Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Speer Deep Curl Soft Point bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 58,015 psi | 87% | 2749 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,782 psi | 85% | 2851 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 86% | 58,972 psi | 88% | 2828 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,493 psi | 86% | 2844 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 60,278 psi | 90% | 2881 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,826 psi | 85% | 2943 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 59,263 psi | 89% | 2897 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,248 psi | 89% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,523 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,928 psi | 87% | 2838 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,901 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 60,307 psi | 90% | 2871 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,768 psi | 85% | 2831 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,653 psi | 88% | 2920 fps | 98.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,056 psi | 81% | 2844 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,972 psi | 87% | 2808 fps | 98.8% |
| Bofors RP15 | <<locked>> | 90% | 57,348 psi | 86% | 2828 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 60,191 psi | 90% | 2894 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,928 psi | 87% | 2838 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,885 psi | 87% | 2844 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,463 psi | 85% | 2779 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,263 psi | 89% | 2822 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,422 psi | 89% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,785 psi | 90% | 2963 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 57% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,450 psi | 86% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,233 psi | 87% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,753 psi | 85% | 2759 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 60,002 psi | 90% | 2887 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,045 psi | 89% | 2762 fps | 96% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,331 psi | 81% | 2828 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,596 psi | 89% | 2772 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,683 psi | 89% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,755 psi | 88% | 2808 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,477 psi | 83% | 2848 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,262 psi | 87% | 2854 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,770 psi | 90% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,435 psi | 86% | 2854 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,769 psi | 88% | 2799 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 60,031 psi | 90% | 2841 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 58% | 1814 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,362 psi | 84% | 2890 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 60,046 psi | 90% | 2923 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 59,379 psi | 89% | 2799 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,436 psi | 88% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,596 psi | 89% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 60,031 psi | 90% | 2730 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,044 psi | 87% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,232 psi | 86% | 2740 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 57,812 psi | 87% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,740 psi | 88% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,697 psi | 88% | 2769 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,870 psi | 87% | 2795 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 86% | 58,131 psi | 87% | 2779 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,667 psi | 86% | 2861 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 58,697 psi | 88% | 2854 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 60,350 psi | 90% | 2923 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 96% | 57,609 psi | 86% | 2927 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,333 psi | 84% | 2835 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,639 psi | 88% | 2782 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% | 44,295 psi | 66% | 2543 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,963 psi | 69% | 2667 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 80% | 48,385 psi | 73% | 2667 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,511 psi | 65% | 2612 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 34,751 psi | 52% | 2421 fps | 96% |
| ADI AR 2218 | <<locked>> | 94% | 45,411 psi | 68% | 2730 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 29,892 psi | 45% | 2339 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,463 psi | 83% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,167 psi | 72% | 2657 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,280 psi | 66% | 2615 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,120 psi | 65% | 2556 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,405 psi | 56% | 2503 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,950 psi | 73% | 2720 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,381 psi | 65% | 2661 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,601 psi | 70% | 2713 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,047 psi | 63% | 2530 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 41,263 psi | 62% | 2556 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 34,867 psi | 52% | 2438 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 44,280 psi | 66% | 2615 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 35,375 psi | 53% | 2438 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 46,195 psi | 69% | 2612 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,266 psi | 68% | 2595 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,185 psi | 78% | 2638 fps | 100% |
| Hodgdon Retumbo | 65.6 gr | 80% | 36,550 psi | 55% | 2546 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 43% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,983 psi | 81% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,636 psi | 82% | 2700 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,079 psi | 71% | 2602 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 42,337 psi | 63% | 2595 fps | 98.1% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,405 psi | 83% | 2707 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,663 psi | 50% | 2428 fps | 95.5% |
| Lovex S070 | <<locked>> | 80% | 56,028 psi | 84% | 2726 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,290 psi | 57% | 2428 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 55,129 psi | 83% | 2753 fps | 100% |
| Norma 217 | <<locked>> | 82% | 29,501 psi | 44% | 2336 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 47,253 psi | 71% | 2687 fps | 100% |
| Norma URP | <<locked>> | 80% | 56,101 psi | 84% | 2740 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,569 psi | 64% | 2608 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 80% | 55,201 psi | 83% | 2753 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,261 psi | 57% | 2490 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 44% | 1624 fps | 100% |
| ReloadSwiss RS 76 | 70.2 gr | 80% | 35,810 psi | 54% | 2523 fps | 99.1% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,174 psi | 57% | 2543 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 49,037 psi | 74% | 2638 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 47,834 psi | 72% | 2648 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 56,028 psi | 84% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,420 psi | 85% | 2680 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,485 psi | 71% | 2644 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 50,082 psi | 75% | 2631 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 54,143 psi | 81% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,211 psi | 72% | 2625 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,192 psi | 63% | 2510 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 90% | 50,604 psi | 76% | 2680 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 47,877 psi | 72% | 2631 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,862 psi | 70% | 2684 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 38,986 psi | 58% | 2510 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 39,276 psi | 59% | 2556 fps | 95.5% |
| Vihtavuori N570 | 76.6 gr | 90% | 46,456 psi | 70% | 2736 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,742 psi | 63% | 2618 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,512 psi | 67% | 2559 fps | 99.3% |
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 60 powders for 7 mm STW loaded with the .284 | 175gr | Speer Deep Curl Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,963 fps. ADI AR 2218 gives the best case fill at 100 %, and 60 of the 60 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 1:11.5 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 175gr | Speer Deep Curl Soft Point 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.