Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Speer TBBC bullet and 65 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% | 56,565 psi | 85% | 2726 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 59,379 psi | 89% | 2884 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 57,696 psi | 86% | 2808 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 60,278 psi | 90% | 2884 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 58,682 psi | 88% | 2858 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,129 psi | 83% | 2913 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,363 psi | 86% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,986 psi | 87% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,305 psi | 86% | 2799 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,710 psi | 85% | 2822 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,349 psi | 87% | 2776 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 58,813 psi | 88% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 59,364 psi | 89% | 2867 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,739 psi | 85% | 2890 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,257 psi | 78% | 2815 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,695 psi | 85% | 2785 fps | 98.5% |
| Bofors RP15 | <<locked>> | 92% | 59,698 psi | 89% | 2861 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,552 psi | 88% | 2871 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,710 psi | 85% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,289 psi | 84% | 2822 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,103 psi | 89% | 2815 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,131 psi | 87% | 2802 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,059 psi | 87% | 2717 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,928 psi | 87% | 2936 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,768 psi | 57% | 1765 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 59,901 psi | 90% | 2779 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,130 psi | 86% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,306 psi | 89% | 2792 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 58,494 psi | 88% | 2864 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,547 psi | 79% | 2799 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 60,075 psi | 90% | 2753 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,581 psi | 88% | 2756 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,233 psi | 87% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,551 psi | 86% | 2785 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,824 psi | 81% | 2825 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,811 psi | 85% | 2835 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,624 psi | 88% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 60,017 psi | 90% | 2890 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,566 psi | 86% | 2782 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,421 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,696 psi | 58% | 1804 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 59,814 psi | 90% | 2844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,016 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,276 psi | 87% | 2897 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 58,204 psi | 87% | 2779 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,174 psi | 86% | 2792 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 60,075 psi | 90% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,581 psi | 88% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,132 psi | 89% | 2713 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,782 psi | 85% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 59,872 psi | 90% | 2772 fps | 99.8% |
| Somchem S365 | <<locked>> | 84% | 60,234 psi | 90% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,580 psi | 86% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 60,176 psi | 90% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,363 psi | 86% | 2746 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 60,321 psi | 90% | 2828 fps | 97.6% |
| Vihtavuori N550 | <<locked>> | 82% | 59,335 psi | 89% | 2766 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 60,365 psi | 90% | 2805 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 60,278 psi | 90% | 2897 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 92% | 57,087 psi | 86% | 2831 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 58,595 psi | 88% | 2897 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 98% | 60,017 psi | 90% | 2963 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,756 psi | 90% | 2710 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,653 psi | 88% | 2867 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,290 psi | 86% | 2759 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% | 43,250 psi | 65% | 2523 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,788 psi | 67% | 2644 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 80% | 47,355 psi | 71% | 2644 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 42,525 psi | 64% | 2592 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 33,968 psi | 51% | 2402 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 94% | 44,266 psi | 66% | 2700 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 29,153 psi | 44% | 2313 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,447 psi | 82% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,181 psi | 71% | 2638 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,265 psi | 65% | 2595 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,003 psi | 63% | 2536 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,419 psi | 55% | 2484 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,616 psi | 71% | 2700 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,281 psi | 68% | 2697 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 44,860 psi | 67% | 2684 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,961 psi | 66% | 2566 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 40,248 psi | 60% | 2536 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 33,895 psi | 51% | 2415 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 43,265 psi | 65% | 2595 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 34,418 psi | 52% | 2415 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 45,063 psi | 68% | 2589 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,324 psi | 66% | 2575 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,024 psi | 76% | 2621 fps | 100% |
| Hodgdon Retumbo | 64.2 gr | 80% | 35,592 psi | 53% | 2523 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,326 psi | 42% | 1578 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,982 psi | 79% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,519 psi | 80% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,180 psi | 69% | 2582 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 41,278 psi | 62% | 2575 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 34,998 psi | 52% | 2464 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 56,420 psi | 85% | 2703 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 54,969 psi | 82% | 2707 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,260 psi | 56% | 2405 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 53,896 psi | 81% | 2733 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 28,631 psi | 43% | 2313 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 45,992 psi | 69% | 2664 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 54,955 psi | 82% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,292 psi | 62% | 2585 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 53,969 psi | 81% | 2733 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,304 psi | 56% | 2470 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 44% | 1614 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,666 psi | 83% | 2789 fps | 100% |
| ReloadSwiss RS 76 | 68.7 gr | 80% | 34,795 psi | 52% | 2497 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 36,941 psi | 55% | 2516 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 48,066 psi | 72% | 2621 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 46,775 psi | 70% | 2628 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 56,420 psi | 85% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 54,969 psi | 82% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,405 psi | 83% | 2664 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,427 psi | 70% | 2625 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 49,081 psi | 74% | 2612 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 52,881 psi | 79% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,210 psi | 71% | 2605 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 56,405 psi | 85% | 2713 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 41,263 psi | 62% | 2490 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 49,284 psi | 74% | 2654 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 55,680 psi | 83% | 2717 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,746 psi | 70% | 2612 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,658 psi | 68% | 2661 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 38,043 psi | 57% | 2490 fps | 96.4% |
| Vihtavuori N568 | <<locked>> | 84% | 38,203 psi | 57% | 2533 fps | 95% |
| Vihtavuori N570 | 74.9 gr | 90% | 44,947 psi | 67% | 2703 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 55,854 psi | 84% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,263 psi | 60% | 2595 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,569 psi | 65% | 2543 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 72 powders for 7 mm STW loaded with the .284 | 175gr | Speer TBBC. Vihtavuori N570 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,963 fps. Accurate 8700 gives the best case fill at 100 %, and 72 of the 72 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. 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, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 175gr | Speer TBBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, Lovex D100, Ramshot LRT burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.