Load Specifications
Load data in caliber .357 Mag. with .357 | 148gr | LOS WC bullet and 65 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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 38,087 psi | 88% | 1325 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 36,405 psi | 84% | 1460 fps | 93.8% |
| Accurate No. 9* | <<locked>> | 80% | 36,114 psi | 83% | 1447 fps | 88.1% |
| Accurate Solo 1000² | <<locked>> | 72% | 36,085 psi | 83% | 1204 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 36,129 psi | 83% | 1263 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 36,622 psi | 84% | 1450 fps | 89.7% |
| ADI AP 100 | <<locked>> | 92% | 36,100 psi | 83% | 1401 fps | 99.5% |
| ADI AP 70N² | <<locked>> | 64% | 37,521 psi | 86% | 1286 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 36,956 psi | 85% | 1115 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 35,694 psi | 82% | 1135 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 39,015 psi | 90% | 1204 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 38,754 psi | 89% | 1247 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 38,087 psi | 88% | 1270 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 39,160 psi | 90% | 1490 fps | 93.8% |
| Alliant BULLSEYE² | <<locked>> | 68% | 36,753 psi | 84% | 1342 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 39,146 psi | 90% | 1253 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 38,232 psi | 88% | 1355 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 36,709 psi | 84% | 1450 fps | 99.3% |
| Alliant RED DOT² | <<locked>> | 76% | 38,000 psi | 87% | 1214 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 37,724 psi | 87% | 1355 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 36,956 psi | 85% | 1345 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 35,708 psi | 82% | 1204 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 37,623 psi | 86% | 1237 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 35,824 psi | 82% | 1227 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 72% | 36,158 psi | 83% | 1270 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,811 psi | 87% | 1155 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 38,218 psi | 88% | 1401 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,740 psi | 45% | 948 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 38,377 psi | 88% | 1296 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 36,405 psi | 84% | 1460 fps | 93.8% |
| Lovex D037.2* | <<locked>> | 80% | 37,521 psi | 86% | 1467 fps | 88.7% |
| Lovex S011² | <<locked>> | 64% | 38,000 psi | 87% | 1257 fps | 100% |
| Lovex S020² | <<locked>> | 68% | 35,578 psi | 82% | 1286 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 36,738 psi | 84% | 1263 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 37,362 psi | 86% | 1266 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 37,159 psi | 85% | 1247 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 36,013 psi | 83% | 1211 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 35,940 psi | 83% | 1161 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 37,884 psi | 87% | 1358 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 36,187 psi | 83% | 1234 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,608 psi | 43% | 961 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 38,798 psi | 89% | 1358 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 38,653 psi | 89% | 1480 fps | 96.5% |
| Rottweil P 806 | <<locked>> | 80% | 34,983 psi | 80% | 1437 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 37,521 psi | 86% | 1467 fps | 88.7% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 36,405 psi | 84% | 1460 fps | 93.8% |
| SNPE Vectan A0 | <<locked>> | 80% | 37,420 psi | 86% | 1309 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 36,970 psi | 85% | 1257 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 36,042 psi | 83% | 1266 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 36,579 psi | 84% | 1145 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 36,289 psi | 83% | 1362 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 36,129 psi | 83% | 1270 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 38,363 psi | 88% | 1473 fps | 99.9% |
| Somchem MP200² | <<locked>> | 72% | 38,101 psi | 88% | 1352 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 37,855 psi | 87% | 1325 fps | 100% |
| Somchem S221² | <<locked>> | 64% | 35,172 psi | 81% | 1401 fps | 97.6% |
| Vihtavuori 3N37² | <<locked>> | 76% | 36,013 psi | 83% | 1375 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 88% | 36,085 psi | 83% | 1430 fps | 96.4% |
| Vihtavuori N105 | <<locked>> | 96% | 36,767 psi | 85% | 1490 fps | 99.2% |
| Vihtavuori N320² | <<locked>> | 72% | 39,001 psi | 90% | 1247 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 37,521 psi | 86% | 1155 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 38,014 psi | 87% | 1293 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 37,449 psi | 86% | 1322 fps | 100% |
| Vihtavuori N350 | <<locked>> | 80% | 36,550 psi | 84% | 1375 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 76% | 35,578 psi | 82% | 1270 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% | 26,542 psi | 61% | 1178 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 24,033 psi | 55% | 1250 fps | 86.9% |
| Accurate No. 9*² | <<locked>> | 76% | 31,647 psi | 73% | 1378 fps | 85.7% |
| Accurate Solo 1000² | <<locked>> | 60% | 26,803 psi | 62% | 1089 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,525 psi | 54% | 1093 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 32,111 psi | 74% | 1381 fps | 87.5% |
| ADI AP 100*² | 6.7 gr | 60% | 16,157 psi | 37% | 1020 fps | 89.6% |
| ADI AP 70N² | <<locked>> | 60% | 34,113 psi | 78% | 1247 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 28,674 psi | 66% | 1017 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,238 psi | 63% | 1030 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 26,731 psi | 61% | 1053 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 29,182 psi | 67% | 1129 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 25,019 psi | 57% | 1106 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 23,801 psi | 55% | 1230 fps | 85.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 30,052 psi | 69% | 1250 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 27,267 psi | 63% | 1106 fps | 100% |
| Alliant Herco² | 6.1 gr | 60% | 18,115 psi | 42% | 1037 fps | 100% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 23,598 psi | 54% | 1224 fps | 94.8% |
| Alliant RED DOT² | <<locked>> | 60% | 26,542 psi | 61% | 1066 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 33,504 psi | 77% | 1302 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 24,395 psi | 56% | 1161 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 25,933 psi | 60% | 1079 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,535 psi | 40% | 958 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 28,631 psi | 66% | 1142 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 26,701 psi | 61% | 1148 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,235 psi | 53% | 971 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 33,866 psi | 78% | 1345 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,921 psi | 23% | 719 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 28,660 psi | 66% | 1175 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 24,033 psi | 55% | 1250 fps | 86.9% |
| Lovex D037.2*² | <<locked>> | 76% | 32,822 psi | 75% | 1398 fps | 86.4% |
| Lovex S011² | <<locked>> | 60% | 33,388 psi | 77% | 1204 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 28,210 psi | 65% | 1191 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 22,640 psi | 52% | 1070 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 25,469 psi | 59% | 1112 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 25,106 psi | 58% | 1089 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 26,818 psi | 62% | 1096 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,660 psi | 68% | 1086 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 33,243 psi | 76% | 1302 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 31,923 psi | 73% | 1184 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,674 psi | 22% | 732 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 23,003 psi | 53% | 1142 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 21,277 psi | 49% | 1175 fps | 87.3% |
| Rottweil P 806² | <<locked>> | 60% | 18,869 psi | 43% | 1155 fps | 96.8% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 32,822 psi | 75% | 1398 fps | 86.4% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 24,033 psi | 55% | 1250 fps | 86.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 22,539 psi | 52% | 1099 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 27,325 psi | 63% | 1135 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 26,513 psi | 61% | 1142 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 30,501 psi | 70% | 1073 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 19,638 psi | 45% | 1083 fps | 97.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 26,223 psi | 60% | 1138 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 26,411 psi | 61% | 1286 fps | 97.7% |
| Somchem MP200² | <<locked>> | 60% | 27,557 psi | 63% | 1211 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 25,077 psi | 58% | 1152 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 30,748 psi | 71% | 1332 fps | 96.1% |
| Vihtavuori 3N37² | <<locked>> | 60% | 22,249 psi | 51% | 1158 fps | 99.2% |
| Vihtavuori 3N38*² | <<locked>> | 64% | 18,420 psi | 42% | 1102 fps | 85.7% |
| Vihtavuori N105*² | 8.2 gr | 64% | 14,837 psi | 34% | 1053 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 28,137 psi | 65% | 1119 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 17,927 psi | 41% | 896 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 27,050 psi | 62% | 1158 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 24,366 psi | 56% | 1145 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 20,537 psi | 47% | 1122 fps | 98.8% |
| Winchester AutoComp ² | <<locked>> | 60% | 23,699 psi | 54% | 1109 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 65 powders for .357 Mag. loaded with the .357 | 148gr | LOS WC. Alliant BLUE DOT delivers the highest muzzle velocity at 1,490 fps; across all powders the maximum-charge window runs from 948 fps to 1,490 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 21 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 43–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14 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 Mag. with the .357 | 148gr | LOS WC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Accurate No. 9, Accurate TCM burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, ADI AP 100 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.