Load Specifications
Load data in caliber 7 mm STW with .284 | 195gr | Berger Elite Hunter bullet and 58 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 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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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% | 58,914 psi | 88% | 2621 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 45,658 psi | 68% | 2539 fps | 96.4% |
| Accurate MAGPRO | <<locked>> | 86% | 57,870 psi | 87% | 2730 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 86% | 60,046 psi | 90% | 2700 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 58,552 psi | 88% | 2723 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 57,305 psi | 86% | 2703 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,464 psi | 86% | 2825 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 60,336 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 60,191 psi | 90% | 2674 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 59,379 psi | 89% | 2690 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,972 psi | 88% | 2713 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,087 psi | 86% | 2621 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,334 psi | 86% | 2690 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,798 psi | 87% | 2703 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 59,611 psi | 89% | 2805 fps | 99.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,940 psi | 82% | 2736 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,610 psi | 88% | 2684 fps | 99.3% |
| Bofors RP15 | <<locked>> | 90% | 58,131 psi | 87% | 2703 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 57,290 psi | 86% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 58,972 psi | 88% | 2713 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 59,001 psi | 88% | 2720 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,479 psi | 86% | 2657 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 60,249 psi | 90% | 2694 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 60,263 psi | 90% | 2598 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,695 psi | 85% | 2779 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,884 psi | 57% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,189 psi | 87% | 2618 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 59,292 psi | 89% | 2618 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,682 psi | 86% | 2635 fps | 100% |
| IMR 7828 SSC | <<locked>> | 88% | 57,087 psi | 86% | 2707 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,930 psi | 90% | 2641 fps | 96.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,216 psi | 83% | 2707 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 56,927 psi | 85% | 2595 fps | 100% |
| Norma 204 | <<locked>> | 82% | 59,712 psi | 90% | 2677 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,521 psi | 85% | 2726 fps | 100% |
| Norma MRP | <<locked>> | 86% | 59,219 psi | 89% | 2726 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 58,363 psi | 87% | 2726 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 59,741 psi | 90% | 2671 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 56,608 psi | 85% | 2661 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,899 psi | 58% | 1703 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,566 psi | 86% | 2769 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,753 psi | 85% | 2746 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 60,321 psi | 90% | 2671 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 59,248 psi | 89% | 2684 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 47,761 psi | 72% | 2552 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,856 psi | 88% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,957 psi | 87% | 2615 fps | 99.9% |
| Somchem S365 | <<locked>> | 82% | 58,711 psi | 88% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 59,451 psi | 89% | 2651 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 59,553 psi | 89% | 2641 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 58,668 psi | 88% | 2677 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 86% | 58,885 psi | 88% | 2644 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 58,537 psi | 88% | 2736 fps | 100% |
| Vihtavuori N565 | <<locked>> | 92% | 59,422 psi | 89% | 2730 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 57,246 psi | 86% | 2746 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 96% | 58,595 psi | 88% | 2808 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,638 psi | 86% | 2710 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 59,480 psi | 89% | 2654 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% | 45,078 psi | 68% | 2428 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 42,496 psi | 64% | 2480 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 80% | 46,891 psi | 70% | 2559 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 80% | 49,182 psi | 74% | 2546 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 44,425 psi | 67% | 2503 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 33,199 psi | 50% | 2274 fps | 96.5% |
| ADI AR 2218 | <<locked>> | 90% | 40,089 psi | 60% | 2500 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 30,530 psi | 46% | 2254 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 56,391 psi | 85% | 2628 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,950 psi | 73% | 2539 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,179 psi | 68% | 2507 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,976 psi | 66% | 2441 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,189 psi | 57% | 2398 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,908 psi | 75% | 2598 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 41,104 psi | 62% | 2500 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 92% | 40,886 psi | 61% | 2490 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,656 psi | 64% | 2425 fps | 96.3% |
| Bofors RP15 | <<locked>> | 80% | 42,148 psi | 63% | 2451 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 35,607 psi | 53% | 2343 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 45,179 psi | 68% | 2507 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 35,955 psi | 54% | 2343 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 46,905 psi | 70% | 2497 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,093 psi | 69% | 2484 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,982 psi | 79% | 2513 fps | 100% |
| Hodgdon Retumbo | 61.6 gr | 80% | 37,362 psi | 56% | 2448 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 43% | 1486 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,708 psi | 82% | 2572 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 55,448 psi | 83% | 2572 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,718 psi | 72% | 2484 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 43,236 psi | 65% | 2487 fps | 99% |
| IMR 7977 Enduron | <<locked>> | 90% | 52,591 psi | 79% | 2536 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,140 psi | 48% | 2283 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 38,972 psi | 58% | 2323 fps | 99.9% |
| Norma 204 | <<locked>> | 80% | 55,811 psi | 84% | 2628 fps | 100% |
| Norma 217 | <<locked>> | 80% | 28,253 psi | 42% | 2198 fps | 96.5% |
| Norma MRP | <<locked>> | 80% | 48,066 psi | 72% | 2569 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,555 psi | 65% | 2503 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 80% | 55,898 psi | 84% | 2621 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 39,059 psi | 59% | 2388 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,182 psi | 44% | 1522 fps | 100% |
| ReloadSwiss RS 76 | 65.9 gr | 80% | 36,564 psi | 55% | 2425 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 33,431 psi | 50% | 2323 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 49,893 psi | 75% | 2523 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 48,805 psi | 73% | 2533 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 44,527 psi | 67% | 2497 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,472 psi | 73% | 2530 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 50,720 psi | 76% | 2513 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 55,013 psi | 82% | 2566 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 49,081 psi | 74% | 2507 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,931 psi | 64% | 2398 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 44,918 psi | 67% | 2461 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 48,617 psi | 73% | 2507 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,659 psi | 71% | 2569 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 39,755 psi | 60% | 2411 fps | 98% |
| Vihtavuori N568 | <<locked>> | 82% | 37,347 psi | 56% | 2402 fps | 96% |
| Vihtavuori N570 | 68.7 gr | 86% | 40,988 psi | 61% | 2507 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,627 psi | 64% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,237 psi | 68% | 2448 fps | 99.7% |
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 58 powders for 7 mm STW loaded with the .284 | 195gr | Berger Elite Hunter. ADI AR 2218 delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,825 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 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 195.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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, Vihtavuori N570 rank at the top here: for 7 mm STW with the .284 | 195gr | Berger Elite Hunter 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.