>> | 90% | 56,304 psi | 84% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,942 psi | 85% | 2907 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,335 psi | 89% | 3041 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 57,827 psi | 87% | 2969 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 60,118 psi | 90% | 3041 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,262 psi | 87% | 3005 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,852 psi | 79% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,856 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,334 psi | 86% | 2959 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 60,321 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,957 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,059 psi | 87% | 3005 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,030 psi | 88% | 3028 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,188 psi | 84% | 3031 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,956 psi | 85% | 2936 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 59,437 psi | 89% | 3018 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 57,914 psi | 87% | 3018 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 60,321 psi | 90% | 3031 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,204 psi | 87% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 60,205 psi | 90% | 3031 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,160 psi | 87% | 2959 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 60,365 psi | 90% | 2969 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,306 psi | 89% | 2972 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,088 psi | 87% | 2956 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,204 psi | 87% | 2884 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,087 psi | 86% | 3091 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,393 psi | 89% | 2999 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 56% | 1877 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 60,350 psi | 90% | 2946 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,437 psi | 89% | 2927 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,203 psi | 86% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,567 psi | 89% | 2949 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 58,175 psi | 87% | 3018 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,167 psi | 72% | 2874 fps | 98.6% |
| Lovex S065 | <<locked>> | 82% | 56,782 psi | 85% | 2871 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,943 psi | 88% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,943 psi | 87% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,001 psi | 87% | 2949 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 49,023 psi | 73% | 2904 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 56,405 psi | 85% | 2992 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,813 psi | 88% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 59,625 psi | 89% | 3045 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 57,885 psi | 87% | 2946 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,088 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 58% | 1919 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,101 psi | 86% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 59,756 psi | 90% | 3009 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,088 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,638 psi | 86% | 3041 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 58,537 psi | 88% | 2940 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 57,159 psi | 86% | 2949 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 58,204 psi | 87% | 2907 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,782 psi | 85% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,943 psi | 88% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,654 psi | 89% | 2877 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,753 psi | 85% | 2946 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 60,263 psi | 90% | 2930 fps | 99.4% |
| Somchem S365 | <<locked>> | 86% | 60,220 psi | 90% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,537 psi | 86% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,666 psi | 85% | 2877 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,392 psi | 86% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 59,625 psi | 89% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 60,104 psi | 90% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 59,930 psi | 90% | 3051 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 56,637 psi | 85% | 2976 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 98% | 58,030 psi | 87% | 3041 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,248 psi | 89% | 3104 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 60,278 psi | 90% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,407 psi | 88% | 2963 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,624 psi | 86% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,377 psi | 86% | 2913 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% | 40,292 psi | 60% | 2608 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 53,272 psi | 80% | 2854 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,510 psi | 62% | 2717 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 44,179 psi | 66% | 2736 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 39,595 psi | 59% | 2667 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 88% | 38,595 psi | 58% | 2641 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 30,734 psi | 46% | 2480 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,691 psi | 76% | 2851 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,237 psi | 66% | 2730 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,190 psi | 60% | 2677 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,798 psi | 58% | 2628 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,562 psi | 50% | 2552 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,729 psi | 66% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,095 psi | 72% | 2890 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,079 psi | 71% | 2759 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 37,275 psi | 56% | 2608 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 38,421 psi | 58% | 2657 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 40,190 psi | 60% | 2677 fps | 97.4% |
| Bofors RP7 | <<locked>> | 80% | 54,447 psi | 82% | 2848 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,724 psi | 55% | 2598 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 54,607 psi | 82% | 2904 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 56,710 psi | 85% | 2917 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 42,134 psi | 63% | 2674 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,437 psi | 62% | 2657 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,747 psi | 72% | 2730 fps | 100% |
| Hodgdon Retumbo | 65.8 gr | 80% | 32,750 psi | 49% | 2572 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 55,245 psi | 83% | 2936 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,181 psi | 42% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,879 psi | 75% | 2785 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,869 psi | 84% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,140 psi | 75% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,410 psi | 65% | 2671 fps | 96.6% |
| IMR 7828 SSC | 65.7 gr | 80% | 38,174 psi | 57% | 2644 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,550 psi | 55% | 2631 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 53,374 psi | 80% | 2818 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,808 psi | 78% | 2815 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,621 psi | 52% | 2484 fps | 98% |
| Norma 204 | <<locked>> | 80% | 50,589 psi | 76% | 2831 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 32,111 psi | 48% | 2539 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 42,453 psi | 64% | 2746 fps | 99% |
| Norma URP | <<locked>> | 80% | 51,503 psi | 77% | 2831 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,000 psi | 57% | 2651 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 50,589 psi | 76% | 2835 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,171 psi | 51% | 2533 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 43% | 1722 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,330 psi | 80% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,663 psi | 77% | 2894 fps | 100% |
| ReloadSwiss RS 76 | 70.4 gr | 80% | 31,908 psi | 48% | 2543 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,293 psi | 63% | 2769 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 45,121 psi | 68% | 2710 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 43,743 psi | 66% | 2720 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 80% | 54,447 psi | 82% | 2848 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,374 psi | 80% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,808 psi | 78% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,359 psi | 78% | 2769 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,410 psi | 65% | 2713 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 46,093 psi | 69% | 2700 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 49,168 psi | 74% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,237 psi | 66% | 2697 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 53,142 psi | 80% | 2828 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,522 psi | 58% | 2572 fps | 97.4% |
| Vihtavuori N550 | <<locked>> | 80% | 52,446 psi | 79% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,366 psi | 65% | 2707 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,293 psi | 63% | 2736 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 84% | 40,234 psi | 60% | 2674 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 43,410 psi | 65% | 2779 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 96% | 51,271 psi | 77% | 2969 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,359 psi | 78% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,607 psi | 82% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,230 psi | 54% | 2671 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,654 psi | 61% | 2625 fps | 97.5% |
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 71 powders for 7 mm STW loaded with the .284 | 154gr | Hornady SP. Vihtavuori N570 delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,104 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 154.0 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, 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, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 154gr | 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.