Load Specifications
Load data in caliber .357 Maximum with .356 | 145gr | LOS RN bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N32C Tin Star, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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 4100* | <<locked>> | 84% | 39,030 psi | 87% | 1729 fps | 90.3% |
| Accurate No. 2² | <<locked>> | 64% | 37,347 psi | 83% | 1503 fps | 100% |
| Accurate No. 7² | <<locked>> | 64% | 39,189 psi | 87% | 1719 fps | 98.9% |
| Accurate No. 9² | <<locked>> | 72% | 39,378 psi | 88% | 1722 fps | 95.6% |
| Accurate Solo 1000² | <<locked>> | 68% | 38,363 psi | 85% | 1404 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 39,871 psi | 89% | 1476 fps | 100% |
| Accurate TCM² | <<locked>> | 72% | 39,392 psi | 88% | 1716 fps | 96.5% |
| ADI AP 100 | <<locked>> | 84% | 39,102 psi | 87% | 1644 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 37,463 psi | 83% | 1296 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 40,205 psi | 89% | 1362 fps | 100% |
| ADI AS 30² | <<locked>> | 68% | 37,942 psi | 84% | 1365 fps | 100% |
| ADI AS 50N² | <<locked>> | 64% | 37,913 psi | 84% | 1411 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 38,392 psi | 85% | 1732 fps | 92.9% |
| Alliant BE-86² | <<locked>> | 68% | 37,608 psi | 84% | 1434 fps | 100% |
| Alliant BLUE DOT | <<locked>> | 84% | 39,450 psi | 88% | 1719 fps | 98.3% |
| Alliant Green Dot² | <<locked>> | 68% | 38,769 psi | 86% | 1424 fps | 100% |
| Alliant Herco | <<locked>> | 84% | 40,205 psi | 89% | 1558 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 68% | 38,392 psi | 85% | 1680 fps | 100% |
| Alliant Power Pro 300-MP* | <<locked>> | 88% | 40,219 psi | 89% | 1788 fps | 88.2% |
| Alliant RED DOT² | <<locked>> | 72% | 40,364 psi | 90% | 1414 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 37,463 psi | 83% | 1529 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 39,218 psi | 87% | 1414 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 84% | 38,696 psi | 86% | 1414 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 39,494 psi | 88% | 1430 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 40,611 psi | 90% | 1496 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 40,030 psi | 89% | 1355 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 92% | 40,176 psi | 89% | 1841 fps | 94.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 23,554 psi | 52% | 1142 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 38,740 psi | 86% | 1476 fps | 100% |
| Lovex D037.1² | <<locked>> | 64% | 39,189 psi | 87% | 1719 fps | 98.9% |
| Lovex D037.2² | <<locked>> | 72% | 40,451 psi | 90% | 1739 fps | 95.9% |
| Lovex S020² | <<locked>> | 64% | 39,798 psi | 89% | 1509 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 37,231 psi | 83% | 1440 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 38,276 psi | 85% | 1440 fps | 100% |
| Maxam CSB 3² | <<locked>> | 68% | 37,405 psi | 83% | 1417 fps | 100% |
| Maxam CSB 4² | <<locked>> | 68% | 39,059 psi | 87% | 1417 fps | 100% |
| Maxam CSB 5² | <<locked>> | 64% | 38,014 psi | 85% | 1355 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 37,971 psi | 84% | 1732 fps | 93.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 22,727 psi | 51% | 1165 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 72% | 40,640 psi | 90% | 1552 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 36,564 psi | 81% | 1663 fps | 99.3% |
| Rottweil P 806² | <<locked>> | 72% | 39,755 psi | 88% | 1673 fps | 100% |
| Shooters World Heavy Pistol² | <<locked>> | 72% | 40,451 psi | 90% | 1739 fps | 95.9% |
| Shooters World Major Pistol² | <<locked>> | 64% | 39,189 psi | 87% | 1719 fps | 98.9% |
| SNPE Vectan A0² | <<locked>> | 72% | 37,753 psi | 84% | 1490 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 40,640 psi | 90% | 1473 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 40,118 psi | 89% | 1490 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 64% | 37,666 psi | 84% | 1329 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 30,385 psi | 68% | 1591 fps | 92.7% |
| SNPE Vectan BA7 1/2² | <<locked>> | 76% | 38,319 psi | 85% | 1572 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 39,813 psi | 89% | 1486 fps | 100% |
| Somchem MP200² | <<locked>> | 64% | 38,290 psi | 85% | 1535 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 38,203 psi | 85% | 1506 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 68% | 37,579 psi | 84% | 1575 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 37,565 psi | 84% | 1660 fps | 99.7% |
| Vihtavuori N105 | <<locked>> | 84% | 39,537 psi | 88% | 1719 fps | 100% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 38,580 psi | 86% | 1759 fps | 93.7% |
| Vihtavuori N320² | <<locked>> | 64% | 39,189 psi | 87% | 1417 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 38,159 psi | 85% | 1322 fps | 100% |
| Vihtavuori N330² | <<locked>> | 64% | 39,813 psi | 89% | 1483 fps | 100% |
| Vihtavuori N340² | <<locked>> | 68% | 38,406 psi | 85% | 1509 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 36,651 psi | 82% | 1555 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 72% | 39,682 psi | 88% | 1490 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 4100*² | <<locked>> | 76% | 30,284 psi | 67% | 1578 fps | 85.7% |
| Accurate No. 2² | <<locked>> | 60% | 32,721 psi | 73% | 1440 fps | 100% |
| Accurate No. 7² | <<locked>> | 60% | 33,823 psi | 75% | 1631 fps | 97.6% |
| Accurate No. 9*² | <<locked>> | 60% | 25,860 psi | 58% | 1476 fps | 89% |
| Accurate Solo 1000² | <<locked>> | 60% | 31,575 psi | 70% | 1312 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 29,602 psi | 66% | 1339 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 26,136 psi | 58% | 1473 fps | 90.5% |
| ADI AP 100² | <<locked>> | 60% | 20,871 psi | 46% | 1306 fps | 98.1% |
| ADI APS 350² | <<locked>> | 60% | 31,705 psi | 71% | 1217 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 30,545 psi | 68% | 1230 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 31,662 psi | 70% | 1280 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 34,185 psi | 76% | 1358 fps | 100% |
| Alliant 2400*² | <<locked>> | 68% | 26,701 psi | 59% | 1509 fps | 86.6% |
| Alliant BE-86² | <<locked>> | 60% | 30,647 psi | 68% | 1339 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 20,392 psi | 45% | 1329 fps | 89.1% |
| Alliant Green Dot² | <<locked>> | 60% | 32,010 psi | 71% | 1332 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 22,756 psi | 51% | 1283 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 30,603 psi | 68% | 1552 fps | 99.9% |
| Alliant Power Pro 300-MP* | <<locked>> | 84% | 35,578 psi | 79% | 1709 fps | 86% |
| Alliant RED DOT² | <<locked>> | 60% | 30,777 psi | 68% | 1283 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 30,734 psi | 68% | 1427 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 31,778 psi | 71% | 1316 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 21,814 psi | 49% | 1168 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 35,041 psi | 78% | 1378 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 32,750 psi | 73% | 1391 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 26,252 psi | 58% | 1161 fps | 100% |
| Hodgdon LilGun* | <<locked>> | 80% | 26,905 psi | 60% | 1594 fps | 87.4% |
| Hodgdon TrailBoss² | 5 gr | 60% | 11,748 psi | 26% | 876 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 34,563 psi | 77% | 1417 fps | 100% |
| Lovex D037.1² | <<locked>> | 60% | 33,823 psi | 75% | 1631 fps | 97.6% |
| Lovex D037.2*² | <<locked>> | 60% | 26,614 psi | 59% | 1490 fps | 89.5% |
| Lovex S020² | <<locked>> | 60% | 35,302 psi | 79% | 1453 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 27,789 psi | 62% | 1302 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 31,212 psi | 69% | 1345 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 30,298 psi | 67% | 1319 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 32,213 psi | 72% | 1325 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 34,780 psi | 77% | 1312 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 68% | 25,730 psi | 57% | 1503 fps | 87.2% |
| ReloadSwiss RS 14² | 5.1 gr | 60% | 11,385 psi | 25% | 889 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 29,689 psi | 66% | 1404 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 60% | 28,311 psi | 63% | 1512 fps | 97.1% |
| Rottweil P 806² | <<locked>> | 60% | 26,977 psi | 60% | 1473 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 60% | 26,614 psi | 59% | 1490 fps | 89.5% |
| Shooters World Major Pistol² | <<locked>> | 60% | 33,823 psi | 75% | 1631 fps | 97.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 27,630 psi | 61% | 1342 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 32,866 psi | 73% | 1371 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 32,227 psi | 72% | 1385 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 34,055 psi | 76% | 1280 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 88% | 22,481 psi | 50% | 1417 fps | 87% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 24,860 psi | 55% | 1358 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 32,256 psi | 72% | 1385 fps | 100% |
| Somchem MP200² | <<locked>> | 60% | 34,330 psi | 76% | 1480 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 30,893 psi | 69% | 1404 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 29,370 psi | 65% | 1453 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 21,147 psi | 47% | 1339 fps | 94.1% |
| Vihtavuori N105² | <<locked>> | 60% | 18,579 psi | 41% | 1322 fps | 95.9% |
| Vihtavuori N110* | <<locked>> | 84% | 24,178 psi | 54% | 1483 fps | 85.4% |
| Vihtavuori N320² | <<locked>> | 60% | 35,201 psi | 78% | 1368 fps | 100% |
| Vihtavuori N32C Tin Star² | 6.8 gr | 60% | 19,029 psi | 42% | 1033 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 35,302 psi | 79% | 1427 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 30,850 psi | 69% | 1404 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 25,628 psi | 57% | 1381 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 29,501 psi | 66% | 1352 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 11 powders for .357 Maximum loaded with the .356 | 145gr | LOS RN. Hodgdon LilGun delivers the highest muzzle velocity at 1,841 fps; across all powders the maximum-charge window runs from 1,142 fps to 1,841 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 11 of the 11 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (310 MPa), the top charges use 51–89 %, leaving at least 11 % 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 N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Maximum with the .356 | 145gr | LOS RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon LilGun, SNPE Vectan BA6 1/2, Vihtavuori N110 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.