Load Specifications
Load data in caliber 9 mm Steyr with .358 | 148gr | ACME WC.DBB LUBED bullet and 9 powders. The key underlying parameters are shown in the table above.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Herco² | <<locked>> | 68% | 16,099 psi | 82% | 915 fps | 97.6% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 72% | 17,114 psi | 87% | 889 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 13,924 psi | 71% | 784 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,807 psi | 65% | 787 fps | 100% |
| Rottweil P 806*² | <<locked>> | 72% | 15,780 psi | 81% | 1004 fps | 89.4% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 68% | 17,608 psi | 90% | 942 fps | 91.6% |
| Vihtavuori 3N37*² | <<locked>> | 64% | 17,579 psi | 90% | 965 fps | 92.9% |
| Vihtavuori N32C Tin Star² | <<locked>> | 76% | 16,404 psi | 84% | 817 fps | 100% |
| Vihtavuori N350*² | <<locked>> | 68% | 17,492 psi | 89% | 965 fps | 93.3% |
Start Load - Barrel Length: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Alliant Herco*² | <<locked>> | 60% | 12,836 psi | 66% | 833 fps | 94.7% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,285 psi | 63% | 787 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,599 psi | 34% | 581 fps | 99.4% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,382 psi | 33% | 584 fps | 96.4% |
| Rottweil P 806*² | <<locked>> | 68% | 13,924 psi | 71% | 958 fps | 86.9% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 13,779 psi | 70% | 850 fps | 87.2% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 15,766 psi | 81% | 925 fps | 91.1% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,747 psi | 55% | 705 fps | 100% |
| Vihtavuori N350*² | <<locked>> | 60% | 13,387 psi | 68% | 863 fps | 88.7% |
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 2 powders for 9 mm Steyr loaded with the .358 | 148gr | ACME WC.DBB LUBED. ReloadSwiss RS 14 delivers the highest muzzle velocity at 787 fps; across all powders the maximum-charge window runs from 784 fps to 787 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 2 of the 2 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (135 MPa), the top charges use 65–71 %, leaving at least 29 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14 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 TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.