Load Specifications
Load data in caliber .357 Maximum with .356 | 123gr | LOS RN bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N105, ADI AP 100 and Alliant Herco.
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: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 68% | 39,958 psi | 89% | 1693 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 36,230 psi | 81% | 1824 fps | 96.7% |
| Accurate No. 9*² | <<locked>> | 72% | 36,492 psi | 81% | 1821 fps | 92.2% |
| Accurate Solo 1000² | <<locked>> | 72% | 40,350 psi | 90% | 1578 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 37,971 psi | 84% | 1608 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 36,187 psi | 80% | 1814 fps | 93.3% |
| ADI AP 100 | <<locked>> | 88% | 40,466 psi | 90% | 1821 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 39,900 psi | 89% | 1460 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 38,943 psi | 87% | 1483 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 39,682 psi | 88% | 1532 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 40,524 psi | 90% | 1594 fps | 100% |
| Alliant 2400* | <<locked>> | 84% | 39,508 psi | 88% | 1903 fps | 90.9% |
| Alliant BE-86² | <<locked>> | 72% | 39,885 psi | 89% | 1611 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 88% | 40,567 psi | 90% | 1890 fps | 97.1% |
| Alliant BULLSEYE² | <<locked>> | 64% | 39,073 psi | 87% | 1713 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 40,582 psi | 90% | 1598 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 38,043 psi | 85% | 1686 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 72% | 40,582 psi | 90% | 1880 fps | 100% |
| Alliant RED DOT² | <<locked>> | 72% | 38,856 psi | 86% | 1542 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 72% | 39,334 psi | 87% | 1716 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 37,057 psi | 82% | 1532 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 40,379 psi | 90% | 1578 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 37,536 psi | 83% | 1552 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 38,711 psi | 86% | 1476 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 35,795 psi | 80% | 1916 fps | 90% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 22,553 psi | 50% | 1247 fps | 100% |
| Hodgdon Universal² | <<locked>> | 68% | 40,567 psi | 90% | 1657 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 36,230 psi | 81% | 1824 fps | 96.7% |
| Lovex D037.2*² | <<locked>> | 72% | 37,420 psi | 83% | 1841 fps | 92.7% |
| Lovex S020² | <<locked>> | 64% | 37,565 psi | 84% | 1637 fps | 100% |
| Maxam CSB 1² | <<locked>> | 76% | 39,465 psi | 88% | 1621 fps | 100% |
| Maxam CSB 2² | <<locked>> | 72% | 40,016 psi | 89% | 1614 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 38,957 psi | 87% | 1588 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 37,231 psi | 83% | 1542 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 40,480 psi | 90% | 1529 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 84% | 39,421 psi | 88% | 1906 fps | 92% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 21,640 psi | 48% | 1270 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 38,580 psi | 86% | 1686 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 72% | 38,290 psi | 85% | 1847 fps | 98.6% |
| Rottweil P 806² | <<locked>> | 72% | 36,535 psi | 81% | 1788 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 72% | 37,420 psi | 83% | 1841 fps | 92.7% |
| Shooters World Major Pistol² | <<locked>> | 64% | 36,230 psi | 81% | 1824 fps | 96.7% |
| SNPE Vectan A0² | <<locked>> | 76% | 39,450 psi | 88% | 1670 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 38,667 psi | 86% | 1598 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 37,985 psi | 84% | 1614 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 40,147 psi | 89% | 1499 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 27,688 psi | 62% | 1663 fps | 88.2% |
| SNPE Vectan BA7 1/2 | <<locked>> | 80% | 39,943 psi | 89% | 1752 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 37,913 psi | 84% | 1614 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 64% | 37,594 psi | 84% | 1821 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 36,593 psi | 81% | 1670 fps | 100% |
| Somchem MS200² | <<locked>> | 72% | 40,219 psi | 89% | 1690 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 72% | 39,407 psi | 88% | 1762 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 84% | 39,059 psi | 87% | 1841 fps | 99.1% |
| Vihtavuori N105 | <<locked>> | 88% | 40,103 psi | 89% | 1893 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 34,911 psi | 78% | 1841 fps | 89.4% |
| Vihtavuori N320² | <<locked>> | 64% | 37,173 psi | 83% | 1539 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 39,305 psi | 87% | 1476 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 37,710 psi | 84% | 1608 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 36,709 psi | 82% | 1644 fps | 100% |
| Vihtavuori N350² | <<locked>> | 76% | 38,072 psi | 85% | 1736 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 37,884 psi | 84% | 1617 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 7.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 31,154 psi | 69% | 1565 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 31,053 psi | 69% | 1722 fps | 94.7% |
| Accurate No. 9*² | <<locked>> | 64% | 27,717 psi | 62% | 1644 fps | 87.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 30,371 psi | 68% | 1434 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 27,978 psi | 62% | 1453 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 24,076 psi | 54% | 1552 fps | 86.2% |
| ADI AP 100² | 10.7 gr | 60% | 19,595 psi | 44% | 1394 fps | 95.6% |
| ADI APS 350² | <<locked>> | 60% | 30,690 psi | 68% | 1329 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,834 psi | 66% | 1348 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 30,182 psi | 67% | 1391 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 32,750 psi | 73% | 1480 fps | 100% |
| Alliant 2400*² | <<locked>> | 76% | 31,343 psi | 70% | 1745 fps | 86.7% |
| Alliant BE-86² | <<locked>> | 60% | 28,732 psi | 64% | 1450 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 64% | 21,292 psi | 47% | 1476 fps | 87% |
| Alliant BULLSEYE² | <<locked>> | 60% | 34,896 psi | 78% | 1647 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 30,719 psi | 68% | 1453 fps | 100% |
| Alliant Herco² | 9.7 gr | 60% | 21,408 psi | 48% | 1381 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 28,413 psi | 63% | 1654 fps | 98.8% |
| Alliant RED DOT² | <<locked>> | 60% | 29,341 psi | 65% | 1398 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 28,790 psi | 64% | 1545 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 30,255 psi | 67% | 1430 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 20,711 psi | 46% | 1266 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 33,402 psi | 74% | 1496 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 25,266 psi | 56% | 1266 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 88% | 31,531 psi | 70% | 1831 fps | 87.5% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 11,124 psi | 25% | 951 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 33,170 psi | 74% | 1545 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 31,053 psi | 69% | 1722 fps | 94.7% |
| Lovex D037.2*² | <<locked>> | 64% | 28,456 psi | 63% | 1660 fps | 87.9% |
| Lovex S020² | <<locked>> | 60% | 33,475 psi | 74% | 1578 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 26,353 psi | 59% | 1414 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 29,936 psi | 67% | 1467 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,921 psi | 64% | 1437 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 30,893 psi | 69% | 1447 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 33,083 psi | 74% | 1424 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 76% | 30,487 psi | 68% | 1736 fps | 87.5% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 10,733 psi | 24% | 961 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 27,514 psi | 61% | 1512 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 26,237 psi | 58% | 1604 fps | 94.2% |
| Rottweil P 806² | <<locked>> | 60% | 24,729 psi | 55% | 1568 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 64% | 28,456 psi | 63% | 1660 fps | 87.9% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 31,053 psi | 69% | 1722 fps | 94.7% |
| SNPE Vectan A0² | <<locked>> | 60% | 26,426 psi | 59% | 1460 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 31,430 psi | 70% | 1493 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 30,792 psi | 68% | 1506 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 33,112 psi | 74% | 1401 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 96% | 25,164 psi | 56% | 1604 fps | 86.2% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 23,337 psi | 52% | 1457 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 30,414 psi | 68% | 1499 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 33,054 psi | 74% | 1739 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 32,416 psi | 72% | 1601 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 29,022 psi | 65% | 1519 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 27,775 psi | 62% | 1568 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 19,450 psi | 43% | 1414 fps | 90.2% |
| Vihtavuori N105*² | 12.2 gr | 60% | 17,027 psi | 38% | 1394 fps | 92% |
| Vihtavuori N110* | <<locked>> | 96% | 30,980 psi | 69% | 1765 fps | 87.2% |
| Vihtavuori N320² | <<locked>> | 60% | 33,475 psi | 74% | 1486 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 18,101 psi | 40% | 1125 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 33,533 psi | 75% | 1552 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 29,269 psi | 65% | 1526 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 23,917 psi | 53% | 1483 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 27,572 psi | 61% | 1457 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 62 powders for .357 Maximum loaded with the .356 | 123gr | LOS RN. Hodgdon LilGun delivers the highest muzzle velocity at 1,916 fps; across all powders the maximum-charge window runs from 1,247 fps to 1,916 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, SNPE Vectan BA6 1/2 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. Vihtavuori N105, ADI AP 100, Alliant Herco rank at the top here: for .357 Maximum with the .356 | 123gr | LOS RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 9, Accurate TCM, Alliant 2400 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14 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.