Load Specifications
Load data in caliber .357 Mag. with .356 | 124gr | LEE Mold 356-124-TC 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 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.
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Max Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 76% | 35,302 psi | 81% | 1444 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 37,768 psi | 87% | 1575 fps | 99.3% |
| Accurate No. 7* | <<locked>> | 80% | 36,985 psi | 85% | 1614 fps | 90.9% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,101 psi | 88% | 1375 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 36,622 psi | 84% | 1421 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 35,375 psi | 81% | 1535 fps | 97.8% |
| ADI AP 70N² | <<locked>> | 72% | 38,493 psi | 88% | 1463 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 36,796 psi | 85% | 1243 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 37,927 psi | 87% | 1293 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 36,724 psi | 84% | 1329 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 35,694 psi | 82% | 1368 fps | 100% |
| Alliant BE-86 | <<locked>> | 84% | 38,551 psi | 89% | 1430 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 33,866 psi | 78% | 1555 fps | 88.2% |
| Alliant BULLSEYE² | <<locked>> | 76% | 38,479 psi | 88% | 1519 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 36,100 psi | 83% | 1375 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 36,390 psi | 84% | 1499 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 37,318 psi | 86% | 1617 fps | 97.9% |
| Alliant RED DOT | <<locked>> | 84% | 38,334 psi | 88% | 1371 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 35,621 psi | 82% | 1486 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 35,694 psi | 82% | 1496 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 36,637 psi | 84% | 1362 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 37,159 psi | 85% | 1381 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 37,753 psi | 87% | 1398 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 37,072 psi | 85% | 1280 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 35,955 psi | 83% | 1526 fps | 99.7% |
| Hodgdon Longshot² | <<locked>> | 68% | 39,291 psi | 90% | 1565 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 14,402 psi | 33% | 981 fps | 100% |
| Hodgdon Universal | <<locked>> | 80% | 38,493 psi | 88% | 1463 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 37,710 psi | 87% | 1575 fps | 99.3% |
| Lovex D037.1* | <<locked>> | 80% | 36,985 psi | 85% | 1614 fps | 90.9% |
| Lovex S011² | <<locked>> | 68% | 35,897 psi | 83% | 1378 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 35,969 psi | 83% | 1450 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 36,869 psi | 85% | 1421 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 36,912 psi | 85% | 1424 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 38,072 psi | 88% | 1407 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 37,362 psi | 86% | 1378 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,072 psi | 88% | 1329 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 34,664 psi | 80% | 1476 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 35,795 psi | 82% | 1512 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 35,621 psi | 82% | 1394 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 12,749 psi | 29% | 978 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 88% | 38,754 psi | 89% | 1522 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 88% | 38,363 psi | 88% | 1624 fps | 93.8% |
| Rottweil P 801² | <<locked>> | 68% | 36,129 psi | 83% | 1365 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 37,086 psi | 85% | 1634 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 37,710 psi | 87% | 1575 fps | 99.3% |
| Shooters World Major Pistol* | <<locked>> | 80% | 36,985 psi | 85% | 1614 fps | 90.9% |
| SNPE Vectan A0 | <<locked>> | 88% | 37,521 psi | 86% | 1463 fps | 100% |
| SNPE Vectan A1 | <<locked>> | 80% | 39,349 psi | 90% | 1430 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,290 psi | 88% | 1440 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 36,056 psi | 83% | 1270 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 36,506 psi | 84% | 1512 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,014 psi | 85% | 1437 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 37,173 psi | 85% | 1624 fps | 99% |
| Somchem MP200 | <<locked>> | 80% | 39,001 psi | 90% | 1526 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 38,508 psi | 89% | 1493 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 35,491 psi | 82% | 1558 fps | 95.5% |
| Vihtavuori 3N37 | <<locked>> | 84% | 35,781 psi | 82% | 1529 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 36,245 psi | 83% | 1581 fps | 93.8% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 30,139 psi | 69% | 1545 fps | 95.1% |
| Vihtavuori N310² | <<locked>> | 64% | 38,754 psi | 89% | 1302 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 36,274 psi | 83% | 1368 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 28,384 psi | 65% | 1198 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 36,143 psi | 83% | 1434 fps | 100% |
| Vihtavuori N340 | <<locked>> | 84% | 38,247 psi | 88% | 1490 fps | 100% |
| Vihtavuori N350 | <<locked>> | 92% | 38,696 psi | 89% | 1558 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,072 psi | 88% | 1427 fps | 100% |
| Winchester AutoComp | <<locked>> | 88% | 39,305 psi | 90% | 1473 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% | 21,045 psi | 48% | 1214 fps | 99.1% |
| Accurate No. 5² | <<locked>> | 60% | 32,387 psi | 74% | 1493 fps | 98.2% |
| Accurate No. 7*² | <<locked>> | 72% | 27,369 psi | 63% | 1453 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,887 psi | 53% | 1161 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 18,753 psi | 43% | 1145 fps | 100% |
| ADI AP 100*² | <<locked>> | 72% | 17,013 psi | 39% | 1168 fps | 87% |
| ADI AP 70N² | <<locked>> | 60% | 26,803 psi | 62% | 1306 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 24,845 psi | 57% | 1086 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,207 psi | 56% | 1109 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,176 psi | 51% | 1125 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 23,293 psi | 54% | 1188 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 19,160 psi | 44% | 1148 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 30,560 psi | 70% | 1496 fps | 86.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 24,424 psi | 56% | 1306 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 21,596 psi | 50% | 1161 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 13,169 psi | 30% | 1043 fps | 96.4% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 17,680 psi | 41% | 1214 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 21,002 psi | 48% | 1122 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,282 psi | 65% | 1378 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 18,173 psi | 42% | 1184 fps | 99.3% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,147 psi | 49% | 1145 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 12,865 psi | 30% | 991 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 22,553 psi | 52% | 1194 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 19,464 psi | 45% | 1030 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 26,890 psi | 62% | 1381 fps | 97.8% |
| Hodgdon Longshot² | <<locked>> | 60% | 29,428 psi | 68% | 1424 fps | 99.4% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,150 psi | 14% | 719 fps | 99.4% |
| Hodgdon Universal² | <<locked>> | 60% | 21,886 psi | 50% | 1220 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 32,343 psi | 74% | 1493 fps | 98.2% |
| Lovex D037.1*² | <<locked>> | 72% | 27,369 psi | 63% | 1453 fps | 85.6% |
| Lovex S011² | <<locked>> | 60% | 28,761 psi | 66% | 1286 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 21,495 psi | 49% | 1230 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 17,318 psi | 40% | 1109 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,405 psi | 42% | 1148 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,508 psi | 47% | 1155 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,307 psi | 51% | 1165 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 25,280 psi | 58% | 1165 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 26,701 psi | 61% | 1355 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 30,618 psi | 70% | 1437 fps | 99.6% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 24,787 psi | 57% | 1247 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 5,366 psi | 12% | 692 fps | 95% |
| ReloadSwiss RS 20² | 6.5 gr | 60% | 16,926 psi | 39% | 1165 fps | 99.8% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 23,264 psi | 53% | 1352 fps | 85.3% |
| Rottweil P 801² | <<locked>> | 60% | 28,485 psi | 65% | 1266 fps | 100% |
| Rottweil P 806*² | 10.3 gr | 64% | 12,908 psi | 30% | 1129 fps | 87.1% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 32,343 psi | 74% | 1493 fps | 98.2% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 27,369 psi | 63% | 1453 fps | 85.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 17,637 psi | 41% | 1129 fps | 99% |
| SNPE Vectan A1² | <<locked>> | 60% | 22,292 psi | 51% | 1194 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 21,466 psi | 49% | 1194 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,542 psi | 61% | 1145 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 14,620 psi | 34% | 1079 fps | 90.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,132 psi | 49% | 1198 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 18,666 psi | 43% | 1266 fps | 89.9% |
| Somchem MP200² | <<locked>> | 60% | 21,422 psi | 49% | 1247 fps | 99.7% |
| Somchem MS200² | <<locked>> | 60% | 19,508 psi | 45% | 1184 fps | 99.9% |
| Somchem S221*² | <<locked>> | 60% | 23,105 psi | 53% | 1329 fps | 88.8% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 16,795 psi | 39% | 1168 fps | 93.9% |
| Vihtavuori 3N38* | <<locked>> | 84% | 23,061 psi | 53% | 1342 fps | 86.2% |
| Vihtavuori N105* | <<locked>> | 84% | 18,318 psi | 42% | 1286 fps | 85.9% |
| Vihtavuori N310² | <<locked>> | 60% | 34,519 psi | 79% | 1253 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,105 psi | 53% | 1191 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 10,747 psi | 25% | 876 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 21,480 psi | 49% | 1220 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 18,724 psi | 43% | 1175 fps | 99.6% |
| Vihtavuori N350*² | 7 gr | 60% | 14,591 psi | 34% | 1102 fps | 92% |
| Winchester 231² | <<locked>> | 60% | 29,588 psi | 68% | 1319 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 17,912 psi | 41% | 1142 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-TC. Rottweil P 806 delivers the highest muzzle velocity at 1,634 fps; across all powders the maximum-charge window runs from 978 fps to 1,634 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 29–90 %, 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, ReloadSwiss RS 20 rank at the top here: for .357 Mag. with the .356 | 124gr | LEE Mold 356-124-TC 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.