Load Specifications
Load data in caliber 9 mm Steyr with .355 | 90gr | Sierra Sports Master bullet and 24 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 No. 2*² | <<locked>> | 64% | 17,303 psi | 88% | 1201 fps | 88.5% |
| Accurate Solo 1250² | <<locked>> | 68% | 17,027 psi | 87% | 1211 fps | 97.3% |
| Alliant BE-86² | <<locked>> | 68% | 17,361 psi | 89% | 1224 fps | 99.2% |
| Alliant Herco* | <<locked>> | 80% | 16,259 psi | 83% | 1217 fps | 90.9% |
| Alliant UNIQUE*² | <<locked>> | 68% | 16,708 psi | 85% | 1237 fps | 91.3% |
| Baschieri & Pellagri 100² | <<locked>> | 64% | 17,550 psi | 90% | 1188 fps | 99.8% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 17,666 psi | 90% | 1224 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 16,955 psi | 87% | 1214 fps | 96.9% |
| Hodgdon Clays² | <<locked>> | 64% | 17,303 psi | 88% | 1099 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,805 psi | 55% | 981 fps | 99.5% |
| Lovex S020*² | <<locked>> | 64% | 17,289 psi | 88% | 1237 fps | 94.4% |
| Maxam CSB 1² | <<locked>> | 68% | 16,302 psi | 83% | 1184 fps | 97% |
| Maxam CSB 2² | <<locked>> | 68% | 15,954 psi | 81% | 1220 fps | 99.8% |
| Maxam CSB 3² | <<locked>> | 64% | 16,679 psi | 85% | 1188 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,747 psi | 50% | 961 fps | 95.7% |
| ReloadSwiss RS 20*² | <<locked>> | 72% | 16,752 psi | 86% | 1260 fps | 93.8% |
| SNPE Vectan A0*² | <<locked>> | 68% | 16,476 psi | 84% | 1181 fps | 90.7% |
| SNPE Vectan BA9 1/2² | <<locked>> | 64% | 17,274 psi | 88% | 1214 fps | 97.2% |
| Somchem MP200*² | <<locked>> | 64% | 17,448 psi | 89% | 1240 fps | 90.4% |
| Somchem MS200*² | <<locked>> | 64% | 16,592 psi | 85% | 1201 fps | 92.3% |
| Vihtavuori N32C Tin Star | <<locked>> | 92% | 17,347 psi | 89% | 1155 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 16,549 psi | 85% | 1237 fps | 98.3% |
| Vihtavuori N340*² | <<locked>> | 68% | 17,361 psi | 89% | 1234 fps | 92.3% |
| Winchester AutoComp ² | <<locked>> | 68% | 16,375 psi | 84% | 1201 fps | 95.9% |
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 No. 2*² | <<locked>> | 60% | 15,432 psi | 79% | 1148 fps | 86.4% |
| Accurate Solo 1250*² | <<locked>> | 60% | 13,532 psi | 69% | 1106 fps | 94.4% |
| Alliant BE-86² | <<locked>> | 60% | 13,706 psi | 70% | 1115 fps | 97.1% |
| Alliant Herco*² | <<locked>> | 68% | 12,357 psi | 63% | 1083 fps | 85.7% |
| Alliant UNIQUE*² | <<locked>> | 60% | 13,605 psi | 69% | 1132 fps | 87.4% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 15,635 psi | 80% | 1135 fps | 99.2% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 9,268 psi | 47% | 958 fps | 95.7% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 14,852 psi | 76% | 1152 fps | 95.2% |
| Hodgdon Clays² | <<locked>> | 60% | 15,896 psi | 81% | 1066 fps | 100% |
| Hodgdon TrailBoss*² | 2.6 gr | 60% | 5,250 psi | 27% | 709 fps | 90.4% |
| Lovex S020*² | <<locked>> | 60% | 15,519 psi | 79% | 1184 fps | 92.7% |
| Maxam CSB 1*² | <<locked>> | 60% | 13,082 psi | 67% | 1083 fps | 94% |
| Maxam CSB 2² | <<locked>> | 60% | 12,618 psi | 64% | 1119 fps | 98.1% |
| Maxam CSB 3² | <<locked>> | 60% | 14,866 psi | 76% | 1135 fps | 98.8% |
| ReloadSwiss RS 14*² | <<locked>> | 68% | 5,700 psi | 29% | 745 fps | 86.4% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 11,922 psi | 61% | 1089 fps | 87.1% |
| SNPE Vectan A0*² | <<locked>> | 60% | 12,981 psi | 66% | 1070 fps | 86.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 15,505 psi | 79% | 1165 fps | 96% |
| Somchem MP200*² | <<locked>> | 60% | 15,853 psi | 81% | 1191 fps | 88.6% |
| Somchem MS200*² | <<locked>> | 60% | 14,489 psi | 74% | 1135 fps | 90% |
| Vihtavuori N32C Tin Star² | 3.5 gr | 60% | 8,122 psi | 41% | 879 fps | 99.7% |
| Vihtavuori N330² | <<locked>> | 60% | 14,765 psi | 75% | 1184 fps | 97.2% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,590 psi | 69% | 1115 fps | 87.9% |
| Winchester AutoComp *² | <<locked>> | 60% | 13,097 psi | 67% | 1096 fps | 92.6% |
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 4 powders for 9 mm Steyr loaded with the .355 | 90gr | Sierra Sports Master. Baschieri & Pellagri 102 Pistol delivers the highest muzzle velocity at 1,224 fps; across all powders the maximum-charge window runs from 961 fps to 1,224 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 4 of the 4 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (135 MPa), the top charges use 50–90 %, leaving at least 10 % 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 .355 | 90gr | Sierra Sports Master 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.