Load Specifications
Load data in caliber 9 mm Para with .355 | 121gr | Frontier Bullets CMJ FP atch bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 20, Alliant UNIQUE 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>> | 80% | 29,704 psi | 87% | 1115 fps | 96.6% |
| Accurate No. 5*² | <<locked>> | 68% | 30,792 psi | 90% | 1188 fps | 88.9% |
| Accurate Solo 1000 | <<locked>> | 80% | 30,226 psi | 89% | 1073 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 88% | 30,690 psi | 90% | 1129 fps | 100% |
| ADI AP 70N² | <<locked>> | 72% | 29,327 psi | 86% | 1122 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 30,530 psi | 90% | 974 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 28,790 psi | 84% | 988 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 30,037 psi | 88% | 1043 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 29,414 psi | 86% | 1076 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 29,037 psi | 85% | 1106 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 76% | 29,863 psi | 88% | 1161 fps | 99.2% |
| Alliant Green Dot | <<locked>> | 80% | 29,080 psi | 85% | 1073 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 27,470 psi | 81% | 1129 fps | 98.2% |
| Alliant RED DOT | <<locked>> | 84% | 30,226 psi | 89% | 1066 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 29,834 psi | 88% | 1161 fps | 98.8% |
| Alliant UNIQUE | <<locked>> | 88% | 29,254 psi | 86% | 1161 fps | 98.7% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 30,835 psi | 90% | 1086 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 27,166 psi | 80% | 1063 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 27,731 psi | 81% | 1076 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 84% | 30,763 psi | 90% | 1138 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 28,718 psi | 84% | 984 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 28,979 psi | 85% | 1152 fps | 90.4% |
| Hodgdon Longshot*² | <<locked>> | 68% | 27,978 psi | 82% | 1138 fps | 92% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,937 psi | 38% | 774 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 29,327 psi | 86% | 1122 fps | 100% |
| Lovex D036*² | <<locked>> | 68% | 30,734 psi | 90% | 1188 fps | 88.9% |
| Lovex S011² | <<locked>> | 68% | 27,615 psi | 81% | 1060 fps | 100% |
| Lovex S020 | <<locked>> | 80% | 29,138 psi | 85% | 1132 fps | 99.6% |
| Maxam CSB 1 | <<locked>> | 92% | 30,095 psi | 88% | 1119 fps | 100% |
| Maxam CSB 2 | <<locked>> | 88% | 29,979 psi | 88% | 1138 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 29,863 psi | 88% | 1099 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 29,631 psi | 87% | 1079 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 30,182 psi | 89% | 1043 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 72% | 28,979 psi | 85% | 1148 fps | 97% |
| Ramshot True Blue*² | <<locked>> | 68% | 29,472 psi | 86% | 1158 fps | 92.9% |
| ReloadSwiss RS 12² | <<locked>> | 76% | 29,820 psi | 87% | 1119 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,690 psi | 34% | 758 fps | 98.2% |
| ReloadSwiss RS 20 | <<locked>> | 92% | 29,530 psi | 87% | 1181 fps | 99.8% |
| Rottweil P 801² | <<locked>> | 68% | 28,384 psi | 83% | 1070 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 27,485 psi | 81% | 1230 fps | 90.3% |
| Shooters World Auto Pistol*² | <<locked>> | 68% | 30,734 psi | 90% | 1188 fps | 88.9% |
| SNPE Vectan A0 | <<locked>> | 88% | 28,065 psi | 82% | 1102 fps | 98.1% |
| SNPE Vectan A1 | <<locked>> | 80% | 29,689 psi | 87% | 1099 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 28,558 psi | 84% | 1096 fps | 99.9% |
| SNPE Vectan BA10² | <<locked>> | 72% | 30,124 psi | 88% | 1004 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 96% | 28,892 psi | 85% | 1138 fps | 91.7% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 30,487 psi | 89% | 1132 fps | 100% |
| Somchem MP200 | <<locked>> | 80% | 29,704 psi | 87% | 1152 fps | 97.9% |
| Somchem MS200 | <<locked>> | 84% | 29,341 psi | 86% | 1132 fps | 99.2% |
| Vihtavuori 3N37* | <<locked>> | 88% | 28,123 psi | 83% | 1155 fps | 92.6% |
| Vihtavuori N320 | <<locked>> | 80% | 30,632 psi | 90% | 1099 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,234 psi | 65% | 938 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 28,950 psi | 85% | 1132 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 27,934 psi | 82% | 1115 fps | 98.4% |
| Vihtavuori N350* | <<locked>> | 96% | 29,457 psi | 86% | 1168 fps | 93.6% |
| Winchester 231² | <<locked>> | 68% | 29,820 psi | 87% | 1109 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 29,066 psi | 85% | 1122 fps | 100% |
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% | 17,114 psi | 50% | 899 fps | 88.8% |
| Accurate No. 5*² | <<locked>> | 64% | 26,890 psi | 79% | 1125 fps | 86.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 18,231 psi | 53% | 892 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,185 psi | 45% | 863 fps | 96.3% |
| ADI AP 70N² | <<locked>> | 60% | 21,277 psi | 62% | 997 fps | 99.6% |
| ADI APS 350² | <<locked>> | 60% | 21,437 psi | 63% | 860 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,653 psi | 61% | 876 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,768 psi | 55% | 879 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,812 psi | 58% | 928 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,374 psi | 45% | 873 fps | 98.5% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 19,667 psi | 58% | 984 fps | 94.9% |
| Alliant Green Dot² | <<locked>> | 60% | 18,681 psi | 55% | 912 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 12,952 psi | 38% | 820 fps | 87.2% |
| Alliant RED DOT² | <<locked>> | 60% | 17,898 psi | 53% | 879 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 21,727 psi | 64% | 1024 fps | 95.5% |
| Alliant UNIQUE*² | 3.6 gr | 60% | 14,939 psi | 44% | 879 fps | 89.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,376 psi | 51% | 883 fps | 99.8% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,936 psi | 32% | 755 fps | 98% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 17,651 psi | 52% | 919 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 16,607 psi | 49% | 899 fps | 96.9% |
| Hodgdon Clays² | <<locked>> | 60% | 16,839 psi | 49% | 810 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 22,916 psi | 67% | 1050 fps | 86.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,002 psi | 65% | 1037 fps | 88% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,976 psi | 20% | 571 fps | 96% |
| Hodgdon Universal² | <<locked>> | 60% | 18,014 psi | 53% | 932 fps | 98.6% |
| Lovex D036*² | <<locked>> | 64% | 26,832 psi | 79% | 1129 fps | 86.5% |
| Lovex S011² | <<locked>> | 60% | 22,089 psi | 65% | 978 fps | 99.9% |
| Lovex S020*² | <<locked>> | 60% | 16,737 psi | 49% | 915 fps | 94.2% |
| Maxam CSB 1² | <<locked>> | 60% | 14,736 psi | 43% | 846 fps | 96% |
| Maxam CSB 2² | <<locked>> | 60% | 14,359 psi | 42% | 873 fps | 99.4% |
| Maxam CSB 3² | <<locked>> | 60% | 16,868 psi | 49% | 889 fps | 99.7% |
| Maxam CSB 4² | <<locked>> | 60% | 17,985 psi | 53% | 899 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,624 psi | 61% | 912 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 20,189 psi | 59% | 994 fps | 92.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,250 psi | 68% | 1053 fps | 89% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,537 psi | 57% | 968 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 6,686 psi | 20% | 561 fps | 90.9% |
| ReloadSwiss RS 20*² | 3.8 gr | 60% | 13,285 psi | 39% | 856 fps | 90% |
| Rottweil P 801² | <<locked>> | 60% | 23,105 psi | 68% | 997 fps | 100% |
| Rottweil P 806* | <<locked>> | 92% | 21,901 psi | 64% | 1135 fps | 86.2% |
| Shooters World Auto Pistol*² | <<locked>> | 64% | 26,832 psi | 79% | 1129 fps | 86.5% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,272 psi | 42% | 833 fps | 88.6% |
| SNPE Vectan A1² | <<locked>> | 60% | 17,854 psi | 52% | 909 fps | 99% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,071 psi | 50% | 896 fps | 95.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,800 psi | 67% | 909 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 19,957 psi | 59% | 981 fps | 85.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,274 psi | 51% | 909 fps | 97.5% |
| Somchem MP200*² | <<locked>> | 60% | 17,506 psi | 51% | 932 fps | 90.8% |
| Somchem MS200*² | <<locked>> | 60% | 16,201 psi | 48% | 889 fps | 92.3% |
| Vihtavuori 3N37*² | <<locked>> | 76% | 20,363 psi | 60% | 1017 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 18,347 psi | 54% | 922 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,240 psi | 30% | 699 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 16,273 psi | 48% | 922 fps | 98.4% |
| Vihtavuori N340*² | 3.8 gr | 60% | 15,055 psi | 44% | 869 fps | 90.3% |
| Vihtavuori N350* | <<locked>> | 80% | 19,493 psi | 57% | 997 fps | 86.7% |
| Winchester 231² | <<locked>> | 60% | 23,482 psi | 69% | 1017 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,026 psi | 44% | 866 fps | 95% |
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 24 powders for 9 mm Para loaded with the .355 | 121gr | Frontier Bullets CMJ FP atch. ReloadSwiss RS 20 delivers the highest muzzle velocity at 1,181 fps; across all powders the maximum-charge window runs from 758 fps to 1,181 fps. Alliant Herco gives the best case fill at 100 %, and 24 of the 24 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 34–90 %, 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. ReloadSwiss RS 20, Alliant UNIQUE, Vihtavuori N340 rank at the top here: for 9 mm Para with the .355 | 121gr | Frontier Bullets CMJ FP atch they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, SNPE Vectan BA7 1/2, Vihtavuori 3N37, Vihtavuori N350 burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1250, Alliant BE-86, Alliant Herco 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.