Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Nosler Partition bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N165, Vihtavuori N570 and Hodgdon Retumbo.
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>> | 88% | 56,971 psi | 85% | 2733 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 60,046 psi | 90% | 2894 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 58,146 psi | 87% | 2815 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,695 psi | 85% | 2831 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 59,277 psi | 89% | 2864 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,579 psi | 83% | 2920 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,986 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,494 psi | 88% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,696 psi | 86% | 2805 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,145 psi | 86% | 2825 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,030 psi | 88% | 2785 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 59,234 psi | 89% | 2858 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 60,046 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,261 psi | 86% | 2900 fps | 98.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,794 psi | 79% | 2825 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,203 psi | 86% | 2795 fps | 98.6% |
| Bofors RP15 | <<locked>> | 92% | 60,075 psi | 90% | 2867 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,943 psi | 88% | 2874 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,145 psi | 86% | 2825 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,898 psi | 85% | 2831 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,480 psi | 89% | 2822 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,523 psi | 88% | 2808 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,508 psi | 88% | 2720 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,624 psi | 88% | 2946 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,782 psi | 57% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 60,263 psi | 90% | 2785 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,566 psi | 86% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,669 psi | 89% | 2795 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 90% | 58,871 psi | 88% | 2871 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,142 psi | 80% | 2808 fps | 99.8% |
| Lovex S070 | <<locked>> | 82% | 59,016 psi | 88% | 2762 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,624 psi | 88% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,957 psi | 87% | 2792 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,215 psi | 81% | 2831 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,217 psi | 86% | 2841 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,103 psi | 89% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,333 psi | 84% | 2838 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,957 psi | 87% | 2785 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,784 psi | 88% | 2822 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,725 psi | 58% | 1808 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 60,249 psi | 90% | 2848 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,698 psi | 89% | 2936 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,842 psi | 88% | 2907 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 58,595 psi | 88% | 2785 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,595 psi | 86% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,016 psi | 88% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,306 psi | 89% | 2717 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,203 psi | 86% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 60,205 psi | 90% | 2779 fps | 99.8% |
| Somchem S365 | <<locked>> | 82% | 56,826 psi | 85% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,957 psi | 87% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,754 psi | 87% | 2753 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,869 psi | 85% | 2779 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 82% | 59,756 psi | 90% | 2772 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 57,217 psi | 86% | 2766 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,637 psi | 85% | 2844 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 57,479 psi | 86% | 2838 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 59,146 psi | 89% | 2907 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 96% | 56,405 psi | 85% | 2907 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 60,133 psi | 90% | 2717 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 59,408 psi | 89% | 2877 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,653 psi | 86% | 2766 fps | 100% |
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% | 43,671 psi | 65% | 2530 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,179 psi | 68% | 2651 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 80% | 47,572 psi | 71% | 2651 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,917 psi | 64% | 2598 fps | 98.1% |
| ADI AR 2217 | <<locked>> | 82% | 34,258 psi | 51% | 2408 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 94% | 44,715 psi | 67% | 2713 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 29,312 psi | 44% | 2320 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,723 psi | 82% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,558 psi | 71% | 2644 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,685 psi | 65% | 2605 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,453 psi | 64% | 2546 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,637 psi | 55% | 2487 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,051 psi | 72% | 2707 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 42,569 psi | 64% | 2644 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,353 psi | 68% | 2690 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,222 psi | 66% | 2572 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 40,640 psi | 61% | 2543 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 34,258 psi | 51% | 2425 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 43,685 psi | 65% | 2605 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 34,737 psi | 52% | 2421 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 45,469 psi | 68% | 2598 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,686 psi | 67% | 2582 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,459 psi | 77% | 2628 fps | 100% |
| Hodgdon Retumbo | 64.6 gr | 80% | 35,824 psi | 54% | 2530 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 43% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,142 psi | 80% | 2684 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,983 psi | 81% | 2690 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,340 psi | 69% | 2585 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 41,713 psi | 63% | 2582 fps | 97.9% |
| IMR 8133 Enduron | <<locked>> | 86% | 32,967 psi | 49% | 2411 fps | 95.1% |
| Lovex S070 | <<locked>> | 80% | 55,405 psi | 83% | 2713 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,652 psi | 56% | 2415 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 54,288 psi | 81% | 2740 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 28,979 psi | 43% | 2323 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 46,398 psi | 70% | 2674 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 55,419 psi | 83% | 2726 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,713 psi | 63% | 2592 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 80% | 54,389 psi | 82% | 2736 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,652 psi | 56% | 2477 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,124 psi | 44% | 1621 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 56,115 psi | 84% | 2795 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,157 psi | 53% | 2507 fps | 98.9% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,275 psi | 56% | 2523 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 48,472 psi | 73% | 2628 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 47,181 psi | 71% | 2635 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 55,405 psi | 83% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,564 psi | 83% | 2667 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,833 psi | 70% | 2631 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,414 psi | 74% | 2618 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 53,185 psi | 80% | 2684 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,616 psi | 71% | 2612 fps | 99.9% |
| Vihtavuori N165 | 64.3 gr | 80% | 41,611 psi | 62% | 2497 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 49,806 psi | 75% | 2664 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 56,115 psi | 84% | 2723 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,992 psi | 70% | 2615 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,050 psi | 69% | 2667 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 80% | 38,261 psi | 57% | 2493 fps | 96.5% |
| Vihtavuori N568 | <<locked>> | 84% | 38,580 psi | 58% | 2539 fps | 95.2% |
| Vihtavuori N570 | 75.5 gr | 90% | 45,498 psi | 68% | 2717 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 56,217 psi | 84% | 2671 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,770 psi | 61% | 2602 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,961 psi | 66% | 2549 fps | 99.1% |
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 62 powders for 7 mm STW loaded with the .284 | 175gr | Nosler Partition. Hodgdon Retumbo delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,946 fps. ADI AR 2218 gives the best case fill at 100 %, and 62 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Vihtavuori N165, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for 7 mm STW with the .284 | 175gr | Nosler Partition 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.