Load Specifications
Load data in caliber 9 x 21 with .357 | 125gr | CamPro bullet and 61 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: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 84% | 30,269 psi | 89% | 1125 fps | 97.5% |
| Accurate No. 5*² | <<locked>> | 68% | 28,195 psi | 83% | 1158 fps | 88.8% |
| Accurate Solo 1000 | <<locked>> | 84% | 30,298 psi | 89% | 1073 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 88% | 28,166 psi | 83% | 1102 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 29,718 psi | 87% | 1138 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 28,979 psi | 85% | 955 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 30,226 psi | 89% | 1001 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 30,734 psi | 90% | 1056 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 28,732 psi | 84% | 1073 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 28,906 psi | 85% | 1109 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 30,023 psi | 88% | 1171 fps | 99.6% |
| Alliant Green Dot | <<locked>> | 84% | 29,602 psi | 87% | 1086 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 24,976 psi | 73% | 1106 fps | 98.1% |
| Alliant RED DOT | <<locked>> | 84% | 28,050 psi | 82% | 1043 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 27,688 psi | 81% | 1138 fps | 98.8% |
| Alliant UNIQUE | <<locked>> | 92% | 29,892 psi | 88% | 1181 fps | 99.4% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 29,501 psi | 87% | 1073 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 24,685 psi | 72% | 1040 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 28,863 psi | 85% | 1096 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 27,093 psi | 79% | 1106 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 28,674 psi | 84% | 984 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 30,501 psi | 89% | 1184 fps | 92.4% |
| Hodgdon Longshot*² | <<locked>> | 72% | 29,283 psi | 86% | 1168 fps | 93.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,573 psi | 31% | 738 fps | 99.9% |
| Hodgdon Universal | <<locked>> | 84% | 29,718 psi | 87% | 1138 fps | 100% |
| Lovex D036*² | <<locked>> | 68% | 28,137 psi | 83% | 1158 fps | 88.7% |
| Lovex S011² | <<locked>> | 72% | 28,935 psi | 85% | 1079 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 30,356 psi | 89% | 1155 fps | 99.9% |
| Maxam CSB 1 | <<locked>> | 96% | 30,037 psi | 88% | 1122 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 29,254 psi | 86% | 1138 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 29,704 psi | 87% | 1099 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 29,414 psi | 86% | 1079 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 28,413 psi | 83% | 1024 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 30,400 psi | 89% | 1178 fps | 98.2% |
| Ramshot True Blue*² | <<locked>> | 68% | 26,774 psi | 79% | 1125 fps | 92.5% |
| Ramshot Zip² | <<locked>> | 64% | 29,776 psi | 87% | 1112 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 29,878 psi | 88% | 1132 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,181 psi | 27% | 715 fps | 96.4% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 29,805 psi | 87% | 1191 fps | 100% |
| Rottweil P 801² | <<locked>> | 72% | 28,340 psi | 83% | 1079 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 23,844 psi | 70% | 1194 fps | 89.7% |
| Shooters World Auto Pistol*² | <<locked>> | 68% | 28,137 psi | 83% | 1158 fps | 88.7% |
| SNPE Vectan A0 | <<locked>> | 92% | 28,210 psi | 83% | 1109 fps | 98.7% |
| SNPE Vectan A1 | <<locked>> | 80% | 27,659 psi | 81% | 1076 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 30,023 psi | 88% | 1115 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 28,805 psi | 85% | 988 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 29,341 psi | 86% | 1152 fps | 93% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 27,934 psi | 82% | 1106 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 88% | 27,195 psi | 80% | 1207 fps | 87.6% |
| Somchem MP200 | <<locked>> | 84% | 29,660 psi | 87% | 1161 fps | 98.5% |
| Somchem MS200 | <<locked>> | 88% | 29,240 psi | 86% | 1138 fps | 99.6% |
| Vihtavuori 3N37* | <<locked>> | 92% | 28,340 psi | 83% | 1168 fps | 93.9% |
| Vihtavuori N310² | <<locked>> | 64% | 29,501 psi | 87% | 1007 fps | 100% |
| Vihtavuori N320 | <<locked>> | 80% | 27,441 psi | 81% | 1066 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 19,972 psi | 59% | 915 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 28,718 psi | 84% | 1138 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 29,124 psi | 85% | 1142 fps | 99.2% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 29,994 psi | 88% | 1188 fps | 95% |
| Winchester 231² | <<locked>> | 72% | 29,776 psi | 87% | 1112 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 29,733 psi | 87% | 1181 fps | 93.3% |
| Winchester AutoComp | <<locked>> | 92% | 30,023 psi | 88% | 1142 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 60% | 14,678 psi | 43% | 856 fps | 87.4% |
| Accurate No. 5*² | <<locked>> | 64% | 25,193 psi | 74% | 1109 fps | 86.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 17,361 psi | 51% | 883 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 13,213 psi | 39% | 833 fps | 95.5% |
| ADI AP 70N² | <<locked>> | 60% | 18,913 psi | 55% | 971 fps | 99.5% |
| ADI APS 350² | <<locked>> | 60% | 19,450 psi | 57% | 833 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 18,927 psi | 56% | 853 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 17,347 psi | 51% | 866 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,477 psi | 51% | 902 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 13,416 psi | 39% | 846 fps | 98% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 17,129 psi | 50% | 942 fps | 94.1% |
| Alliant Green Dot² | <<locked>> | 60% | 16,375 psi | 48% | 879 fps | 100% |
| Alliant Herco*² | <<locked>> | 64% | 10,834 psi | 32% | 784 fps | 85.2% |
| Alliant RED DOT² | <<locked>> | 60% | 16,331 psi | 48% | 866 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 19,290 psi | 57% | 988 fps | 94.9% |
| Alliant UNIQUE*² | 3.4 gr | 60% | 12,720 psi | 37% | 843 fps | 88.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 15,287 psi | 45% | 856 fps | 99.6% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 8,862 psi | 26% | 719 fps | 96.7% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 15,273 psi | 45% | 889 fps | 99.9% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 23,931 psi | 70% | 1060 fps | 99.8% |
| Hodgdon Clays² | <<locked>> | 60% | 14,982 psi | 44% | 787 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 20,218 psi | 59% | 1014 fps | 85.5% |
| Hodgdon Longshot*² | <<locked>> | 60% | 19,928 psi | 58% | 1010 fps | 87.6% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 5,120 psi | 15% | 531 fps | 92% |
| Hodgdon Universal² | <<locked>> | 60% | 15,534 psi | 46% | 899 fps | 98% |
| Lovex D036*² | <<locked>> | 64% | 25,135 psi | 74% | 1109 fps | 86.8% |
| Lovex S011² | <<locked>> | 60% | 20,494 psi | 60% | 958 fps | 99.9% |
| Lovex S020*² | <<locked>> | 60% | 14,620 psi | 43% | 886 fps | 93.5% |
| Maxam CSB 1² | <<locked>> | 60% | 12,734 psi | 37% | 817 fps | 95.1% |
| Maxam CSB 2² | <<locked>> | 60% | 11,705 psi | 34% | 833 fps | 98.6% |
| Maxam CSB 3² | <<locked>> | 60% | 14,852 psi | 44% | 863 fps | 99.5% |
| Maxam CSB 4² | <<locked>> | 60% | 15,896 psi | 47% | 873 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 18,405 psi | 54% | 886 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 17,883 psi | 52% | 965 fps | 91.4% |
| Ramshot True Blue*² | <<locked>> | 60% | 20,436 psi | 60% | 1014 fps | 88.1% |
| Ramshot Zip² | <<locked>> | 60% | 26,150 psi | 77% | 1066 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 16,621 psi | 49% | 938 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 64% | 5,294 psi | 16% | 548 fps | 87.2% |
| ReloadSwiss RS 20*² | 3.6 gr | 60% | 11,502 psi | 34% | 823 fps | 88.6% |
| Rottweil P 801² | <<locked>> | 60% | 19,421 psi | 57% | 955 fps | 100% |
| Rottweil P 806* | <<locked>> | 96% | 20,566 psi | 60% | 1132 fps | 87% |
| Shooters World Auto Pistol*² | <<locked>> | 64% | 25,135 psi | 74% | 1109 fps | 86.8% |
| SNPE Vectan A0*² | <<locked>> | 60% | 12,647 psi | 37% | 807 fps | 87.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 16,244 psi | 48% | 889 fps | 98.9% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 15,534 psi | 46% | 876 fps | 95.7% |
| SNPE Vectan BA10² | <<locked>> | 60% | 21,147 psi | 62% | 889 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 84% | 20,160 psi | 59% | 1001 fps | 86.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 14,533 psi | 43% | 866 fps | 96.4% |
| SNPE Vectan SP 2* | <<locked>> | 84% | 24,236 psi | 71% | 1158 fps | 85.5% |
| Somchem MP200*² | <<locked>> | 60% | 14,982 psi | 44% | 889 fps | 89.5% |
| Somchem MS200*² | <<locked>> | 60% | 14,286 psi | 42% | 863 fps | 91.5% |
| Vihtavuori 3N37*² | <<locked>> | 76% | 18,159 psi | 53% | 991 fps | 86.6% |
| Vihtavuori N310² | <<locked>> | 60% | 25,019 psi | 73% | 955 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 15,969 psi | 47% | 892 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,716 psi | 23% | 656 fps | 99.9% |
| Vihtavuori N330² | <<locked>> | 60% | 14,127 psi | 41% | 892 fps | 97.9% |
| Vihtavuori N340*² | 3.6 gr | 60% | 13,111 psi | 38% | 840 fps | 89.2% |
| Vihtavuori N350* | <<locked>> | 80% | 17,405 psi | 51% | 971 fps | 86.1% |
| Winchester 231² | <<locked>> | 60% | 20,798 psi | 61% | 984 fps | 99.9% |
| Winchester 572*² | <<locked>> | 60% | 25,324 psi | 74% | 1112 fps | 90.8% |
| Winchester AutoComp *² | <<locked>> | 60% | 12,966 psi | 38% | 837 fps | 94.1% |
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 61 powders for 9 x 21 loaded with the .357 | 125gr | CamPro. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,207 fps; across all powders the maximum-charge window runs from 715 fps to 1,207 fps. Alliant Herco gives the best case fill at 100 %, and 42 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 27–90 %, 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 x 21 with the .357 | 125gr | CamPro 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.