Load Specifications
Load data in caliber .357 SIG with .355 | 124gr | CamPro RN bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori 3N37, Alliant UNIQUE and Somchem MP200.
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>> | 88% | 39,537 psi | 89% | 1319 fps | 99.9% |
| Accurate No. 5² | <<locked>> | 72% | 38,116 psi | 86% | 1385 fps | 95.4% |
| Accurate Solo 1000 | <<locked>> | 88% | 37,898 psi | 86% | 1224 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 38,464 psi | 87% | 1289 fps | 100% |
| ADI AP 100*ᴾ | <<locked>> | 100% | 27,209 psi | 62% | 1220 fps | 88.3% |
| ADI AP 70N | <<locked>> | 80% | 38,493 psi | 87% | 1309 fps | 100% |
| ADI APS 350 | <<locked>> | 84% | 37,434 psi | 85% | 1106 fps | 100% |
| ADI APS 450 | <<locked>> | 88% | 39,784 psi | 90% | 1165 fps | 100% |
| ADI AS 30 | <<locked>> | 92% | 39,189 psi | 89% | 1211 fps | 100% |
| ADI AS 50N | <<locked>> | 88% | 38,972 psi | 88% | 1253 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 36,941 psi | 84% | 1266 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 37,521 psi | 85% | 1345 fps | 100% |
| Alliant Green Dot | <<locked>> | 92% | 39,653 psi | 90% | 1263 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 28,718 psi | 65% | 1230 fps | 99.7% |
| Alliant POWER PISTOL* | <<locked>> | 96% | 38,421 psi | 87% | 1434 fps | 93% |
| Alliant RED DOT | <<locked>> | 92% | 36,912 psi | 83% | 1207 fps | 100% |
| Alliant Sport Pistol | <<locked>> | 80% | 39,537 psi | 89% | 1371 fps | 100% |
| Alliant UNIQUE | <<locked>> | 96% | 37,347 psi | 84% | 1355 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 36,405 psi | 82% | 1214 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 29,472 psi | 67% | 1158 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 36,637 psi | 83% | 1243 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 92% | 38,899 psi | 88% | 1309 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,971 psi | 86% | 1125 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 39,639 psi | 90% | 1283 fps | 100% |
| Hodgdon HS-6 | <<locked>> | 80% | 39,987 psi | 90% | 1394 fps | 97.5% |
| Hodgdon Longshot² | <<locked>> | 76% | 39,233 psi | 89% | 1385 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 12,212 psi | 28% | 820 fps | 100% |
| Hodgdon Universal | <<locked>> | 88% | 37,231 psi | 84% | 1296 fps | 100% |
| Lovex D036² | <<locked>> | 72% | 38,058 psi | 86% | 1385 fps | 95.3% |
| Lovex S011² | <<locked>> | 76% | 37,376 psi | 84% | 1247 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 38,928 psi | 88% | 1325 fps | 100% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 38,203 psi | 86% | 1283 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 37,202 psi | 84% | 1289 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 36,622 psi | 83% | 1243 fps | 100% |
| Maxam CSB 4 | <<locked>> | 92% | 39,682 psi | 90% | 1257 fps | 100% |
| Maxam CSB 5 | <<locked>> | 84% | 37,536 psi | 85% | 1184 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 39,581 psi | 89% | 1371 fps | 100% |
| Ramshot True Blue² | <<locked>> | 72% | 36,622 psi | 83% | 1345 fps | 98% |
| Ramshot Zip² | <<locked>> | 68% | 38,218 psi | 86% | 1280 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 38,435 psi | 87% | 1286 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 11,139 psi | 25% | 814 fps | 99.3% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 39,668 psi | 90% | 1378 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 36,811 psi | 83% | 1230 fps | 100% |
| Rottweil P 806ᴾ | <<locked>> | 100% | 30,763 psi | 70% | 1378 fps | 95.4% |
| Shooters World Auto Pistol² | <<locked>> | 72% | 38,058 psi | 86% | 1385 fps | 95.3% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 39,624 psi | 90% | 1325 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 88% | 38,174 psi | 86% | 1266 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 36,970 psi | 84% | 1273 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 80% | 37,101 psi | 84% | 1138 fps | 100% |
| SNPE Vectan BA7 1/2ᴾ | <<locked>> | 100% | 34,476 psi | 78% | 1306 fps | 96.9% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 39,668 psi | 90% | 1312 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 92% | 38,580 psi | 87% | 1453 fps | 95% |
| Somchem MP200 | <<locked>> | 88% | 37,391 psi | 85% | 1339 fps | 100% |
| Somchem MS200 | <<locked>> | 92% | 36,651 psi | 83% | 1309 fps | 100% |
| Somchem S221* | <<locked>> | 80% | 35,143 psi | 79% | 1352 fps | 88.6% |
| Vihtavuori 3N37 | <<locked>> | 96% | 37,637 psi | 85% | 1375 fps | 98.5% |
| Vihtavuori N310² | <<locked>> | 68% | 37,086 psi | 84% | 1142 fps | 100% |
| Vihtavuori N320 | <<locked>> | 88% | 39,798 psi | 90% | 1263 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 22,626 psi | 51% | 1001 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 37,826 psi | 86% | 1306 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 36,637 psi | 83% | 1309 fps | 100% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 35,172 psi | 80% | 1339 fps | 98.2% |
| Winchester 231² | <<locked>> | 76% | 38,218 psi | 86% | 1280 fps | 100% |
| Winchester 572² | <<locked>> | 68% | 39,102 psi | 88% | 1391 fps | 98.1% |
| Winchester AutoComp | <<locked>> | 96% | 38,218 psi | 86% | 1306 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% | 17,289 psi | 39% | 978 fps | 92.4% |
| Accurate No. 5*² | <<locked>> | 60% | 24,961 psi | 56% | 1181 fps | 89% |
| Accurate Solo 1000² | <<locked>> | 60% | 19,363 psi | 44% | 971 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 15,534 psi | 35% | 942 fps | 98.6% |
| ADI AP 100* | <<locked>> | 96% | 24,801 psi | 56% | 1175 fps | 86.5% |
| ADI AP 70N² | <<locked>> | 60% | 21,843 psi | 49% | 1079 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 22,481 psi | 51% | 925 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 20,204 psi | 46% | 925 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 18,898 psi | 43% | 942 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 20,349 psi | 46% | 1004 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 15,708 psi | 36% | 948 fps | 99.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 20,073 psi | 45% | 1066 fps | 97.6% |
| Alliant Green Dot² | <<locked>> | 60% | 18,405 psi | 42% | 971 fps | 100% |
| Alliant Herco*² | <<locked>> | 60% | 10,921 psi | 25% | 830 fps | 87.5% |
| Alliant POWER PISTOL* | <<locked>> | 80% | 25,179 psi | 57% | 1217 fps | 85.9% |
| Alliant RED DOT² | <<locked>> | 60% | 18,144 psi | 41% | 945 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 22,640 psi | 51% | 1119 fps | 98.2% |
| Alliant UNIQUE*² | 4.3 gr | 60% | 15,345 psi | 35% | 965 fps | 93.4% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 17,825 psi | 40% | 955 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 10,675 psi | 24% | 814 fps | 99.3% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 17,840 psi | 40% | 988 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 16,926 psi | 38% | 978 fps | 98.9% |
| Hodgdon Clays² | <<locked>> | 60% | 22,698 psi | 51% | 942 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 30,240 psi | 68% | 1178 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 60% | 20,552 psi | 46% | 1086 fps | 88.1% |
| Hodgdon Longshot*² | <<locked>> | 60% | 22,626 psi | 51% | 1132 fps | 92% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 5,729 psi | 13% | 591 fps | 95.5% |
| Hodgdon Universal² | <<locked>> | 60% | 17,854 psi | 40% | 1001 fps | 99.7% |
| Lovex D036*² | <<locked>> | 60% | 24,918 psi | 56% | 1181 fps | 89% |
| Lovex S011² | <<locked>> | 60% | 23,612 psi | 53% | 1070 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 17,274 psi | 39% | 1001 fps | 97.2% |
| Maxam CSB 1² | <<locked>> | 60% | 14,315 psi | 32% | 906 fps | 97.9% |
| Maxam CSB 2² | <<locked>> | 60% | 14,388 psi | 33% | 942 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 16,737 psi | 38% | 951 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 17,999 psi | 41% | 961 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 21,002 psi | 47% | 974 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 20,813 psi | 47% | 1086 fps | 95.5% |
| Ramshot True Blue*² | <<locked>> | 60% | 23,902 psi | 54% | 1148 fps | 92.9% |
| Ramshot Zip² | <<locked>> | 60% | 30,139 psi | 68% | 1184 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 19,406 psi | 44% | 1033 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 60% | 5,555 psi | 13% | 587 fps | 90.3% |
| ReloadSwiss RS 20*² | <<locked>> | 60% | 13,097 psi | 30% | 925 fps | 93.3% |
| Rottweil P 801² | <<locked>> | 60% | 22,843 psi | 52% | 1056 fps | 100% |
| Rottweil P 806* | <<locked>> | 84% | 18,478 psi | 42% | 1152 fps | 86.9% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 24,918 psi | 56% | 1181 fps | 89% |
| SNPE Vectan A0*² | <<locked>> | 60% | 14,359 psi | 32% | 906 fps | 92.1% |
| SNPE Vectan A1² | <<locked>> | 60% | 18,594 psi | 42% | 991 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 17,796 psi | 40% | 981 fps | 98.5% |
| SNPE Vectan BA10² | <<locked>> | 60% | 23,148 psi | 52% | 971 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 72% | 16,810 psi | 38% | 991 fps | 85.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 17,347 psi | 39% | 981 fps | 99.2% |
| SNPE Vectan SP 2*² | <<locked>> | 76% | 23,279 psi | 53% | 1211 fps | 87% |
| Somchem MP200*² | 4.9 gr | 60% | 17,753 psi | 40% | 1014 fps | 94.2% |
| Somchem MS200² | <<locked>> | 60% | 16,114 psi | 36% | 961 fps | 95.2% |
| Somchem S221*² | <<locked>> | 76% | 30,487 psi | 69% | 1283 fps | 86.2% |
| Vihtavuori 3N37*² | 5.9 gr | 68% | 17,143 psi | 39% | 1027 fps | 87.8% |
| Vihtavuori N310² | <<locked>> | 60% | 28,776 psi | 65% | 1053 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 18,985 psi | 43% | 997 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 9,210 psi | 21% | 732 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 17,187 psi | 39% | 1007 fps | 99.9% |
| Vihtavuori N340*² | <<locked>> | 60% | 15,490 psi | 35% | 955 fps | 94% |
| Vihtavuori N350*² | <<locked>> | 68% | 14,736 psi | 33% | 965 fps | 85.3% |
| Winchester 231² | <<locked>> | 60% | 24,236 psi | 55% | 1099 fps | 100% |
| Winchester 572² | <<locked>> | 60% | 29,530 psi | 67% | 1260 fps | 95.1% |
| Winchester AutoComp ² | <<locked>> | 60% | 15,011 psi | 34% | 938 fps | 97.4% |
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 65 powders for .357 SIG loaded with the .355 | 124gr | CamPro RN. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,453 fps; across all powders the maximum-charge window runs from 814 fps to 1,453 fps. ADI AP 100 gives the best case fill at 100 %, and 53 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 25–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant Herco, Baschieri & Pellagri 102 Pistol 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. Vihtavuori 3N37, Alliant UNIQUE, Somchem MP200 rank at the top here: for .357 SIG with the .355 | 124gr | CamPro RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, Somchem S221 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.