Load Specifications
Load data in caliber 9 mm Para with .355 | 124gr | X-TREME RP HP 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 Winchester AutoComp .
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. 2² | <<locked>> | 76% | 27,238 psi | 80% | 1070 fps | 96.1% |
| Accurate No. 5*² | <<locked>> | 64% | 27,934 psi | 82% | 1132 fps | 87.9% |
| Accurate Solo 1000 | <<locked>> | 80% | 30,298 psi | 89% | 1060 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 88% | 30,792 psi | 90% | 1119 fps | 100% |
| ADI AP 70N² | <<locked>> | 72% | 30,647 psi | 90% | 1129 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 29,124 psi | 85% | 945 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 30,066 psi | 88% | 988 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 30,110 psi | 88% | 1030 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 29,472 psi | 86% | 1063 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 29,182 psi | 86% | 1093 fps | 100% |
| Alliant BULLSEYE² | <<locked>> | 76% | 29,936 psi | 88% | 1148 fps | 99.4% |
| Alliant Green Dot | <<locked>> | 80% | 29,138 psi | 85% | 1063 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 28,471 psi | 84% | 1132 fps | 98.7% |
| Alliant RED DOT | <<locked>> | 80% | 29,037 psi | 85% | 1037 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 27,746 psi | 81% | 1119 fps | 98.5% |
| Alliant UNIQUE | <<locked>> | 88% | 30,458 psi | 89% | 1165 fps | 99.2% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 29,704 psi | 87% | 1060 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 28,282 psi | 83% | 1063 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 28,848 psi | 85% | 1076 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 28,645 psi | 84% | 971 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 30,037 psi | 88% | 1158 fps | 91.5% |
| Hodgdon Longshot*² | <<locked>> | 68% | 29,066 psi | 85% | 1145 fps | 93.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,995 psi | 38% | 764 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 30,647 psi | 90% | 1129 fps | 100% |
| Lovex D036*² | <<locked>> | 64% | 27,876 psi | 82% | 1132 fps | 87.8% |
| Lovex S011² | <<locked>> | 68% | 28,877 psi | 85% | 1063 fps | 100% |
| Lovex S020 | <<locked>> | 80% | 30,618 psi | 90% | 1138 fps | 99.9% |
| Maxam CSB 1 | <<locked>> | 88% | 29,037 psi | 85% | 1093 fps | 100% |
| Maxam CSB 2 | <<locked>> | 88% | 30,255 psi | 89% | 1125 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 30,037 psi | 88% | 1086 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 29,733 psi | 87% | 1066 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 30,298 psi | 89% | 1030 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 72% | 30,095 psi | 88% | 1152 fps | 97.7% |
| Ramshot True Blue*² | <<locked>> | 68% | 30,574 psi | 90% | 1161 fps | 93.9% |
| ReloadSwiss RS 12² | <<locked>> | 76% | 30,052 psi | 88% | 1109 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,299 psi | 36% | 764 fps | 98.9% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 27,673 psi | 81% | 1142 fps | 99.7% |
| Rottweil P 801² | <<locked>> | 68% | 28,558 psi | 84% | 1056 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 28,616 psi | 84% | 1234 fps | 91.5% |
| Shooters World Auto Pistol*² | <<locked>> | 64% | 27,876 psi | 82% | 1132 fps | 87.8% |
| SNPE Vectan A0 | <<locked>> | 88% | 29,211 psi | 86% | 1106 fps | 98.7% |
| SNPE Vectan A1² | <<locked>> | 76% | 27,615 psi | 81% | 1060 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 29,704 psi | 87% | 1099 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 30,052 psi | 88% | 991 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 96% | 29,936 psi | 88% | 1142 fps | 92.7% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 28,326 psi | 83% | 1089 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 84% | 28,660 psi | 84% | 1201 fps | 87.6% |
| Somchem MP200 | <<locked>> | 80% | 29,834 psi | 88% | 1142 fps | 98.2% |
| Somchem MS200 | <<locked>> | 84% | 29,457 psi | 86% | 1122 fps | 99.4% |
| Vihtavuori 3N37* | <<locked>> | 88% | 29,283 psi | 86% | 1158 fps | 93.7% |
| Vihtavuori N320² | <<locked>> | 76% | 28,123 psi | 83% | 1056 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,423 psi | 66% | 925 fps | 100% |
| Vihtavuori N330 | <<locked>> | 80% | 29,095 psi | 85% | 1119 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 29,109 psi | 85% | 1119 fps | 99% |
| Vihtavuori N350* | <<locked>> | 96% | 30,530 psi | 90% | 1175 fps | 94.6% |
| Winchester 231² | <<locked>> | 68% | 29,965 psi | 88% | 1096 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 30,284 psi | 89% | 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% | 17,245 psi | 51% | 892 fps | 89.5% |
| Accurate No. 5*² | <<locked>> | 60% | 24,439 psi | 72% | 1073 fps | 85.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,247 psi | 56% | 899 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,316 psi | 45% | 856 fps | 96.8% |
| ADI AP 70N² | <<locked>> | 60% | 22,336 psi | 66% | 1004 fps | 99.9% |
| ADI APS 350² | <<locked>> | 60% | 21,422 psi | 63% | 846 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,639 psi | 61% | 866 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 19,812 psi | 58% | 886 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 19,856 psi | 58% | 919 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 16,186 psi | 47% | 879 fps | 99.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 19,769 psi | 58% | 974 fps | 95.5% |
| Alliant Green Dot² | <<locked>> | 60% | 18,710 psi | 55% | 899 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 12,038 psi | 35% | 784 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 17,985 psi | 53% | 869 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 21,799 psi | 64% | 1014 fps | 95.9% |
| Alliant UNIQUE*² | 3.7 gr | 60% | 15,751 psi | 46% | 889 fps | 91.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,463 psi | 51% | 873 fps | 99.9% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 11,531 psi | 34% | 764 fps | 98.8% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 18,420 psi | 54% | 922 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 16,868 psi | 49% | 801 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 20,784 psi | 61% | 1001 fps | 85.2% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,147 psi | 65% | 1027 fps | 88.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,020 psi | 21% | 568 fps | 96.5% |
| Hodgdon Universal² | <<locked>> | 60% | 18,898 psi | 55% | 938 fps | 99.2% |
| Lovex D036*² | <<locked>> | 60% | 24,395 psi | 72% | 1073 fps | 85.4% |
| Lovex S011² | <<locked>> | 60% | 23,148 psi | 68% | 984 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,622 psi | 52% | 922 fps | 95.4% |
| Maxam CSB 1² | <<locked>> | 60% | 14,808 psi | 43% | 840 fps | 96.5% |
| Maxam CSB 2² | <<locked>> | 60% | 15,258 psi | 45% | 883 fps | 99.8% |
| Maxam CSB 3² | <<locked>> | 60% | 17,027 psi | 50% | 883 fps | 99.8% |
| Maxam CSB 4² | <<locked>> | 60% | 18,057 psi | 53% | 889 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 20,726 psi | 61% | 902 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 21,002 psi | 62% | 1004 fps | 93.2% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,351 psi | 69% | 1047 fps | 89.6% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,653 psi | 58% | 958 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 7,005 psi | 21% | 571 fps | 92.1% |
| ReloadSwiss RS 20*² | 3.8 gr | 60% | 13,387 psi | 39% | 850 fps | 90.7% |
| Rottweil P 801² | <<locked>> | 60% | 23,279 psi | 68% | 984 fps | 100% |
| Rottweil P 806* | <<locked>> | 88% | 20,233 psi | 59% | 1089 fps | 85.2% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 24,395 psi | 72% | 1073 fps | 85.4% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,997 psi | 44% | 840 fps | 90% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,666 psi | 55% | 915 fps | 99.5% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,898 psi | 53% | 902 fps | 96.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 22,785 psi | 67% | 899 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 20,711 psi | 61% | 984 fps | 86.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,361 psi | 51% | 899 fps | 97.9% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 25,933 psi | 76% | 1155 fps | 85.7% |
| Somchem MP200*² | <<locked>> | 60% | 17,622 psi | 52% | 922 fps | 91.4% |
| Somchem MS200*² | <<locked>> | 60% | 16,244 psi | 48% | 879 fps | 92.9% |
| Vihtavuori 3N37*² | <<locked>> | 72% | 19,058 psi | 56% | 981 fps | 86.5% |
| Vihtavuori N320² | <<locked>> | 60% | 18,434 psi | 54% | 912 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,341 psi | 30% | 692 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,187 psi | 50% | 928 fps | 99.1% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,795 psi | 46% | 879 fps | 91.6% |
| Vihtavuori N350*² | <<locked>> | 76% | 18,275 psi | 54% | 961 fps | 86.1% |
| Winchester 231² | <<locked>> | 60% | 23,583 psi | 69% | 1007 fps | 100% |
| Winchester AutoComp ² | 4 gr | 60% | 15,142 psi | 44% | 856 fps | 95.6% |
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 57 powders for 9 mm Para loaded with the .355 | 124gr | X-TREME RP HP. Rottweil P 806 delivers the highest muzzle velocity at 1,234 fps; across all powders the maximum-charge window runs from 764 fps to 1,234 fps. Alliant Herco gives the best case fill at 100 %, and 34 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 36–90 %, 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, Winchester AutoComp rank at the top here: for 9 mm Para with the .355 | 124gr | X-TREME RP HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, Hodgdon HS-6, Hodgdon Longshot burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate No. 5, Accurate Solo 1000 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.