Load Specifications
Load data in caliber .357 Mag. with .356 | 125gr | LEE Mold 356-125-2R 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, 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% | 37,144 psi | 85% | 1470 fps | 100% |
| Accurate No. 5² | <<locked>> | 64% | 38,885 psi | 89% | 1594 fps | 99.6% |
| Accurate No. 7* | <<locked>> | 80% | 39,146 psi | 90% | 1654 fps | 92.3% |
| Accurate Solo 1000 | <<locked>> | 80% | 38,145 psi | 88% | 1378 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 84% | 37,507 psi | 86% | 1434 fps | 100% |
| ADI AP 100ᴾ | <<locked>> | 100% | 37,144 psi | 85% | 1568 fps | 98.5% |
| ADI AP 70N² | <<locked>> | 68% | 34,998 psi | 80% | 1424 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 37,072 psi | 85% | 1250 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 38,885 psi | 89% | 1306 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 36,927 psi | 85% | 1332 fps | 100% |
| ADI AS 50N² | <<locked>> | 76% | 36,796 psi | 85% | 1381 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 35,694 psi | 82% | 1398 fps | 100% |
| Alliant BLUE DOT*ᴾ | <<locked>> | 100% | 35,853 psi | 82% | 1591 fps | 89.7% |
| Alliant BULLSEYE² | <<locked>> | 72% | 35,795 psi | 82% | 1490 fps | 100% |
| Alliant Green Dot | <<locked>> | 80% | 37,159 psi | 85% | 1391 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 37,579 psi | 86% | 1516 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 84% | 38,464 psi | 88% | 1637 fps | 98.4% |
| Alliant RED DOT | <<locked>> | 84% | 38,566 psi | 89% | 1375 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 68% | 36,506 psi | 84% | 1503 fps | 100% |
| Alliant UNIQUE | <<locked>> | 84% | 37,304 psi | 86% | 1519 fps | 100% |
| Baschieri & Pellagri 100 | <<locked>> | 80% | 37,565 psi | 86% | 1375 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 38,508 psi | 89% | 1398 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 76% | 38,696 psi | 89% | 1407 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 38,000 psi | 87% | 1293 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 68% | 36,956 psi | 85% | 1542 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 35,592 psi | 82% | 1519 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,302 psi | 35% | 1001 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 35,868 psi | 82% | 1434 fps | 100% |
| Lovex D036² | <<locked>> | 64% | 38,827 psi | 89% | 1594 fps | 99.6% |
| Lovex D037.1* | <<locked>> | 80% | 39,146 psi | 90% | 1654 fps | 92.3% |
| Lovex S011² | <<locked>> | 68% | 36,883 psi | 85% | 1394 fps | 100% |
| Lovex S020² | <<locked>> | 76% | 37,782 psi | 87% | 1473 fps | 100% |
| Maxam CSB 1 | <<locked>> | 88% | 38,537 psi | 89% | 1440 fps | 100% |
| Maxam CSB 2 | <<locked>> | 84% | 37,913 psi | 87% | 1437 fps | 100% |
| Maxam CSB 3 | <<locked>> | 84% | 39,015 psi | 90% | 1421 fps | 100% |
| Maxam CSB 4 | <<locked>> | 80% | 38,377 psi | 88% | 1391 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 38,261 psi | 88% | 1335 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 68% | 36,013 psi | 83% | 1496 fps | 100% |
| Ramshot True Blue² | <<locked>> | 64% | 36,898 psi | 85% | 1532 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 72% | 36,724 psi | 84% | 1407 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,561 psi | 31% | 997 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 84% | 36,782 psi | 85% | 1499 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 84% | 36,100 psi | 83% | 1594 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 68% | 37,101 psi | 85% | 1378 fps | 100% |
| Rottweil P 806 | <<locked>> | 92% | 39,247 psi | 90% | 1660 fps | 100% |
| Shooters World Auto Pistol² | <<locked>> | 64% | 38,827 psi | 89% | 1594 fps | 99.6% |
| Shooters World Major Pistol* | <<locked>> | 80% | 39,146 psi | 90% | 1654 fps | 92.3% |
| SNPE Vectan A0 | <<locked>> | 88% | 38,943 psi | 90% | 1483 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 36,535 psi | 84% | 1401 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 80% | 38,870 psi | 89% | 1450 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 37,057 psi | 85% | 1286 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 92% | 37,507 psi | 86% | 1529 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 80% | 37,768 psi | 87% | 1447 fps | 100% |
| SNPE Vectan SP 2 | <<locked>> | 80% | 39,262 psi | 90% | 1657 fps | 99.5% |
| Somchem MP200² | <<locked>> | 76% | 36,216 psi | 83% | 1493 fps | 100% |
| Somchem MS200 | <<locked>> | 84% | 39,189 psi | 90% | 1503 fps | 100% |
| Somchem S221² | <<locked>> | 72% | 36,999 psi | 85% | 1585 fps | 96.4% |
| Vihtavuori 3N37 | <<locked>> | 84% | 36,941 psi | 85% | 1545 fps | 100% |
| Vihtavuori 3N38*ᴾ | <<locked>> | 100% | 37,753 psi | 87% | 1604 fps | 94.7% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 31,836 psi | 73% | 1575 fps | 96.2% |
| Vihtavuori N310² | <<locked>> | 64% | 39,059 psi | 90% | 1309 fps | 100% |
| Vihtavuori N320² | <<locked>> | 76% | 37,405 psi | 86% | 1385 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 29,254 psi | 67% | 1211 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 37,072 psi | 85% | 1444 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 36,216 psi | 83% | 1467 fps | 100% |
| Vihtavuori N350 | <<locked>> | 88% | 35,650 psi | 82% | 1522 fps | 100% |
| Winchester 231² | <<locked>> | 68% | 38,856 psi | 89% | 1440 fps | 100% |
| Winchester AutoComp | <<locked>> | 84% | 36,492 psi | 84% | 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% | 22,046 psi | 51% | 1237 fps | 99.6% |
| Accurate No. 5² | <<locked>> | 60% | 33,533 psi | 77% | 1516 fps | 98.7% |
| Accurate No. 7*² | <<locked>> | 72% | 28,718 psi | 66% | 1483 fps | 87.1% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,351 psi | 54% | 1171 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,174 psi | 44% | 1155 fps | 100% |
| ADI AP 100*² | <<locked>> | 68% | 15,853 psi | 36% | 1135 fps | 86.1% |
| ADI AP 70N² | <<locked>> | 60% | 27,876 psi | 64% | 1322 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 25,440 psi | 58% | 1096 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,671 psi | 57% | 1119 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,756 psi | 52% | 1135 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,526 psi | 56% | 1211 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 20,001 psi | 46% | 1165 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 92% | 28,819 psi | 66% | 1470 fps | 85.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,483 psi | 59% | 1325 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,089 psi | 51% | 1171 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 13,460 psi | 31% | 1053 fps | 96.9% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 18,333 psi | 42% | 1234 fps | 87.6% |
| Alliant RED DOT² | <<locked>> | 60% | 21,654 psi | 50% | 1135 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 28,485 psi | 65% | 1381 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,131 psi | 44% | 1207 fps | 99.7% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,582 psi | 50% | 1155 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,227 psi | 30% | 997 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 23,670 psi | 54% | 1214 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,001 psi | 46% | 1040 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,978 psi | 64% | 1404 fps | 98.4% |
| Hodgdon Longshot² | <<locked>> | 60% | 30,603 psi | 70% | 1444 fps | 99.7% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,280 psi | 14% | 722 fps | 99.7% |
| Hodgdon Universal² | <<locked>> | 60% | 22,960 psi | 53% | 1240 fps | 100% |
| Lovex D036² | <<locked>> | 60% | 33,489 psi | 77% | 1512 fps | 98.7% |
| Lovex D037.1*² | <<locked>> | 72% | 28,718 psi | 66% | 1483 fps | 87.1% |
| Lovex S011² | <<locked>> | 60% | 29,051 psi | 67% | 1293 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 22,495 psi | 52% | 1250 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 18,304 psi | 42% | 1132 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 18,927 psi | 44% | 1158 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 20,958 psi | 48% | 1161 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,785 psi | 52% | 1175 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 25,831 psi | 59% | 1175 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,021 psi | 64% | 1378 fps | 100% |
| Ramshot True Blue² | <<locked>> | 60% | 31,778 psi | 73% | 1457 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 25,280 psi | 58% | 1253 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 5,744 psi | 13% | 712 fps | 96.2% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 17,854 psi | 41% | 1188 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 72% | 24,163 psi | 56% | 1375 fps | 86.5% |
| Rottweil P 801² | <<locked>> | 60% | 29,588 psi | 68% | 1283 fps | 100% |
| Rottweil P 806*² | 10.1 gr | 60% | 11,821 psi | 27% | 1089 fps | 85.6% |
| Shooters World Auto Pistol² | <<locked>> | 60% | 33,489 psi | 77% | 1512 fps | 98.7% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 28,718 psi | 66% | 1483 fps | 87.1% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,478 psi | 42% | 1152 fps | 99.5% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,119 psi | 53% | 1211 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,292 psi | 51% | 1211 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 26,948 psi | 62% | 1155 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.4 gr | 60% | 15,200 psi | 35% | 1099 fps | 91.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,495 psi | 49% | 1204 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 19,348 psi | 44% | 1286 fps | 91% |
| Somchem MP200² | <<locked>> | 60% | 22,263 psi | 51% | 1266 fps | 99.9% |
| Somchem MS200² | <<locked>> | 60% | 20,436 psi | 47% | 1207 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 24,018 psi | 55% | 1352 fps | 90% |
| Vihtavuori 3N37*² | <<locked>> | 60% | 17,463 psi | 40% | 1188 fps | 94.8% |
| Vihtavuori 3N38* | <<locked>> | 80% | 21,379 psi | 49% | 1309 fps | 85.3% |
| Vihtavuori N105* | <<locked>> | 84% | 19,189 psi | 44% | 1312 fps | 87.5% |
| Vihtavuori N310² | <<locked>> | 60% | 34,954 psi | 80% | 1263 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 23,612 psi | 54% | 1198 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,240 psi | 26% | 889 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,582 psi | 52% | 1240 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 19,638 psi | 45% | 1198 fps | 99.9% |
| Vihtavuori N350*² | 7.2 gr | 60% | 14,852 psi | 34% | 1112 fps | 92.8% |
| Winchester 231² | <<locked>> | 60% | 30,530 psi | 70% | 1335 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 18,666 psi | 43% | 1158 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 | 125gr | LEE Mold 356-125-2R. Rottweil P 806 delivers the highest muzzle velocity at 1,660 fps; across all powders the maximum-charge window runs from 997 fps to 1,660 fps. ADI AP 100 gives the best case fill at 100 %, and 40 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 31–90 %, 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, SNPE Vectan BA7 1/2, Vihtavuori N350 rank at the top here: for .357 Mag. with the .356 | 125gr | LEE Mold 356-125-2R 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.