Load Specifications
Load data in caliber 9 mm Para with .355 | 124gr | Speer HPSB GD bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, ReloadSwiss RS 20 and Vihtavuori N340.
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% | 29,240 psi | 86% | 1079 fps | 96% |
| Accurate Solo 1000 | <<locked>> | 84% | 30,313 psi | 89% | 1047 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 29,704 psi | 87% | 1093 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 28,558 psi | 84% | 1096 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 28,819 psi | 85% | 932 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 30,240 psi | 89% | 978 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 29,182 psi | 86% | 1014 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 28,689 psi | 84% | 1047 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 30,560 psi | 90% | 1099 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 28,892 psi | 85% | 1122 fps | 98.8% |
| Alliant Green Dot | <<locked>> | 84% | 28,239 psi | 83% | 1043 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 23,308 psi | 68% | 1043 fps | 96.2% |
| Alliant RED DOT | <<locked>> | 88% | 29,341 psi | 86% | 1037 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 30,342 psi | 89% | 1142 fps | 98.7% |
| Alliant UNIQUE | <<locked>> | 92% | 27,702 psi | 81% | 1115 fps | 98% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 28,297 psi | 83% | 1033 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 23,859 psi | 70% | 1001 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 30,501 psi | 89% | 1086 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 29,776 psi | 87% | 1109 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 30,023 psi | 88% | 978 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 29,907 psi | 88% | 1079 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 29,022 psi | 85% | 1125 fps | 89.8% |
| Hodgdon Longshot*² | <<locked>> | 72% | 28,747 psi | 84% | 1125 fps | 91.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,312 psi | 30% | 712 fps | 99.3% |
| Hodgdon Universal | <<locked>> | 84% | 28,558 psi | 84% | 1096 fps | 100% |
| Lovex S011² | <<locked>> | 72% | 29,051 psi | 85% | 1053 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 29,269 psi | 86% | 1109 fps | 99.5% |
| Maxam CSB 1 | <<locked>> | 96% | 29,051 psi | 85% | 1079 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 30,676 psi | 90% | 1129 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 28,514 psi | 84% | 1060 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 30,835 psi | 90% | 1070 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 29,805 psi | 87% | 1017 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 28,500 psi | 84% | 1115 fps | 96.4% |
| Ramshot True Blue*² | <<locked>> | 72% | 29,515 psi | 87% | 1129 fps | 92.3% |
| Ramshot Zip² | <<locked>> | 64% | 28,703 psi | 84% | 1070 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 28,514 psi | 84% | 1089 fps | 100% |
| ReloadSwiss RS 14*ᴾ | <<locked>> | 100% | 8,920 psi | 26% | 686 fps | 94.6% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 28,935 psi | 85% | 1148 fps | 99.6% |
| Rottweil P 801² | <<locked>> | 76% | 29,689 psi | 87% | 1066 fps | 100% |
| SNPE Vectan A0 | <<locked>> | 96% | 29,776 psi | 87% | 1099 fps | 98.3% |
| SNPE Vectan A1 | <<locked>> | 84% | 30,269 psi | 89% | 1079 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 29,211 psi | 86% | 1076 fps | 99.9% |
| SNPE Vectan BA10² | <<locked>> | 76% | 30,226 psi | 89% | 978 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 27,847 psi | 82% | 1093 fps | 90.5% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 29,385 psi | 86% | 1093 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 28,848 psi | 85% | 1115 fps | 97.3% |
| Somchem MS200 | <<locked>> | 92% | 30,748 psi | 90% | 1125 fps | 99.3% |
| Vihtavuori 3N37* | <<locked>> | 96% | 30,197 psi | 89% | 1155 fps | 93.1% |
| Vihtavuori N310² | <<locked>> | 64% | 27,630 psi | 81% | 965 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 30,240 psi | 89% | 1073 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 18,826 psi | 55% | 879 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 30,327 psi | 89% | 1129 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 30,835 psi | 90% | 1129 fps | 98.9% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 28,239 psi | 83% | 1125 fps | 92.5% |
| Winchester 231² | <<locked>> | 72% | 28,703 psi | 84% | 1070 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 27,833 psi | 82% | 1115 fps | 90.6% |
| Winchester AutoComp | <<locked>> | 92% | 28,195 psi | 83% | 1089 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>> | 60% | 14,547 psi | 43% | 823 fps | 85.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 16,114 psi | 47% | 837 fps | 100% |
| Accurate Solo 1250*² | <<locked>> | 60% | 12,937 psi | 38% | 801 fps | 93.8% |
| ADI AP 70N² | <<locked>> | 60% | 17,796 psi | 52% | 922 fps | 98.3% |
| ADI APS 350² | <<locked>> | 60% | 18,985 psi | 56% | 807 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 18,594 psi | 55% | 827 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 15,940 psi | 47% | 820 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,143 psi | 50% | 869 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 12,531 psi | 37% | 797 fps | 96% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 16,940 psi | 50% | 909 fps | 92.3% |
| Alliant Green Dot² | <<locked>> | 60% | 15,142 psi | 44% | 830 fps | 99.6% |
| Alliant Herco*² | <<locked>> | 72% | 12,285 psi | 36% | 801 fps | 85.6% |
| Alliant RED DOT² | <<locked>> | 60% | 14,910 psi | 44% | 814 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 19,203 psi | 56% | 955 fps | 93.3% |
| Alliant UNIQUE*² | 3.3 gr | 60% | 12,488 psi | 37% | 810 fps | 85.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 15,026 psi | 44% | 823 fps | 98.9% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 8,615 psi | 25% | 689 fps | 94.8% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 14,562 psi | 43% | 846 fps | 99.3% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 23,018 psi | 68% | 1014 fps | 99.1% |
| Hodgdon Clays² | <<locked>> | 60% | 14,576 psi | 43% | 758 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 26,121 psi | 77% | 1033 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 68% | 22,133 psi | 65% | 1014 fps | 85.1% |
| Hodgdon Longshot*² | <<locked>> | 64% | 21,843 psi | 64% | 1010 fps | 87.3% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,859 psi | 14% | 502 fps | 89.2% |
| Hodgdon Universal² | <<locked>> | 60% | 15,229 psi | 45% | 866 fps | 96.7% |
| Lovex S011² | <<locked>> | 60% | 20,378 psi | 60% | 928 fps | 99.6% |
| Lovex S020*² | <<locked>> | 60% | 14,402 psi | 42% | 853 fps | 91.5% |
| Maxam CSB 1*² | <<locked>> | 60% | 11,821 psi | 35% | 768 fps | 92.4% |
| Maxam CSB 2² | <<locked>> | 60% | 11,356 psi | 33% | 797 fps | 97.2% |
| Maxam CSB 3² | <<locked>> | 60% | 13,721 psi | 40% | 810 fps | 98.1% |
| Maxam CSB 4² | <<locked>> | 60% | 15,563 psi | 46% | 843 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 17,956 psi | 53% | 860 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 17,143 psi | 50% | 915 fps | 88.8% |
| Ramshot True Blue*² | <<locked>> | 60% | 19,841 psi | 58% | 968 fps | 85.6% |
| Ramshot Zip² | <<locked>> | 60% | 25,034 psi | 73% | 1020 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 15,374 psi | 45% | 889 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 68% | 5,366 psi | 16% | 535 fps | 85.4% |
| ReloadSwiss RS 20*² | 3.7 gr | 64% | 12,531 psi | 37% | 827 fps | 88.2% |
| Rottweil P 801² | <<locked>> | 60% | 19,102 psi | 56% | 925 fps | 100% |
| SNPE Vectan A0*² | <<locked>> | 60% | 12,459 psi | 37% | 774 fps | 85.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 15,331 psi | 45% | 840 fps | 97.4% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 14,678 psi | 43% | 827 fps | 93.4% |
| SNPE Vectan BA10² | <<locked>> | 60% | 20,900 psi | 61% | 863 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 88% | 21,234 psi | 62% | 984 fps | 85.8% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 14,301 psi | 42% | 833 fps | 94.8% |
| Somchem MP200*² | <<locked>> | 60% | 14,866 psi | 44% | 860 fps | 87.4% |
| Somchem MS200*² | <<locked>> | 60% | 13,402 psi | 39% | 810 fps | 88.5% |
| Vihtavuori 3N37* | <<locked>> | 80% | 19,058 psi | 56% | 974 fps | 85.4% |
| Vihtavuori N310² | <<locked>> | 60% | 24,613 psi | 72% | 928 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 15,650 psi | 46% | 863 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,368 psi | 22% | 627 fps | 99.3% |
| Vihtavuori N330² | <<locked>> | 60% | 13,140 psi | 39% | 840 fps | 95.8% |
| Vihtavuori N340*² | 3.4 gr | 60% | 12,256 psi | 36% | 791 fps | 86% |
| Vihtavuori N350* | <<locked>> | 88% | 20,929 psi | 61% | 1007 fps | 87.5% |
| Winchester 231² | <<locked>> | 60% | 20,726 psi | 61% | 955 fps | 99.6% |
| Winchester 572*² | <<locked>> | 60% | 24,598 psi | 72% | 1066 fps | 88.5% |
| Winchester AutoComp *² | <<locked>> | 60% | 12,212 psi | 36% | 787 fps | 91.4% |
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 57 powders for 9 mm Para loaded with the .355 | 124gr | Speer HPSB GD. Vihtavuori 3N37 delivers the highest muzzle velocity at 1,155 fps; across all powders the maximum-charge window runs from 686 fps to 1,155 fps. Alliant Herco gives the best case fill at 100 %, and 41 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 26–90 %, 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, ReloadSwiss RS 20, Vihtavuori N340 rank at the top here: for 9 mm Para with the .355 | 124gr | Speer HPSB GD they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon HS-6, Hodgdon Longshot, Ramshot True Blue 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.