Load Specifications
Load data in caliber .357 Mag. with .357 | 158gr | LOS FP 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, Vihtavuori 3N38 and ADI AP 100.
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% | 37,710 psi | 87% | 1257 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 36,390 psi | 84% | 1394 fps | 94.2% |
| Accurate No. 9* | <<locked>> | 80% | 35,882 psi | 82% | 1375 fps | 88.4% |
| Accurate Solo 1000² | <<locked>> | 76% | 38,812 psi | 89% | 1171 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 35,476 psi | 82% | 1191 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 35,549 psi | 82% | 1368 fps | 89.7% |
| ADI AP 100 | <<locked>> | 92% | 35,563 psi | 82% | 1325 fps | 99.5% |
| ADI AP 70N² | <<locked>> | 64% | 36,883 psi | 85% | 1214 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 37,101 psi | 85% | 1060 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 39,189 psi | 90% | 1112 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 38,667 psi | 89% | 1138 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 38,696 psi | 89% | 1181 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 37,333 psi | 86% | 1198 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 38,435 psi | 88% | 1411 fps | 93.9% |
| Alliant BULLSEYE² | <<locked>> | 68% | 36,985 psi | 85% | 1276 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 39,146 psi | 90% | 1191 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 37,985 psi | 87% | 1286 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 36,622 psi | 84% | 1381 fps | 99.4% |
| Alliant RED DOT² | <<locked>> | 76% | 37,492 psi | 86% | 1145 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 37,275 psi | 86% | 1283 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 36,651 psi | 84% | 1273 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 38,798 psi | 89% | 1171 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 37,072 psi | 85% | 1168 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 35,781 psi | 82% | 1165 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,623 psi | 86% | 1093 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 37,666 psi | 87% | 1325 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,740 psi | 45% | 899 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 38,769 psi | 89% | 1237 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 36,390 psi | 84% | 1394 fps | 94.2% |
| Lovex D037.2* | <<locked>> | 80% | 36,579 psi | 84% | 1388 fps | 88.7% |
| Lovex S011² | <<locked>> | 64% | 37,101 psi | 85% | 1181 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 39,117 psi | 90% | 1257 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 36,303 psi | 83% | 1194 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 37,710 psi | 87% | 1204 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 37,347 psi | 86% | 1181 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 35,810 psi | 82% | 1148 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 36,318 psi | 83% | 1106 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 37,478 psi | 86% | 1286 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 39,102 psi | 90% | 1201 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,637 psi | 43% | 912 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 38,957 psi | 90% | 1293 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 38,101 psi | 88% | 1401 fps | 96.6% |
| Rottweil P 801² | <<locked>> | 64% | 38,870 psi | 89% | 1171 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 38,740 psi | 89% | 1414 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 36,579 psi | 84% | 1388 fps | 88.7% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 36,390 psi | 84% | 1394 fps | 94.2% |
| SNPE Vectan A0 | <<locked>> | 80% | 36,564 psi | 84% | 1234 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 36,883 psi | 85% | 1191 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 35,955 psi | 83% | 1201 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 36,143 psi | 83% | 1079 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 36,419 psi | 84% | 1293 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 39,349 psi | 90% | 1237 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 37,710 psi | 87% | 1394 fps | 100% |
| Somchem MP200² | <<locked>> | 72% | 38,276 psi | 88% | 1286 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 37,724 psi | 87% | 1257 fps | 100% |
| Somchem S221² | <<locked>> | 64% | 34,301 psi | 79% | 1322 fps | 97.6% |
| Vihtavuori 3N37 | <<locked>> | 80% | 39,320 psi | 90% | 1342 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 37,289 psi | 86% | 1378 fps | 97% |
| Vihtavuori N105 | <<locked>> | 96% | 36,347 psi | 84% | 1414 fps | 99.3% |
| Vihtavuori N320² | <<locked>> | 68% | 35,389 psi | 81% | 1142 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 34,766 psi | 80% | 1066 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 39,030 psi | 90% | 1237 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 37,637 psi | 87% | 1257 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 38,261 psi | 88% | 1325 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 39,131 psi | 90% | 1247 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% | 26,295 psi | 60% | 1112 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 23,699 psi | 54% | 1184 fps | 87.2% |
| Accurate No. 9*² | <<locked>> | 76% | 31,067 psi | 71% | 1306 fps | 85.9% |
| Accurate Solo 1000² | <<locked>> | 60% | 26,745 psi | 61% | 1030 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,670 psi | 54% | 1037 fps | 100% |
| Accurate TCM*² | <<locked>> | 72% | 27,760 psi | 64% | 1247 fps | 85.3% |
| ADI AP 100*² | 6.2 gr | 60% | 16,041 psi | 37% | 968 fps | 90% |
| ADI AP 70N² | <<locked>> | 60% | 33,228 psi | 76% | 1175 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 28,137 psi | 65% | 955 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 27,064 psi | 62% | 974 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 27,267 psi | 63% | 1007 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 29,269 psi | 67% | 1073 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 24,265 psi | 56% | 1040 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 23,380 psi | 54% | 1165 fps | 85.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 29,776 psi | 68% | 1184 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 26,411 psi | 61% | 1037 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 18,289 psi | 42% | 991 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 60% | 23,293 psi | 54% | 1161 fps | 95% |
| Alliant RED DOT² | <<locked>> | 60% | 26,165 psi | 60% | 1007 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 33,634 psi | 77% | 1240 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 24,076 psi | 55% | 1099 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 26,107 psi | 60% | 1027 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,593 psi | 40% | 909 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 28,036 psi | 64% | 1076 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,829 psi | 52% | 912 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 33,011 psi | 76% | 1270 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,689 psi | 22% | 676 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 28,239 psi | 65% | 1109 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 23,699 psi | 54% | 1184 fps | 87.2% |
| Lovex D037.2*² | <<locked>> | 76% | 31,720 psi | 73% | 1316 fps | 86.3% |
| Lovex S011² | <<locked>> | 60% | 33,228 psi | 76% | 1138 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 28,021 psi | 64% | 1129 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 22,075 psi | 51% | 1007 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 24,903 psi | 57% | 1050 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 25,150 psi | 58% | 1033 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 26,803 psi | 62% | 1037 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,530 psi | 68% | 1027 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 32,489 psi | 75% | 1230 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 31,633 psi | 73% | 1119 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,485 psi | 22% | 689 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 22,118 psi | 51% | 1073 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 20,871 psi | 48% | 1112 fps | 87.5% |
| Rottweil P 801² | <<locked>> | 60% | 35,099 psi | 81% | 1132 fps | 100% |
| Rottweil P 806² | <<locked>> | 60% | 18,289 psi | 42% | 1089 fps | 96.9% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 31,720 psi | 73% | 1316 fps | 86.3% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 23,699 psi | 54% | 1184 fps | 87.2% |
| SNPE Vectan A0² | <<locked>> | 60% | 22,234 psi | 51% | 1040 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 27,238 psi | 63% | 1076 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 26,455 psi | 61% | 1083 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,631 psi | 68% | 1007 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 19,203 psi | 44% | 1020 fps | 97.5% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 25,846 psi | 59% | 1073 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 25,817 psi | 59% | 1217 fps | 97.8% |
| Somchem MP200² | <<locked>> | 60% | 26,992 psi | 62% | 1142 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 24,758 psi | 57% | 1086 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 30,182 psi | 69% | 1260 fps | 96.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 22,510 psi | 52% | 1106 fps | 99.4% |
| Vihtavuori 3N38*² | 8.1 gr | 68% | 19,363 psi | 45% | 1073 fps | 87.2% |
| Vihtavuori N105*² | 7.5 gr | 64% | 14,402 psi | 33% | 991 fps | 85.6% |
| Vihtavuori N320² | <<locked>> | 60% | 28,689 psi | 66% | 1066 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,548 psi | 36% | 804 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 27,920 psi | 64% | 1109 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 24,410 psi | 56% | 1086 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 19,638 psi | 45% | 1047 fps | 98.7% |
| Winchester AutoComp ² | <<locked>> | 60% | 23,670 psi | 54% | 1053 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 | 158gr | LOS FP. Rottweil P 806 delivers the highest muzzle velocity at 1,414 fps; across all powders the maximum-charge window runs from 899 fps to 1,414 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 23 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, Vihtavuori N32C Tin Star 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, Vihtavuori 3N38, ADI AP 100 rank at the top here: for .357 Mag. with the .357 | 158gr | LOS FP 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 No. 2, Accurate Solo 1000, Accurate Solo 1250 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.