Load Specifications
Load data in caliber .357 Mag. with .355 | 123gr | Geco SOFTPOINT bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, Vihtavuori N350 and ReloadSwiss RS 20.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 35,723 psi | 82% | 1440 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 37,985 psi | 87% | 1568 fps | 99.2% |
| Accurate No. 7* | <<locked>> | 80% | 38,000 psi | 87% | 1621 fps | 90.8% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,290 psi | 88% | 1371 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 37,173 psi | 85% | 1421 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 36,463 psi | 84% | 1545 fps | 97.9% |
| ADI AP 70N² | <<locked>> | 68% | 35,143 psi | 81% | 1414 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,622 psi | 84% | 1234 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,885 psi | 89% | 1296 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 37,231 psi | 86% | 1325 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 37,333 psi | 86% | 1378 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,638 psi | 89% | 1424 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 34,824 psi | 80% | 1558 fps | 88.1% |
| Alliant BULLSEYE² | <<locked>> | 76% | 38,885 psi | 89% | 1519 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 36,811 psi | 85% | 1375 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 37,782 psi | 87% | 1506 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,608 psi | 86% | 1614 fps | 97.7% |
| Alliant RED DOT | <<locked>> | 84% | 38,885 psi | 89% | 1368 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 36,056 psi | 83% | 1486 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 36,724 psi | 84% | 1499 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 37,159 psi | 85% | 1362 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 37,347 psi | 86% | 1378 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 38,174 psi | 88% | 1394 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 80% | 37,231 psi | 86% | 1434 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 37,159 psi | 85% | 1273 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 36,289 psi | 83% | 1522 fps | 99.7% |
| Hodgdon Longshot² | <<locked>> | 64% | 34,780 psi | 80% | 1496 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,751 psi | 36% | 997 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 36,027 psi | 83% | 1424 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,927 psi | 87% | 1568 fps | 99.1% |
| Lovex D037.1* | <<locked>> | 80% | 38,000 psi | 87% | 1621 fps | 90.8% |
| Lovex S011² | <<locked>> | 68% | 37,086 psi | 85% | 1388 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 36,854 psi | 85% | 1453 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,550 psi | 86% | 1421 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 37,086 psi | 85% | 1421 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,522 psi | 89% | 1407 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,695 psi | 87% | 1375 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,276 psi | 88% | 1325 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,505 psi | 82% | 1480 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,042 psi | 83% | 1509 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,796 psi | 85% | 1398 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,388 psi | 33% | 1001 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 35,940 psi | 83% | 1483 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 39,044 psi | 90% | 1624 fps | 93.6% |
| Rottweil P 801² | <<locked>> | 68% | 37,289 psi | 86% | 1365 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 38,101 psi | 88% | 1637 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,927 psi | 87% | 1568 fps | 99.1% |
| Shooters World Major Pistol* | <<locked>> | 80% | 38,000 psi | 87% | 1621 fps | 90.8% |
| SNPE Vectan A0 | <<locked>> | 88% | 38,159 psi | 88% | 1467 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 39,059 psi | 90% | 1421 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,000 psi | 87% | 1434 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 35,998 psi | 83% | 1263 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 36,825 psi | 85% | 1509 fps | 99.9% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 36,840 psi | 85% | 1424 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 37,942 psi | 87% | 1627 fps | 98.9% |
| Somchem MP200² | <<locked>> | 76% | 35,694 psi | 82% | 1476 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 38,508 psi | 89% | 1483 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 36,535 psi | 84% | 1562 fps | 95.4% |
| Vihtavuori 3N37 | <<locked>> | 84% | 36,143 psi | 83% | 1522 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 37,072 psi | 85% | 1581 fps | 93.7% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 30,995 psi | 71% | 1552 fps | 95.1% |
| Vihtavuori N310² | <<locked>> | 64% | 38,914 psi | 89% | 1296 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 36,825 psi | 85% | 1368 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 29,356 psi | 67% | 1201 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 36,840 psi | 85% | 1434 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 39,102 psi | 90% | 1490 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 38,899 psi | 89% | 1552 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,667 psi | 89% | 1427 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,361 psi | 84% | 1427 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 22,147 psi | 51% | 1224 fps | 99.3% |
| Accurate No. 5² | <<locked>> | 60% | 32,561 psi | 75% | 1486 fps | 98% |
| Accurate No. 7*² | <<locked>> | 72% | 28,311 psi | 65% | 1460 fps | 85.7% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,989 psi | 53% | 1155 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,247 psi | 44% | 1145 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 16,114 psi | 37% | 1129 fps | 85.4% |
| ADI AP 70N² | <<locked>> | 60% | 27,818 psi | 64% | 1309 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,440 psi | 58% | 1086 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,091 psi | 55% | 1099 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,351 psi | 54% | 1132 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,613 psi | 57% | 1198 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,957 psi | 46% | 1152 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 31,488 psi | 72% | 1503 fps | 86.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,425 psi | 58% | 1316 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,872 psi | 53% | 1171 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 14,214 psi | 33% | 1056 fps | 97.1% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 18,536 psi | 43% | 1227 fps | 86.9% |
| Alliant RED DOT² | <<locked>> | 60% | 22,205 psi | 51% | 1132 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,645 psi | 66% | 1375 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,624 psi | 45% | 1204 fps | 99.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,611 psi | 50% | 1142 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,692 psi | 31% | 997 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 23,511 psi | 54% | 1201 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 21,350 psi | 49% | 1194 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,146 psi | 46% | 1033 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,224 psi | 63% | 1375 fps | 97.6% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,458 psi | 70% | 1430 fps | 99.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,339 psi | 17% | 741 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 23,525 psi | 54% | 1237 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 32,518 psi | 75% | 1486 fps | 98% |
| Lovex D037.1*² | <<locked>> | 72% | 28,311 psi | 65% | 1460 fps | 85.7% |
| Lovex S011² | <<locked>> | 60% | 28,950 psi | 67% | 1283 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 22,945 psi | 53% | 1247 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 18,434 psi | 42% | 1122 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 19,406 psi | 45% | 1155 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,900 psi | 48% | 1152 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,568 psi | 52% | 1161 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 25,425 psi | 58% | 1158 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 27,441 psi | 63% | 1358 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 31,575 psi | 73% | 1444 fps | 99.6% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,904 psi | 60% | 1250 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,730 psi | 15% | 728 fps | 97.8% |
| ReloadSwiss RS 20² | 6.3 gr | 60% | 17,593 psi | 40% | 1171 fps | 99.9% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 24,410 psi | 56% | 1365 fps | 85.6% |
| Rottweil P 801² | <<locked>> | 60% | 29,530 psi | 68% | 1270 fps | 100% |
| Rottweil P 806*² | 9.4 gr | 60% | 12,430 psi | 29% | 1099 fps | 86% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 32,518 psi | 75% | 1486 fps | 98% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 28,311 psi | 65% | 1460 fps | 85.7% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,666 psi | 43% | 1142 fps | 99.3% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,756 psi | 52% | 1194 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,886 psi | 50% | 1194 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,253 psi | 63% | 1148 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 15,432 psi | 35% | 1089 fps | 90.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,727 psi | 50% | 1198 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 19,899 psi | 46% | 1286 fps | 90.6% |
| Somchem MP200² | <<locked>> | 60% | 22,234 psi | 51% | 1250 fps | 99.7% |
| Somchem MS200² | <<locked>> | 60% | 20,769 psi | 48% | 1201 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 24,047 psi | 55% | 1335 fps | 89% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,709 psi | 41% | 1181 fps | 94.3% |
| Vihtavuori 3N38* | <<locked>> | 84% | 23,772 psi | 55% | 1348 fps | 86.3% |
| Vihtavuori N105* | <<locked>> | 84% | 19,131 psi | 44% | 1296 fps | 86.2% |
| Vihtavuori N310² | <<locked>> | 60% | 34,679 psi | 80% | 1247 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,598 psi | 54% | 1188 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 12,096 psi | 28% | 892 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,858 psi | 53% | 1234 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,015 psi | 46% | 1191 fps | 99.8% |
| Vihtavuori N350*² | 6.8 gr | 60% | 15,403 psi | 35% | 1115 fps | 92.6% |
| Winchester 231² | <<locked>> | 60% | 30,153 psi | 69% | 1319 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,826 psi | 43% | 1148 fps | 100% |
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 27 powders for .357 Mag. loaded with the .355 | 123gr | Geco SOFTPOINT. Rottweil P 806 delivers the highest muzzle velocity at 1,637 fps; across all powders the maximum-charge window runs from 997 fps to 1,637 fps. ADI AP 100 gives the best case fill at 100 %, and 27 of the 27 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 33–90 %, 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. Rottweil P 806, Vihtavuori N350, ReloadSwiss RS 20 rank at the top here: for .357 Mag. with the .355 | 123gr | Geco SOFTPOINT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ReloadSwiss RS 24, Vihtavuori 3N38 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.