Load Specifications
Load data in caliber .357 Mag. with .356 | 124gr | LEE Mold 356-124-2R bullet and 68 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 SNPE Vectan BA7 1/2.
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% | 35,607 psi | 82% | 1450 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 37,927 psi | 87% | 1578 fps | 99.3% |
| Accurate No. 7* | <<locked>> | 80% | 37,768 psi | 87% | 1631 fps | 91.4% |
| Accurate Solo 1000 | <<locked>> | 80% | 37,521 psi | 86% | 1371 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 36,970 psi | 85% | 1427 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 36,245 psi | 83% | 1555 fps | 98.1% |
| ADI AP 70N² | <<locked>> | 72% | 38,827 psi | 89% | 1470 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 39,291 psi | 90% | 1273 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,305 psi | 88% | 1299 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 36,187 psi | 83% | 1325 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 36,114 psi | 83% | 1375 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,740 psi | 89% | 1434 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 34,534 psi | 79% | 1568 fps | 88.7% |
| Alliant BULLSEYE² | <<locked>> | 76% | 38,827 psi | 89% | 1529 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 36,463 psi | 84% | 1381 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 36,550 psi | 84% | 1503 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,463 psi | 86% | 1621 fps | 98% |
| Alliant RED DOT | <<locked>> | 84% | 37,797 psi | 87% | 1368 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 35,955 psi | 83% | 1493 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 35,969 psi | 83% | 1503 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 37,014 psi | 85% | 1368 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 37,362 psi | 86% | 1388 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 37,869 psi | 87% | 1401 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 37,434 psi | 86% | 1286 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 36,056 psi | 83% | 1529 fps | 99.8% |
| Hodgdon Longshot² | <<locked>> | 64% | 34,621 psi | 80% | 1506 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,707 psi | 34% | 991 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 38,827 psi | 89% | 1470 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,884 psi | 87% | 1578 fps | 99.3% |
| Lovex D037.1* | <<locked>> | 80% | 37,768 psi | 87% | 1631 fps | 91.4% |
| Lovex S011² | <<locked>> | 68% | 36,289 psi | 83% | 1388 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 36,303 psi | 83% | 1457 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 37,173 psi | 85% | 1424 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 37,275 psi | 86% | 1430 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,450 psi | 88% | 1414 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,739 psi | 87% | 1385 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 37,521 psi | 86% | 1329 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 35,679 psi | 82% | 1493 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 35,955 psi | 83% | 1519 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,013 psi | 83% | 1401 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,024 psi | 30% | 984 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 39,015 psi | 90% | 1529 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 39,189 psi | 90% | 1640 fps | 94.2% |
| Rottweil P 801² | <<locked>> | 68% | 36,463 psi | 84% | 1371 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 37,057 psi | 85% | 1637 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,884 psi | 87% | 1578 fps | 99.3% |
| Shooters World Major Pistol* | <<locked>> | 80% | 37,768 psi | 87% | 1631 fps | 91.4% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,753 psi | 87% | 1470 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 35,375 psi | 81% | 1388 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,522 psi | 89% | 1447 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 39,262 psi | 90% | 1309 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 36,651 psi | 84% | 1519 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,275 psi | 86% | 1440 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 37,376 psi | 86% | 1631 fps | 99% |
| Somchem MP200 | <<locked>> | 80% | 39,233 psi | 90% | 1529 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 38,783 psi | 89% | 1499 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 36,303 psi | 83% | 1575 fps | 95.9% |
| Vihtavuori 3N37 | <<locked>> | 84% | 35,911 psi | 83% | 1532 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 37,043 psi | 85% | 1594 fps | 94.2% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 30,966 psi | 71% | 1562 fps | 95.6% |
| Vihtavuori N310² | <<locked>> | 64% | 39,291 psi | 90% | 1309 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 36,695 psi | 84% | 1378 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 28,703 psi | 66% | 1204 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 36,506 psi | 84% | 1437 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 38,522 psi | 89% | 1493 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 38,870 psi | 89% | 1562 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,377 psi | 88% | 1434 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,230 psi | 83% | 1437 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% | 21,422 psi | 49% | 1224 fps | 99.3% |
| Accurate No. 5² | <<locked>> | 60% | 32,547 psi | 75% | 1499 fps | 98.3% |
| Accurate No. 7*² | <<locked>> | 72% | 28,050 psi | 64% | 1467 fps | 86.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,568 psi | 52% | 1158 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,116 psi | 44% | 1155 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 15,490 psi | 36% | 1125 fps | 85.2% |
| ADI AP 70N² | <<locked>> | 60% | 27,195 psi | 63% | 1312 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,353 psi | 58% | 1096 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 23,888 psi | 55% | 1106 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,640 psi | 52% | 1135 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 23,743 psi | 55% | 1198 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,464 psi | 45% | 1155 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 31,227 psi | 72% | 1512 fps | 86.9% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,801 psi | 57% | 1316 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,017 psi | 51% | 1171 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 12,995 psi | 30% | 1040 fps | 96.3% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 17,912 psi | 41% | 1224 fps | 86.8% |
| Alliant RED DOT² | <<locked>> | 60% | 21,480 psi | 49% | 1135 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 27,862 psi | 64% | 1371 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 18,507 psi | 43% | 1194 fps | 99.5% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,538 psi | 50% | 1155 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,126 psi | 30% | 997 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,771 psi | 52% | 1201 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,885 psi | 46% | 1040 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,050 psi | 62% | 1385 fps | 97.9% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,313 psi | 70% | 1437 fps | 99.6% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,092 psi | 14% | 715 fps | 99.4% |
| Hodgdon Universal² | <<locked>> | 60% | 22,263 psi | 51% | 1227 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 32,503 psi | 75% | 1496 fps | 98.3% |
| Lovex D037.1*² | <<locked>> | 72% | 28,050 psi | 64% | 1467 fps | 86.2% |
| Lovex S011² | <<locked>> | 60% | 28,340 psi | 65% | 1283 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,857 psi | 50% | 1240 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 17,666 psi | 41% | 1119 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,797 psi | 43% | 1158 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,233 psi | 47% | 1148 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,002 psi | 51% | 1161 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 24,961 psi | 57% | 1161 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 26,919 psi | 62% | 1362 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 31,488 psi | 72% | 1453 fps | 99.8% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,237 psi | 58% | 1257 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 5,569 psi | 13% | 705 fps | 95.6% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 17,260 psi | 40% | 1175 fps | 99.9% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 23,395 psi | 54% | 1358 fps | 85.4% |
| Rottweil P 801² | <<locked>> | 60% | 28,877 psi | 66% | 1273 fps | 100% |
| Rottweil P 806*² | 10.5 gr | 64% | 13,402 psi | 31% | 1148 fps | 87.9% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 32,503 psi | 75% | 1496 fps | 98.3% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 28,050 psi | 64% | 1467 fps | 86.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,941 psi | 41% | 1138 fps | 99.2% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,582 psi | 52% | 1201 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,770 psi | 50% | 1201 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,977 psi | 62% | 1155 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.2 gr | 60% | 14,823 psi | 34% | 1086 fps | 90.6% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 20,856 psi | 48% | 1191 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,855 psi | 43% | 1273 fps | 90.2% |
| Somchem MP200² | <<locked>> | 60% | 21,727 psi | 50% | 1257 fps | 99.8% |
| Somchem MS200² | <<locked>> | 60% | 19,827 psi | 46% | 1194 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 23,279 psi | 54% | 1339 fps | 89.1% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,027 psi | 39% | 1178 fps | 94.2% |
| Vihtavuori 3N38* | <<locked>> | 84% | 23,177 psi | 53% | 1348 fps | 86.4% |
| Vihtavuori N105* | <<locked>> | 84% | 18,449 psi | 42% | 1289 fps | 86.1% |
| Vihtavuori N310² | <<locked>> | 60% | 35,070 psi | 81% | 1263 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,540 psi | 54% | 1201 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,052 psi | 25% | 886 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 21,857 psi | 50% | 1230 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 19,029 psi | 44% | 1184 fps | 99.7% |
| Vihtavuori N350*² | 7 gr | 60% | 14,388 psi | 33% | 1099 fps | 91.9% |
| Winchester 231² | <<locked>> | 60% | 29,950 psi | 69% | 1325 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,202 psi | 42% | 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 68 powders for .357 Mag. loaded with the .356 | 124gr | LEE Mold 356-124-2R. ReloadSwiss RS 24 delivers the highest muzzle velocity at 1,640 fps; across all powders the maximum-charge window runs from 984 fps to 1,640 fps. ADI AP 100 gives the best case fill at 100 %, and 43 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 30–90 %, leaving at least 10 % headroom. ADI AP 100, Alliant BLUE DOT, Alliant Herco 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, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .356 | 124gr | LEE Mold 356-124-2R 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 APS 350, ADI APS 450, Alliant Herco 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.