Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Barnes Solid 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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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% | 59,277 psi | 89% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 60,191 psi | 90% | 2897 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 58,175 psi | 87% | 2976 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 56,985 psi | 85% | 2907 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 59,016 psi | 88% | 2972 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,319 psi | 86% | 2943 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,808 psi | 78% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,101 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,565 psi | 85% | 2894 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 59,292 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,174 psi | 86% | 2877 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,101 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,972 psi | 87% | 2969 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,737 psi | 82% | 2963 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 59,741 psi | 90% | 2930 fps | 98.1% |
| Bofors RP15 | <<locked>> | 94% | 58,421 psi | 88% | 2956 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 56,913 psi | 85% | 2956 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 59,292 psi | 89% | 2966 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,508 psi | 86% | 2841 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 58,958 psi | 88% | 2966 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 57,595 psi | 86% | 2897 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 59,756 psi | 90% | 2907 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 58,436 psi | 88% | 2910 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,232 psi | 86% | 2890 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,305 psi | 86% | 2818 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 60,002 psi | 90% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,479 psi | 88% | 2936 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 56% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 59,698 psi | 89% | 2884 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,755 psi | 88% | 2861 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 60,234 psi | 90% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,929 psi | 88% | 2887 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 57,319 psi | 86% | 2956 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,166 psi | 71% | 2815 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 59,785 psi | 90% | 2858 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,102 psi | 87% | 2861 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,072 psi | 86% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,159 psi | 86% | 2887 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 47,790 psi | 72% | 2838 fps | 99.8% |
| Norma MRP | <<locked>> | 90% | 59,408 psi | 89% | 2986 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,972 psi | 87% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,552 psi | 88% | 2979 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 56,985 psi | 85% | 2884 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,855 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,348 psi | 57% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 60,263 psi | 90% | 2920 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,958 psi | 88% | 2949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,811 psi | 85% | 3015 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,260 psi | 84% | 2976 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 57,725 psi | 87% | 2877 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 59,988 psi | 90% | 2940 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,508 psi | 86% | 2841 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 59,785 psi | 90% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,102 psi | 87% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,900 psi | 88% | 2815 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 59,553 psi | 89% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 59,408 psi | 89% | 2867 fps | 99.4% |
| Somchem S365 | <<locked>> | 86% | 59,408 psi | 89% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,536 psi | 85% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 59,944 psi | 90% | 2795 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 59,828 psi | 90% | 2867 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 60,220 psi | 90% | 2890 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 59,306 psi | 89% | 2910 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 84% | 58,914 psi | 88% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 59,219 psi | 89% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,914 psi | 88% | 2986 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 96% | 59,451 psi | 89% | 2972 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 56,768 psi | 85% | 2976 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,044 psi | 87% | 3038 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 59,393 psi | 89% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,595 psi | 86% | 2897 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,420 psi | 85% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,594 psi | 85% | 2854 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% | 39,595 psi | 59% | 2552 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 52,417 psi | 79% | 2789 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 40,872 psi | 61% | 2661 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 43,642 psi | 65% | 2677 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 39,030 psi | 59% | 2612 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 37,927 psi | 57% | 2582 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 30,226 psi | 45% | 2428 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,154 psi | 75% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,540 psi | 65% | 2671 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,566 psi | 59% | 2621 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,189 psi | 57% | 2572 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,098 psi | 50% | 2500 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,815 psi | 64% | 2726 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 47,065 psi | 71% | 2828 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 46,456 psi | 70% | 2703 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 36,753 psi | 55% | 2556 fps | 96.3% |
| Bofors RP30 | <<locked>> | 84% | 35,201 psi | 53% | 2543 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 39,566 psi | 59% | 2621 fps | 97.4% |
| Bofors RP7 | <<locked>> | 80% | 53,867 psi | 81% | 2789 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,172 psi | 54% | 2546 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 53,722 psi | 81% | 2838 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 56,028 psi | 84% | 2854 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 41,539 psi | 62% | 2615 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,843 psi | 61% | 2602 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,282 psi | 71% | 2677 fps | 100% |
| Hodgdon Retumbo | 63.2 gr | 80% | 32,198 psi | 48% | 2516 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 54,201 psi | 81% | 2874 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 42% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,371 psi | 74% | 2726 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,347 psi | 83% | 2812 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,559 psi | 74% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,960 psi | 64% | 2615 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 37,710 psi | 57% | 2592 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 92% | 35,955 psi | 54% | 2579 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 52,779 psi | 79% | 2759 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,256 psi | 77% | 2756 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,156 psi | 51% | 2434 fps | 98% |
| Norma 204 | <<locked>> | 80% | 50,009 psi | 75% | 2772 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 31,430 psi | 47% | 2484 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 41,684 psi | 62% | 2687 fps | 99% |
| Norma URP | <<locked>> | 80% | 50,923 psi | 76% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,420 psi | 56% | 2598 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 49,966 psi | 75% | 2779 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,562 psi | 50% | 2477 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 43% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,504 psi | 79% | 2812 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,894 psi | 76% | 2831 fps | 100% |
| ReloadSwiss RS 76 | 67.7 gr | 80% | 31,401 psi | 47% | 2490 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,379 psi | 62% | 2710 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 44,614 psi | 67% | 2654 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,018 psi | 64% | 2657 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 80% | 53,867 psi | 81% | 2789 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,779 psi | 79% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,256 psi | 77% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,677 psi | 77% | 2710 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,685 psi | 64% | 2654 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 45,498 psi | 68% | 2641 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 48,530 psi | 73% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,598 psi | 65% | 2641 fps | 99% |
| Vihtavuori N150 | <<locked>> | 80% | 56,159 psi | 84% | 2749 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,402 psi | 79% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,927 psi | 57% | 2516 fps | 97.4% |
| Vihtavuori N170 | <<locked>> | 96% | 55,506 psi | 83% | 2851 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 51,764 psi | 78% | 2769 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,743 psi | 64% | 2651 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,568 psi | 62% | 2677 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 39,436 psi | 59% | 2615 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 42,540 psi | 64% | 2723 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 96% | 50,140 psi | 75% | 2904 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,735 psi | 78% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,954 psi | 81% | 2844 fps | 100% |
| Winchester StaBALL HD | 65 gr | 80% | 35,505 psi | 53% | 2618 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,914 psi | 60% | 2566 fps | 97.4% |
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 | 160gr | Barnes Solid. Hodgdon Retumbo delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,084 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 160.0 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, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 160gr | Barnes Solid 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.