Load Specifications
Load data in caliber 7 mm STW with .284 | 180gr | Berger Hybrid Target 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, Vihtavuori N570 and ReloadSwiss RS 76.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 56,971 psi | 85% | 2697 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 59,756 psi | 90% | 2858 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 86% | 58,044 psi | 87% | 2779 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,492 psi | 85% | 2795 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 59,161 psi | 89% | 2828 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,376 psi | 83% | 2884 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,725 psi | 87% | 2844 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 58,276 psi | 87% | 2776 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,450 psi | 88% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,653 psi | 86% | 2769 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,942 psi | 85% | 2789 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,813 psi | 88% | 2746 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 59,176 psi | 89% | 2818 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 59,727 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,000 psi | 85% | 2864 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,518 psi | 79% | 2789 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,029 psi | 85% | 2759 fps | 98.7% |
| Bofors RP15 | <<locked>> | 92% | 59,988 psi | 90% | 2828 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,769 psi | 88% | 2838 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,942 psi | 85% | 2789 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,666 psi | 85% | 2792 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,582 psi | 89% | 2785 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,334 psi | 87% | 2769 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,523 psi | 88% | 2684 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,349 psi | 87% | 2907 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,797 psi | 57% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 60,162 psi | 90% | 2746 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,377 psi | 86% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,654 psi | 89% | 2762 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 90% | 58,740 psi | 88% | 2831 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,247 psi | 87% | 2710 fps | 95.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,011 psi | 79% | 2776 fps | 99.9% |
| Lovex S065 | <<locked>> | 82% | 60,249 psi | 90% | 2720 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,769 psi | 88% | 2723 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,711 psi | 88% | 2720 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,841 psi | 87% | 2756 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,085 psi | 81% | 2792 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,043 psi | 86% | 2805 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,856 psi | 88% | 2736 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,188 psi | 84% | 2802 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,841 psi | 87% | 2749 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,653 psi | 88% | 2785 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 58% | 1778 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 60,002 psi | 90% | 2808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,379 psi | 89% | 2897 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,450 psi | 88% | 2871 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 58,508 psi | 88% | 2746 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 57,493 psi | 86% | 2762 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 60,249 psi | 90% | 2720 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,769 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,292 psi | 89% | 2680 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,116 psi | 86% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 60,104 psi | 90% | 2743 fps | 99.9% |
| Somchem S365 | <<locked>> | 82% | 56,826 psi | 85% | 2694 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,682 psi | 86% | 2730 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,609 psi | 86% | 2717 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,753 psi | 85% | 2743 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 82% | 59,611 psi | 89% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 57,101 psi | 86% | 2726 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,478 psi | 85% | 2808 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 57,508 psi | 86% | 2802 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 58,929 psi | 88% | 2867 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 96% | 56,101 psi | 84% | 2867 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,901 psi | 90% | 2677 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 59,103 psi | 89% | 2835 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,508 psi | 86% | 2730 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% | 43,613 psi | 65% | 2497 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,107 psi | 68% | 2618 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 47,529 psi | 71% | 2615 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,699 psi | 64% | 2562 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 34,113 psi | 51% | 2375 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 94% | 44,498 psi | 67% | 2680 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 29,298 psi | 44% | 2293 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,979 psi | 72% | 2618 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,607 psi | 82% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,529 psi | 71% | 2612 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,482 psi | 65% | 2569 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,351 psi | 63% | 2510 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,593 psi | 55% | 2457 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,964 psi | 72% | 2671 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 42,279 psi | 63% | 2608 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,223 psi | 68% | 2661 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,437 psi | 62% | 2484 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 40,582 psi | 61% | 2510 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 34,229 psi | 51% | 2398 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 43,482 psi | 65% | 2569 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 34,737 psi | 52% | 2395 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 80% | 45,455 psi | 68% | 2566 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,498 psi | 67% | 2549 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,343 psi | 77% | 2592 fps | 100% |
| Hodgdon Retumbo | 63.2 gr | 80% | 35,766 psi | 54% | 2497 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 43% | 1555 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,113 psi | 80% | 2648 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,940 psi | 81% | 2654 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,311 psi | 69% | 2552 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 41,495 psi | 62% | 2549 fps | 98% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,505 psi | 82% | 2654 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 32,866 psi | 49% | 2382 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 56,782 psi | 85% | 2674 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 55,361 psi | 83% | 2677 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,507 psi | 56% | 2382 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 54,114 psi | 81% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 82% | 28,935 psi | 43% | 2297 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 46,267 psi | 69% | 2638 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,317 psi | 83% | 2690 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,756 psi | 63% | 2562 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 80% | 54,215 psi | 81% | 2700 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,405 psi | 56% | 2444 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,124 psi | 44% | 1591 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 56,043 psi | 84% | 2759 fps | 100% |
| ReloadSwiss RS 76 | 67.6 gr | 80% | 34,940 psi | 52% | 2474 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,188 psi | 56% | 2493 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 48,414 psi | 73% | 2592 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 47,137 psi | 71% | 2602 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 56,782 psi | 85% | 2674 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 55,361 psi | 83% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,579 psi | 83% | 2631 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,789 psi | 70% | 2598 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,356 psi | 74% | 2585 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 53,098 psi | 80% | 2644 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,413 psi | 71% | 2575 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,611 psi | 62% | 2464 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 49,603 psi | 74% | 2628 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 55,898 psi | 84% | 2684 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,905 psi | 70% | 2582 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,934 psi | 69% | 2635 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 38,247 psi | 57% | 2464 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 38,406 psi | 58% | 2510 fps | 95.5% |
| Vihtavuori N570 | 73.8 gr | 90% | 45,266 psi | 68% | 2680 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 55,956 psi | 84% | 2631 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,596 psi | 61% | 2569 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,787 psi | 66% | 2516 fps | 99.2% |
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 | 180gr | Berger Hybrid Target. Hodgdon Retumbo delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,736 fps to 2,907 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 180.0 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. Hodgdon Retumbo, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 180gr | Berger Hybrid Target 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.