Load Specifications
Load data in caliber 7 mm STW with .284 | 170gr | Rhino Solid Shank bullet and 66 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 80 and Vihtavuori N570.
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% | 59,828 psi | 90% | 2805 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 60,336 psi | 90% | 2822 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 58,914 psi | 88% | 2917 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 57,203 psi | 86% | 2838 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 59,567 psi | 89% | 2910 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 58,102 psi | 87% | 2884 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,375 psi | 82% | 2930 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,695 psi | 85% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,377 psi | 86% | 2822 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,826 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 59,901 psi | 90% | 2900 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,754 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,044 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 58,827 psi | 88% | 2897 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,144 psi | 84% | 2917 fps | 98.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,619 psi | 77% | 2835 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 60,017 psi | 90% | 2871 fps | 98.8% |
| Bofors RP15 | <<locked>> | 92% | 59,045 psi | 89% | 2890 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,001 psi | 87% | 2897 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 59,901 psi | 90% | 2900 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 59,799 psi | 90% | 2904 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 58,537 psi | 88% | 2841 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,551 psi | 86% | 2828 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,638 psi | 86% | 2749 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,305 psi | 86% | 2966 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 57% | 1791 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 59,495 psi | 89% | 2812 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 60,263 psi | 90% | 2812 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 58,827 psi | 88% | 2822 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 57,798 psi | 87% | 2890 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,953 psi | 78% | 2825 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 59,553 psi | 89% | 2785 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,986 psi | 87% | 2785 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,653 psi | 86% | 2776 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,101 psi | 86% | 2815 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,156 psi | 80% | 2851 fps | 100% |
| Norma MRP | <<locked>> | 88% | 60,249 psi | 90% | 2917 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,044 psi | 87% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 59,205 psi | 89% | 2917 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,087 psi | 86% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,537 psi | 86% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,624 psi | 58% | 1834 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 59,234 psi | 89% | 2874 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 58,175 psi | 87% | 2953 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,464 psi | 86% | 2923 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 86% | 57,769 psi | 87% | 2808 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 56,652 psi | 85% | 2822 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 59,553 psi | 89% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,986 psi | 87% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 58,552 psi | 88% | 2743 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 60,104 psi | 90% | 2871 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 59,306 psi | 89% | 2799 fps | 99.7% |
| Somchem S365 | <<locked>> | 84% | 59,756 psi | 90% | 2805 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,826 psi | 85% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 59,756 psi | 90% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,768 psi | 85% | 2776 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 59,770 psi | 90% | 2854 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 82% | 58,900 psi | 88% | 2799 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 59,770 psi | 90% | 2835 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 59,582 psi | 89% | 2923 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 56,376 psi | 85% | 2854 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 96% | 57,885 psi | 87% | 2920 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 59,234 psi | 89% | 2986 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,219 psi | 89% | 2743 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,015 psi | 87% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,710 psi | 85% | 2789 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% | 42,743 psi | 64% | 2546 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 56,202 psi | 84% | 2769 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,353 psi | 66% | 2667 fps | 97.1% |
| ADI AR 2209 | <<locked>> | 80% | 46,847 psi | 70% | 2674 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 42,177 psi | 63% | 2615 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 84% | 35,882 psi | 54% | 2477 fps | 96% |
| ADI AR 2218 | <<locked>> | 96% | 47,021 psi | 70% | 2792 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 28,761 psi | 43% | 2329 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,882 psi | 81% | 2776 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,673 psi | 70% | 2661 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,902 psi | 64% | 2625 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,524 psi | 62% | 2562 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,969 psi | 54% | 2503 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,094 psi | 71% | 2726 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 44,686 psi | 67% | 2717 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,761 psi | 72% | 2769 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,627 psi | 65% | 2589 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 39,784 psi | 60% | 2559 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 33,417 psi | 50% | 2434 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 42,902 psi | 64% | 2625 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 34,142 psi | 51% | 2438 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 44,744 psi | 67% | 2615 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,005 psi | 66% | 2602 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,517 psi | 76% | 2651 fps | 100% |
| Hodgdon Retumbo | 64.9 gr | 80% | 35,114 psi | 53% | 2539 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 43% | 1604 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,460 psi | 79% | 2710 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,997 psi | 79% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,716 psi | 69% | 2608 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 40,785 psi | 61% | 2595 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 88% | 34,577 psi | 52% | 2480 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 55,941 psi | 84% | 2736 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 54,491 psi | 82% | 2736 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,883 psi | 55% | 2431 fps | 99.2% |
| Norma 204 | <<locked>> | 80% | 53,519 psi | 80% | 2762 fps | 99.9% |
| Norma 217 | <<locked>> | 84% | 30,240 psi | 45% | 2385 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 45,556 psi | 68% | 2690 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 54,389 psi | 82% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,857 psi | 61% | 2608 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 80% | 53,563 psi | 80% | 2759 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,695 psi | 55% | 2487 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,080 psi | 44% | 1644 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,172 psi | 83% | 2818 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,403 psi | 52% | 2516 fps | 98.4% |
| ReloadSwiss RS 80 | 75.3 gr | 86% | 39,392 psi | 59% | 2602 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 47,587 psi | 71% | 2644 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 46,456 psi | 70% | 2657 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,941 psi | 84% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 54,491 psi | 82% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,911 psi | 82% | 2694 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,108 psi | 69% | 2651 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 48,704 psi | 73% | 2638 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 52,301 psi | 78% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,862 psi | 70% | 2635 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 55,840 psi | 84% | 2740 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,785 psi | 61% | 2513 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 92% | 52,359 psi | 78% | 2736 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 55,317 psi | 83% | 2749 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,209 psi | 69% | 2638 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,252 psi | 68% | 2687 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 37,507 psi | 56% | 2510 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 86% | 40,567 psi | 61% | 2615 fps | 95.6% |
| Vihtavuori N570 | 77.5 gr | 92% | 47,819 psi | 72% | 2792 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 55,405 psi | 83% | 2694 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,755 psi | 60% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,062 psi | 65% | 2566 fps | 98.8% |
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 66 powders for 7 mm STW loaded with the .284 | 170gr | Rhino Solid Shank. Vihtavuori N570 delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,791 fps to 2,986 fps. ADI AR 2218 gives the best case fill at 100 %, and 66 of the 66 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 170.0 gr projectile in 0.284" calls for a 1:11.0 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. Hodgdon Retumbo, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for 7 mm STW with the .284 | 170gr | Rhino Solid Shank 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.