Load Specifications
Load data in caliber .357 Mag. with .355 | 124gr | Limit FMJ bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, SNPE Vectan BA7 1/2 and Vihtavuori N350.
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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 37,579 psi | 86% | 1453 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 35,984 psi | 83% | 1578 fps | 90.2% |
| Accurate Solo 1000² | <<locked>> | 76% | 36,143 psi | 83% | 1332 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 39,204 psi | 90% | 1430 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 38,334 psi | 88% | 1562 fps | 98.4% |
| ADI AP 70N² | <<locked>> | 68% | 37,637 psi | 87% | 1424 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,956 psi | 87% | 1240 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 36,390 psi | 84% | 1257 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 39,291 psi | 90% | 1332 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 35,810 psi | 82% | 1342 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 37,304 psi | 86% | 1394 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 37,652 psi | 87% | 1591 fps | 89.7% |
| Alliant BULLSEYE² | <<locked>> | 72% | 36,956 psi | 85% | 1483 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 38,972 psi | 90% | 1385 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 36,999 psi | 85% | 1480 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 35,737 psi | 82% | 1572 fps | 97.3% |
| Alliant RED DOT | <<locked>> | 80% | 38,116 psi | 88% | 1342 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 37,826 psi | 87% | 1496 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 39,175 psi | 90% | 1516 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 39,131 psi | 90% | 1368 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 36,840 psi | 85% | 1355 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 36,376 psi | 84% | 1358 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,464 psi | 88% | 1280 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 38,261 psi | 88% | 1535 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 37,608 psi | 86% | 1522 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,970 psi | 41% | 1017 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 38,551 psi | 89% | 1437 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 35,984 psi | 83% | 1578 fps | 90.2% |
| Lovex S011² | <<locked>> | 68% | 38,754 psi | 89% | 1394 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 39,218 psi | 90% | 1463 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 36,013 psi | 83% | 1388 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 37,115 psi | 85% | 1401 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 37,637 psi | 87% | 1381 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,724 psi | 84% | 1348 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 36,129 psi | 83% | 1289 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 37,463 psi | 86% | 1493 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 38,841 psi | 89% | 1532 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 36,143 psi | 83% | 1368 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,810 psi | 39% | 1027 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 38,072 psi | 88% | 1493 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 37,217 psi | 86% | 1585 fps | 93.2% |
| Rottweil P 801² | <<locked>> | 64% | 36,390 psi | 84% | 1339 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 37,101 psi | 85% | 1608 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 35,984 psi | 83% | 1578 fps | 90.2% |
| SNPE Vectan A0 | <<locked>> | 84% | 36,564 psi | 84% | 1434 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 37,333 psi | 86% | 1391 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 36,303 psi | 83% | 1398 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,289 psi | 86% | 1270 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 35,694 psi | 82% | 1483 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 35,433 psi | 81% | 1394 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 36,651 psi | 84% | 1591 fps | 98.8% |
| Somchem MP200² | <<locked>> | 76% | 37,884 psi | 87% | 1486 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 36,999 psi | 85% | 1450 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 34,751 psi | 80% | 1519 fps | 95% |
| Vihtavuori 3N37 | <<locked>> | 84% | 39,088 psi | 90% | 1549 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 96% | 36,245 psi | 83% | 1558 fps | 93.6% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 34,330 psi | 79% | 1591 fps | 96.6% |
| Vihtavuori N320² | <<locked>> | 72% | 36,172 psi | 83% | 1345 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 31,763 psi | 73% | 1211 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 39,233 psi | 90% | 1447 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 37,594 psi | 86% | 1457 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 37,565 psi | 86% | 1522 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 36,172 psi | 83% | 1385 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 38,435 psi | 88% | 1440 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% | 23,264 psi | 53% | 1234 fps | 99.6% |
| Accurate No. 7*² | <<locked>> | 68% | 27,311 psi | 63% | 1424 fps | 85.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 24,613 psi | 57% | 1168 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,248 psi | 49% | 1165 fps | 100% |
| ADI AP 100*² | <<locked>> | 64% | 15,911 psi | 37% | 1102 fps | 85.5% |
| ADI AP 70N² | <<locked>> | 60% | 30,327 psi | 70% | 1325 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,905 psi | 62% | 1096 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,483 psi | 59% | 1109 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 24,584 psi | 56% | 1132 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,760 psi | 62% | 1214 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,031 psi | 51% | 1171 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 31,256 psi | 72% | 1483 fps | 86.5% |
| Alliant BULLSEYE² | <<locked>> | 60% | 26,527 psi | 61% | 1319 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,279 psi | 56% | 1175 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,317 psi | 38% | 1093 fps | 98.6% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,523 psi | 47% | 1260 fps | 89.1% |
| Alliant RED DOT² | <<locked>> | 60% | 24,352 psi | 56% | 1148 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 30,414 psi | 70% | 1391 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,973 psi | 51% | 1234 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 23,583 psi | 54% | 1158 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,751 psi | 36% | 1020 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 25,585 psi | 59% | 1217 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,625 psi | 50% | 1043 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 29,892 psi | 69% | 1407 fps | 98.6% |
| Hodgdon Longshot² | <<locked>> | 60% | 32,532 psi | 75% | 1447 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,978 psi | 21% | 764 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,991 psi | 60% | 1257 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 27,311 psi | 63% | 1424 fps | 85.3% |
| Lovex S011² | <<locked>> | 60% | 30,647 psi | 70% | 1293 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,295 psi | 58% | 1266 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,421 psi | 47% | 1142 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,060 psi | 51% | 1178 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,843 psi | 53% | 1165 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,468 psi | 56% | 1175 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,325 psi | 63% | 1171 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 29,356 psi | 67% | 1375 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 33,591 psi | 77% | 1460 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,790 psi | 66% | 1270 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 8,760 psi | 20% | 774 fps | 99.9% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 19,754 psi | 45% | 1198 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 26,498 psi | 61% | 1394 fps | 87.5% |
| Rottweil P 801² | <<locked>> | 60% | 32,227 psi | 74% | 1283 fps | 100% |
| Rottweil P 806*² | 9.6 gr | 60% | 15,650 psi | 36% | 1175 fps | 90.9% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 27,311 psi | 63% | 1424 fps | 85.3% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,870 psi | 46% | 1152 fps | 99.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 24,424 psi | 56% | 1204 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 23,540 psi | 54% | 1207 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,601 psi | 66% | 1158 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7 gr | 60% | 17,260 psi | 40% | 1122 fps | 93% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,757 psi | 55% | 1214 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 22,524 psi | 52% | 1325 fps | 93% |
| Somchem MP200² | <<locked>> | 60% | 24,294 psi | 56% | 1273 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,713 psi | 52% | 1224 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 26,963 psi | 62% | 1378 fps | 91.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 19,827 psi | 46% | 1211 fps | 96.1% |
| Vihtavuori 3N38* | <<locked>> | 80% | 23,453 psi | 54% | 1322 fps | 86.3% |
| Vihtavuori N105* | <<locked>> | 80% | 19,638 psi | 45% | 1289 fps | 87.1% |
| Vihtavuori N320² | <<locked>> | 60% | 25,846 psi | 59% | 1204 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 14,373 psi | 33% | 919 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,121 psi | 58% | 1253 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,104 psi | 51% | 1217 fps | 100% |
| Vihtavuori N350*² | 6.9 gr | 60% | 17,405 psi | 40% | 1152 fps | 94.7% |
| Winchester 231² | <<locked>> | 60% | 32,053 psi | 74% | 1332 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,929 psi | 48% | 1171 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 64 powders for .357 Mag. loaded with the .355 | 124gr | Limit FMJ. Rottweil P 806 delivers the highest muzzle velocity at 1,608 fps; across all powders the maximum-charge window runs from 1,017 fps to 1,608 fps. ADI AP 100 gives the best case fill at 100 %, and 31 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 39–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, 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. Rottweil P 806, SNPE Vectan BA7 1/2, Vihtavuori N350 rank at the top here: for .357 Mag. with the .355 | 124gr | Limit FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Alliant BLUE DOT, Lovex D037.1 burn incompletely and react more sensitively to barrel length and temperature. ADI AP 100, ADI APS 350, ADI APS 450 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.