Load Specifications
Load data in caliber .357 Auto Mag. with .358 | 150gr | LEE Mold 358-150-1R bullet and 43 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: 6.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 9*² | <<locked>> | 68% | 29,805 psi | 81% | 1519 fps | 90.1% |
| Accurate Solo 1000² | <<locked>> | 64% | 32,938 psi | 89% | 1302 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 64% | 30,037 psi | 81% | 1319 fps | 100% |
| Accurate TCM*² | <<locked>> | 68% | 29,849 psi | 81% | 1512 fps | 91.4% |
| ADI AP 100 | <<locked>> | 80% | 32,358 psi | 87% | 1506 fps | 100% |
| ADI APS 350² | <<locked>> | 64% | 33,112 psi | 90% | 1207 fps | 100% |
| ADI APS 450² | <<locked>> | 64% | 32,329 psi | 87% | 1227 fps | 100% |
| ADI AS 30² | <<locked>> | 64% | 31,937 psi | 86% | 1260 fps | 100% |
| Alliant 2400* | <<locked>> | 80% | 33,040 psi | 89% | 1598 fps | 89% |
| Alliant BE-86² | <<locked>> | 64% | 30,647 psi | 83% | 1316 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 31,343 psi | 85% | 1542 fps | 94.8% |
| Alliant Green Dot² | <<locked>> | 64% | 32,576 psi | 88% | 1316 fps | 100% |
| Alliant Herco | <<locked>> | 80% | 33,373 psi | 90% | 1440 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 64% | 30,748 psi | 83% | 1516 fps | 99.7% |
| Alliant RED DOT² | <<locked>> | 64% | 30,850 psi | 83% | 1263 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 64% | 30,356 psi | 82% | 1398 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 64% | 32,561 psi | 88% | 1302 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 80% | 32,300 psi | 87% | 1309 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 20,798 psi | 56% | 1086 fps | 100% |
| Lovex D037.2*² | <<locked>> | 68% | 30,690 psi | 83% | 1535 fps | 90.6% |
| Maxam CSB 1² | <<locked>> | 68% | 31,357 psi | 85% | 1335 fps | 100% |
| Maxam CSB 2² | <<locked>> | 64% | 30,618 psi | 83% | 1319 fps | 100% |
| Maxam CSB 3² | <<locked>> | 64% | 30,995 psi | 84% | 1302 fps | 100% |
| Maxam CSB 4² | <<locked>> | 64% | 33,272 psi | 90% | 1316 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 80% | 32,314 psi | 87% | 1594 fps | 89.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,942 psi | 51% | 1093 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 64% | 29,573 psi | 80% | 1375 fps | 100% |
| ReloadSwiss RS 24² | <<locked>> | 68% | 32,547 psi | 88% | 1555 fps | 97.8% |
| Rottweil P 806² | <<locked>> | 72% | 33,446 psi | 90% | 1558 fps | 100% |
| Shooters World Heavy Pistol*² | <<locked>> | 68% | 30,690 psi | 83% | 1535 fps | 90.6% |
| SNPE Vectan A0² | <<locked>> | 68% | 31,705 psi | 86% | 1378 fps | 100% |
| SNPE Vectan BA6 1/2*ᴾ | <<locked>> | 100% | 25,817 psi | 70% | 1460 fps | 88.1% |
| SNPE Vectan BA7 1/2² | <<locked>> | 72% | 31,198 psi | 84% | 1437 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 64% | 32,648 psi | 88% | 1365 fps | 100% |
| Somchem MS200² | <<locked>> | 64% | 31,111 psi | 84% | 1378 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 64% | 29,327 psi | 79% | 1424 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 80% | 33,170 psi | 90% | 1552 fps | 98.5% |
| Vihtavuori N105 | <<locked>> | 80% | 29,863 psi | 81% | 1535 fps | 99.6% |
| Vihtavuori N110*ᴾ | <<locked>> | 100% | 32,866 psi | 89% | 1617 fps | 89.6% |
| Vihtavuori N32C Tin Star | <<locked>> | 92% | 32,692 psi | 88% | 1237 fps | 100% |
| Vihtavuori N340² | <<locked>> | 64% | 31,546 psi | 85% | 1388 fps | 100% |
| Vihtavuori N350² | <<locked>> | 72% | 32,735 psi | 89% | 1470 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 32,706 psi | 88% | 1375 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 9*² | <<locked>> | 64% | 25,701 psi | 69% | 1437 fps | 87.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 29,863 psi | 81% | 1260 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 26,600 psi | 72% | 1266 fps | 100% |
| Accurate TCM*² | <<locked>> | 60% | 22,017 psi | 60% | 1348 fps | 85.7% |
| ADI AP 100² | <<locked>> | 60% | 17,825 psi | 48% | 1204 fps | 95.2% |
| ADI APS 350² | <<locked>> | 60% | 30,545 psi | 83% | 1171 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 29,356 psi | 79% | 1184 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 28,819 psi | 78% | 1217 fps | 100% |
| Alliant 2400*² | <<locked>> | 76% | 29,022 psi | 78% | 1522 fps | 86.6% |
| Alliant BE-86² | <<locked>> | 60% | 27,543 psi | 74% | 1270 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 64% | 18,971 psi | 51% | 1263 fps | 86% |
| Alliant Green Dot² | <<locked>> | 60% | 28,950 psi | 78% | 1263 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 19,276 psi | 52% | 1194 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 26,789 psi | 72% | 1440 fps | 98.9% |
| Alliant RED DOT² | <<locked>> | 60% | 27,746 psi | 75% | 1217 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 27,093 psi | 73% | 1348 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 28,921 psi | 78% | 1253 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 18,652 psi | 50% | 1096 fps | 100% |
| Hodgdon TrailBoss² | 4.9 gr | 60% | 8,920 psi | 24% | 804 fps | 100% |
| Lovex D037.2*² | <<locked>> | 64% | 26,078 psi | 71% | 1444 fps | 87.6% |
| Maxam CSB 1² | <<locked>> | 60% | 24,816 psi | 67% | 1234 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 27,717 psi | 75% | 1276 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 28,079 psi | 76% | 1263 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 29,573 psi | 80% | 1263 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 76% | 27,876 psi | 75% | 1509 fps | 87% |
| ReloadSwiss RS 14² | 5 gr | 60% | 8,209 psi | 22% | 807 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 26,339 psi | 71% | 1325 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 24,816 psi | 67% | 1404 fps | 94.4% |
| Rottweil P 806² | <<locked>> | 60% | 21,393 psi | 58% | 1342 fps | 99.7% |
| Shooters World Heavy Pistol*² | <<locked>> | 64% | 26,078 psi | 71% | 1444 fps | 87.6% |
| SNPE Vectan A0² | <<locked>> | 60% | 24,961 psi | 67% | 1273 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 96% | 23,061 psi | 62% | 1398 fps | 85.7% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 21,843 psi | 59% | 1270 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 29,225 psi | 79% | 1316 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 27,833 psi | 75% | 1329 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 25,933 psi | 70% | 1365 fps | 100% |
| Vihtavuori 3N38*² | <<locked>> | 60% | 17,143 psi | 46% | 1211 fps | 89.1% |
| Vihtavuori N105*² | <<locked>> | 60% | 14,417 psi | 39% | 1175 fps | 89.9% |
| Vihtavuori N110* | <<locked>> | 96% | 28,587 psi | 77% | 1542 fps | 87% |
| Vihtavuori N32C Tin Star² | 6.6 gr | 60% | 15,635 psi | 42% | 965 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 27,601 psi | 75% | 1329 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 22,263 psi | 60% | 1293 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 26,194 psi | 71% | 1280 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 43 powders for .357 Auto Mag. loaded with the .358 | 150gr | LEE Mold 358-150-1R. Vihtavuori N110 delivers the highest muzzle velocity at 1,617 fps; across all powders the maximum-charge window runs from 1,086 fps to 1,617 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 13 of the 43 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (255 MPa), the top charges use 51–90 %, 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 N32C Tin Star, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for .357 Auto Mag. with the .358 | 150gr | LEE Mold 358-150-1R 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. Baschieri & Pellagri 102 Pistol, 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.