Load Specifications
Load data in caliber 9 mm Steyr with .358 | 105gr | LEE Mold 358-105-SWC bullet and 18 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N32C Tin Star and Hodgdon TrailBoss.
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 |
|---|---|---|---|---|---|---|
| Accurate Solo 1250² | <<locked>> | 64% | 15,809 psi | 81% | 1093 fps | 98.2% |
| Alliant BE-86² | <<locked>> | 64% | 15,679 psi | 80% | 1096 fps | 99.5% |
| Alliant Herco* | <<locked>> | 80% | 16,607 psi | 85% | 1152 fps | 94% |
| Alliant UNIQUE*² | <<locked>> | 68% | 17,158 psi | 88% | 1168 fps | 94.3% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 80% | 16,607 psi | 85% | 1109 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 17,492 psi | 89% | 1145 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,588 psi | 54% | 912 fps | 100% |
| Maxam CSB 1² | <<locked>> | 68% | 16,288 psi | 83% | 1102 fps | 98.6% |
| Maxam CSB 2² | <<locked>> | 68% | 16,534 psi | 84% | 1145 fps | 100% |
| Maxam CSB 3² | <<locked>> | 64% | 17,332 psi | 89% | 1115 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,166 psi | 47% | 886 fps | 97% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 17,695 psi | 90% | 1201 fps | 97% |
| SNPE Vectan A0*² | <<locked>> | 68% | 17,172 psi | 88% | 1122 fps | 94.1% |
| Somchem MS200*² | <<locked>> | 64% | 16,462 psi | 84% | 1119 fps | 94.8% |
| Vihtavuori N32C Tin Star | <<locked>> | 92% | 17,231 psi | 88% | 1066 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 17,521 psi | 89% | 1171 fps | 99.8% |
| Vihtavuori N340² | <<locked>> | 68% | 17,521 psi | 89% | 1155 fps | 95% |
| Winchester AutoComp ² | <<locked>> | 68% | 16,868 psi | 86% | 1132 fps | 98.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate Solo 1250² | <<locked>> | 60% | 13,924 psi | 71% | 1043 fps | 96.9% |
| Alliant BE-86² | <<locked>> | 60% | 13,996 psi | 71% | 1050 fps | 98.8% |
| Alliant Herco*² | <<locked>> | 64% | 10,588 psi | 54% | 955 fps | 85.8% |
| Alliant UNIQUE*² | <<locked>> | 60% | 13,169 psi | 67% | 1050 fps | 89.8% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,108 psi | 47% | 889 fps | 97.4% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 15,098 psi | 77% | 1083 fps | 97.4% |
| Hodgdon TrailBoss*² | 2.6 gr | 60% | 4,395 psi | 22% | 633 fps | 89.6% |
| Maxam CSB 1² | <<locked>> | 60% | 12,792 psi | 65% | 1004 fps | 96% |
| Maxam CSB 2² | <<locked>> | 60% | 12,792 psi | 65% | 1047 fps | 99.5% |
| Maxam CSB 3² | <<locked>> | 60% | 15,302 psi | 78% | 1063 fps | 99.8% |
| ReloadSwiss RS 14*² | <<locked>> | 68% | 4,714 psi | 24% | 666 fps | 85.4% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 11,734 psi | 60% | 1017 fps | 90.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 13,285 psi | 68% | 1010 fps | 89.8% |
| Somchem MS200*² | <<locked>> | 60% | 14,721 psi | 75% | 1070 fps | 93.1% |
| Vihtavuori N32C Tin Star² | 3.5 gr | 60% | 7,600 psi | 39% | 807 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 15,476 psi | 79% | 1122 fps | 99.1% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,924 psi | 71% | 1056 fps | 91.4% |
| Winchester AutoComp ² | <<locked>> | 60% | 13,198 psi | 67% | 1030 fps | 95.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
* 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 3 powders for 9 mm Steyr loaded with the .358 | 105gr | LEE Mold 358-105-SWC. Vihtavuori N32C Tin Star delivers the highest muzzle velocity at 1,066 fps; across all powders the maximum-charge window runs from 886 fps to 1,066 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 3 of the 3 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (135 MPa), the top charges use 47–88 %, leaving at least 12 % 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. Vihtavuori N32C Tin Star, Hodgdon TrailBoss rank at the top here: for 9 mm Steyr with the .358 | 105gr | LEE Mold 358-105-SWC they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.