Load Specifications
Load data in caliber 7 mm STW with .284 | 185gr | Nosler RDF bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-23, 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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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>> | 88% | 57,827 psi | 87% | 2674 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 59,669 psi | 89% | 2828 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,594 psi | 85% | 2776 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 58,798 psi | 88% | 2753 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,377 psi | 86% | 2772 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 59,988 psi | 90% | 2805 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,275 psi | 84% | 2867 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,958 psi | 88% | 2825 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 59,059 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,161 psi | 89% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,421 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,812 psi | 87% | 2766 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,712 psi | 90% | 2723 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 60,002 psi | 90% | 2792 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,695 psi | 85% | 2759 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,291 psi | 87% | 2848 fps | 99% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,548 psi | 80% | 2772 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,638 psi | 86% | 2733 fps | 99% |
| Bofors RP15 | <<locked>> | 90% | 57,246 psi | 86% | 2756 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 59,814 psi | 90% | 2818 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,812 psi | 87% | 2766 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,711 psi | 87% | 2772 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,492 psi | 85% | 2710 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,146 psi | 89% | 2746 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,248 psi | 89% | 2657 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,277 psi | 89% | 2884 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,753 psi | 57% | 1713 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,290 psi | 86% | 2674 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,305 psi | 87% | 2674 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,652 psi | 85% | 2687 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 59,712 psi | 90% | 2812 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,798 psi | 88% | 2687 fps | 96.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,867 psi | 81% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 59,640 psi | 89% | 2700 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,567 psi | 89% | 2694 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,813 psi | 88% | 2733 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,013 psi | 82% | 2772 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,986 psi | 87% | 2779 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,828 psi | 90% | 2713 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,985 psi | 85% | 2776 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,827 psi | 88% | 2726 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,741 psi | 90% | 2766 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,725 psi | 58% | 1752 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,188 psi | 84% | 2818 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 59,727 psi | 90% | 2851 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 59,205 psi | 89% | 2723 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,305 psi | 87% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,640 psi | 89% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,930 psi | 90% | 2654 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,914 psi | 87% | 2733 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,956 psi | 85% | 2667 fps | 99.8% |
| Somchem S365 | <<locked>> | 82% | 57,609 psi | 86% | 2667 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,494 psi | 88% | 2707 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,421 psi | 88% | 2694 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,479 psi | 86% | 2723 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 86% | 57,914 psi | 87% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,363 psi | 86% | 2785 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 58,233 psi | 87% | 2779 fps | 100% |
| Vihtavuori N568 | <<locked>> | 96% | 60,075 psi | 90% | 2851 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 96% | 57,305 psi | 86% | 2854 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 60,336 psi | 90% | 2812 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,349 psi | 87% | 2707 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% | 44,237 psi | 66% | 2477 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 48,486 psi | 73% | 2654 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 80% | 45,818 psi | 69% | 2602 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 80% | 48,341 psi | 72% | 2595 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 43,511 psi | 65% | 2549 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 80% | 32,416 psi | 49% | 2306 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 92% | 42,163 psi | 63% | 2602 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,733 psi | 45% | 2280 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,559 psi | 73% | 2595 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,535 psi | 83% | 2684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,109 psi | 72% | 2589 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,295 psi | 66% | 2552 fps | 99.5% |
| Alliant Reloder-23 | 61.1 gr | 80% | 42,975 psi | 64% | 2487 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,362 psi | 56% | 2441 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,863 psi | 73% | 2651 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,163 psi | 65% | 2595 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 94% | 42,786 psi | 64% | 2582 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,916 psi | 63% | 2464 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 41,176 psi | 62% | 2493 fps | 98.9% |
| Bofors RP30 | <<locked>> | 80% | 34,824 psi | 52% | 2382 fps | 96.7% |
| Bofors RP5 | <<locked>> | 80% | 44,295 psi | 66% | 2552 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 80% | 35,244 psi | 53% | 2379 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 80% | 46,050 psi | 69% | 2543 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,266 psi | 68% | 2530 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,185 psi | 78% | 2569 fps | 100% |
| Hodgdon Retumbo | 62.8 gr | 80% | 36,376 psi | 55% | 2484 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,456 psi | 43% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,940 psi | 81% | 2625 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,563 psi | 82% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,007 psi | 70% | 2533 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 42,322 psi | 63% | 2533 fps | 98.4% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,230 psi | 83% | 2638 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,504 psi | 50% | 2369 fps | 96% |
| Lovex S070 | <<locked>> | 80% | 55,927 psi | 84% | 2651 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,189 psi | 57% | 2365 fps | 99.8% |
| Norma 204 | <<locked>> | 80% | 54,810 psi | 82% | 2677 fps | 100% |
| Norma 217 | <<locked>> | 80% | 27,572 psi | 41% | 2231 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 47,007 psi | 70% | 2615 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,985 psi | 84% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,482 psi | 64% | 2546 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 80% | 54,926 psi | 82% | 2674 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,247 psi | 57% | 2431 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,211 psi | 44% | 1568 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,737 psi | 54% | 2461 fps | 99.4% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 35,172 psi | 53% | 2418 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 48,950 psi | 73% | 2569 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 47,761 psi | 72% | 2579 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 55,927 psi | 84% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,173 psi | 84% | 2605 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,413 psi | 71% | 2575 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 49,980 psi | 75% | 2562 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 54,027 psi | 81% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,225 psi | 72% | 2556 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,163 psi | 63% | 2444 fps | 99.5% |
| Vihtavuori N170 | <<locked>> | 88% | 46,992 psi | 70% | 2556 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 47,747 psi | 72% | 2559 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,644 psi | 70% | 2615 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 80% | 38,870 psi | 58% | 2448 fps | 97.2% |
| Vihtavuori N568 | <<locked>> | 82% | 36,477 psi | 55% | 2438 fps | 95% |
| Vihtavuori N570 | 71.7 gr | 88% | 42,873 psi | 64% | 2602 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,423 psi | 62% | 2549 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,367 psi | 67% | 2493 fps | 99.4% |
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 62 powders for 7 mm STW loaded with the .284 | 185gr | Nosler RDF. Hodgdon Retumbo delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,884 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 185.0 gr projectile in 0.284" calls for a 1:9.0 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. Alliant Reloder-23, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for 7 mm STW with the .284 | 185gr | Nosler RDF 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.