Load Specifications
Load data in caliber 9 mm Para with .355 | 125gr | Sierra Sports Master bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, Somchem MS200 and ReloadSwiss RS 20.
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: 4"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2* | <<locked>> | 84% | 28,108 psi | 82% | 1033 fps | 94.8% |
| Accurate Solo 1000 | <<locked>> | 84% | 28,442 psi | 83% | 1001 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 29,863 psi | 88% | 1066 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 29,805 psi | 87% | 1086 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 29,153 psi | 86% | 912 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 28,007 psi | 82% | 932 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 29,965 psi | 88% | 997 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 29,588 psi | 87% | 1033 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 28,572 psi | 84% | 1050 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 30,284 psi | 89% | 1112 fps | 98.7% |
| Alliant Green Dot | <<locked>> | 92% | 30,603 psi | 90% | 1047 fps | 100% |
| Alliant Herco*ᴾ | <<locked>> | 100% | 21,727 psi | 64% | 991 fps | 94.6% |
| Alliant RED DOT | <<locked>> | 92% | 29,950 psi | 88% | 1020 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 30,661 psi | 90% | 1119 fps | 98.3% |
| Alliant UNIQUE | <<locked>> | 96% | 29,254 psi | 86% | 1112 fps | 98% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 28,036 psi | 82% | 1004 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 21,785 psi | 64% | 951 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 28,137 psi | 83% | 1037 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 27,659 psi | 81% | 1056 fps | 99.7% |
| Hodgdon Clays | <<locked>> | 92% | 29,515 psi | 87% | 948 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 27,224 psi | 80% | 1020 fps | 100% |
| Hodgdon HS-6* | <<locked>> | 80% | 30,647 psi | 90% | 1115 fps | 89.7% |
| Hodgdon Longshot*² | <<locked>> | 76% | 30,139 psi | 88% | 1112 fps | 91.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 9,413 psi | 28% | 673 fps | 98.3% |
| Hodgdon Universal | <<locked>> | 88% | 28,384 psi | 83% | 1070 fps | 100% |
| Lovex S011² | <<locked>> | 76% | 30,414 psi | 89% | 1043 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 29,733 psi | 87% | 1086 fps | 99.2% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 30,632 psi | 90% | 1073 fps | 100% |
| Maxam CSB 2ᴾ | <<locked>> | 100% | 30,705 psi | 90% | 1106 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 29,646 psi | 87% | 1047 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 28,964 psi | 85% | 1024 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 30,501 psi | 89% | 1001 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 30,632 psi | 90% | 1115 fps | 96.6% |
| Ramshot True Blue*² | <<locked>> | 72% | 27,253 psi | 80% | 1066 fps | 90.1% |
| Ramshot Zip² | <<locked>> | 68% | 30,211 psi | 89% | 1063 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 28,094 psi | 82% | 1063 fps | 100% |
| ReloadSwiss RS 14*ᴾ | <<locked>> | 100% | 8,151 psi | 24% | 646 fps | 92.6% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 29,689 psi | 87% | 1129 fps | 99.5% |
| Rottweil P 801 | <<locked>> | 80% | 30,792 psi | 90% | 1060 fps | 100% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 30,443 psi | 89% | 1076 fps | 98% |
| SNPE Vectan A1 | <<locked>> | 84% | 28,224 psi | 83% | 1030 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 29,704 psi | 87% | 1053 fps | 99.7% |
| SNPE Vectan BA10² | <<locked>> | 76% | 29,559 psi | 87% | 948 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 25,817 psi | 76% | 1033 fps | 88.2% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 28,195 psi | 83% | 1053 fps | 100% |
| Somchem MP200 | <<locked>> | 88% | 29,472 psi | 86% | 1096 fps | 97% |
| Somchem MS200 | <<locked>> | 92% | 28,558 psi | 84% | 1070 fps | 98.4% |
| Vihtavuori 3N37*ᴾ | <<locked>> | 100% | 30,458 psi | 89% | 1129 fps | 92.4% |
| Vihtavuori N310² | <<locked>> | 68% | 29,675 psi | 87% | 965 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 29,907 psi | 88% | 1047 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 17,114 psi | 50% | 837 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 28,979 psi | 85% | 1086 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 28,616 psi | 84% | 1073 fps | 97.8% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 25,759 psi | 76% | 1060 fps | 90.1% |
| Winchester 231² | <<locked>> | 76% | 30,211 psi | 89% | 1063 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 30,342 psi | 89% | 1056 fps | 100% |
| Winchester 572*² | <<locked>> | 68% | 29,878 psi | 88% | 1115 fps | 90.8% |
| Winchester AutoComp | <<locked>> | 96% | 28,979 psi | 85% | 1070 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 64% | 15,679 psi | 46% | 827 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 15,882 psi | 47% | 810 fps | 99.8% |
| Accurate Solo 1250*² | <<locked>> | 60% | 12,053 psi | 35% | 758 fps | 91.9% |
| ADI AP 70N² | <<locked>> | 60% | 16,984 psi | 50% | 883 fps | 97.5% |
| ADI APS 350² | <<locked>> | 60% | 18,507 psi | 54% | 781 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 17,231 psi | 51% | 787 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 15,534 psi | 46% | 794 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 16,027 psi | 47% | 827 fps | 99.6% |
| Alliant BE-86*² | <<locked>> | 60% | 11,879 psi | 35% | 764 fps | 94.7% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 16,099 psi | 47% | 866 fps | 90.6% |
| Alliant Green Dot² | <<locked>> | 60% | 14,866 psi | 44% | 804 fps | 99.3% |
| Alliant Herco*² | <<locked>> | 76% | 13,053 psi | 38% | 804 fps | 86% |
| Alliant RED DOT² | <<locked>> | 60% | 14,431 psi | 42% | 787 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 17,637 psi | 52% | 899 fps | 91.1% |
| Alliant UNIQUE*² | 3.2 gr | 64% | 13,126 psi | 39% | 807 fps | 86% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 14,025 psi | 41% | 784 fps | 98% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 7,948 psi | 23% | 653 fps | 92.8% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 13,634 psi | 40% | 810 fps | 98.5% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 21,901 psi | 64% | 971 fps | 98.4% |
| Hodgdon Clays² | <<locked>> | 60% | 14,170 psi | 42% | 735 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 24,627 psi | 72% | 988 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 23,772 psi | 70% | 1017 fps | 85.3% |
| Hodgdon Longshot*² | <<locked>> | 64% | 20,450 psi | 60% | 961 fps | 85.1% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,786 psi | 14% | 489 fps | 88.1% |
| Hodgdon Universal² | <<locked>> | 60% | 14,286 psi | 42% | 823 fps | 95.4% |
| Lovex S011² | <<locked>> | 60% | 18,420 psi | 54% | 873 fps | 98.6% |
| Lovex S020*² | <<locked>> | 60% | 12,879 psi | 38% | 794 fps | 88.7% |
| Maxam CSB 1*² | <<locked>> | 60% | 10,936 psi | 32% | 725 fps | 90.4% |
| Maxam CSB 2² | <<locked>> | 60% | 10,298 psi | 30% | 755 fps | 95.6% |
| Maxam CSB 3² | <<locked>> | 60% | 13,503 psi | 40% | 787 fps | 97.6% |
| Maxam CSB 4² | <<locked>> | 60% | 14,359 psi | 42% | 797 fps | 99.6% |
| Maxam CSB 5² | <<locked>> | 60% | 16,491 psi | 48% | 817 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 16,114 psi | 47% | 869 fps | 86.7% |
| Ramshot True Blue*² | <<locked>> | 64% | 21,031 psi | 62% | 965 fps | 85.6% |
| Ramshot Zip² | <<locked>> | 60% | 23,583 psi | 69% | 978 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 14,272 psi | 42% | 850 fps | 99.9% |
| ReloadSwiss RS 14*² | <<locked>> | 76% | 5,656 psi | 17% | 541 fps | 85.6% |
| ReloadSwiss RS 20*² | 3.3 gr | 64% | 11,414 psi | 33% | 771 fps | 85.1% |
| Rottweil P 801² | <<locked>> | 60% | 17,056 psi | 50% | 876 fps | 100% |
| SNPE Vectan A0*² | <<locked>> | 64% | 13,184 psi | 39% | 774 fps | 85.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 14,692 psi | 43% | 807 fps | 96.4% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 14,083 psi | 41% | 791 fps | 92% |
| SNPE Vectan BA10² | <<locked>> | 60% | 19,595 psi | 57% | 823 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 92% | 21,799 psi | 64% | 968 fps | 85.2% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 13,503 psi | 40% | 794 fps | 93.4% |
| Somchem MP200*² | <<locked>> | 64% | 15,084 psi | 44% | 843 fps | 86.8% |
| Somchem MS200*² | 3 gr | 60% | 12,647 psi | 37% | 771 fps | 86.6% |
| Vihtavuori 3N37* | <<locked>> | 84% | 20,247 psi | 59% | 971 fps | 85.5% |
| Vihtavuori N310² | <<locked>> | 60% | 22,989 psi | 67% | 889 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 14,417 psi | 42% | 820 fps | 99.7% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 6,889 psi | 20% | 600 fps | 98.6% |
| Vihtavuori N330*² | <<locked>> | 60% | 12,314 psi | 36% | 801 fps | 94.2% |
| Vihtavuori N340*² | <<locked>> | 64% | 12,995 psi | 38% | 791 fps | 86.2% |
| Vihtavuori N350* | <<locked>> | 92% | 21,408 psi | 63% | 988 fps | 86.8% |
| Winchester 231² | <<locked>> | 60% | 19,102 psi | 56% | 902 fps | 98.8% |
| Winchester 244² | <<locked>> | 60% | 26,136 psi | 77% | 1007 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 22,829 psi | 67% | 1007 fps | 86.2% |
| Winchester AutoComp *² | <<locked>> | 60% | 11,661 psi | 34% | 755 fps | 89.8% |
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 58 powders for 9 mm Para loaded with the .355 | 125gr | Sierra Sports Master. ReloadSwiss RS 20 delivers the highest muzzle velocity at 1,129 fps; across all powders the maximum-charge window runs from 646 fps to 1,129 fps. Alliant Herco gives the best case fill at 100 %, and 47 of the 58 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 24–90 %, leaving at least 10 % headroom. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss 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. Alliant UNIQUE, Somchem MS200, ReloadSwiss RS 20 rank at the top here: for 9 mm Para with the .355 | 125gr | Sierra Sports Master they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 2, Alliant Herco, Hodgdon HS-6 burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 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.