Load Specifications
Load data in caliber .357 Mag. with .357 | 158gr | Fiocchi SJSP bullet and 64 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 SNPE Vectan BA7 1/2.
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% | 37,333 psi | 86% | 1247 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 35,578 psi | 82% | 1378 fps | 93.7% |
| Accurate No. 9* | <<locked>> | 80% | 35,201 psi | 81% | 1365 fps | 88% |
| Accurate Solo 1000² | <<locked>> | 72% | 35,433 psi | 81% | 1132 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 39,131 psi | 90% | 1224 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 35,607 psi | 82% | 1365 fps | 89.5% |
| ADI AP 100 | <<locked>> | 96% | 38,740 psi | 89% | 1362 fps | 99.8% |
| ADI AP 70N² | <<locked>> | 64% | 37,434 psi | 86% | 1217 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 36,637 psi | 84% | 1050 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 38,769 psi | 89% | 1102 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 38,247 psi | 88% | 1132 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 38,232 psi | 88% | 1175 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 37,130 psi | 85% | 1194 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 38,464 psi | 88% | 1407 fps | 93.8% |
| Alliant BULLSEYE² | <<locked>> | 68% | 36,666 psi | 84% | 1270 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 38,754 psi | 89% | 1181 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 37,855 psi | 87% | 1283 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 35,621 psi | 82% | 1365 fps | 99.2% |
| Alliant RED DOT² | <<locked>> | 76% | 37,014 psi | 85% | 1135 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 36,956 psi | 85% | 1276 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 36,361 psi | 84% | 1266 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 38,392 psi | 88% | 1165 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 36,869 psi | 85% | 1165 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 35,650 psi | 82% | 1158 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 38,247 psi | 88% | 1096 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 37,565 psi | 86% | 1322 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 19,392 psi | 45% | 892 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 38,464 psi | 88% | 1227 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 35,578 psi | 82% | 1378 fps | 93.7% |
| Lovex D037.2* | <<locked>> | 80% | 35,984 psi | 83% | 1375 fps | 88.3% |
| Lovex S011² | <<locked>> | 64% | 36,695 psi | 84% | 1175 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 38,769 psi | 89% | 1250 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 35,998 psi | 83% | 1188 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 37,376 psi | 86% | 1198 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 36,912 psi | 85% | 1175 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 35,346 psi | 81% | 1138 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 39,001 psi | 90% | 1129 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 37,188 psi | 85% | 1283 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 35,810 psi | 82% | 1165 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 18,304 psi | 42% | 902 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 38,696 psi | 89% | 1286 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 37,188 psi | 85% | 1385 fps | 96.3% |
| Rottweil P 806 | <<locked>> | 84% | 38,696 psi | 89% | 1411 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 35,984 psi | 83% | 1375 fps | 88.3% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 35,578 psi | 82% | 1378 fps | 93.7% |
| SNPE Vectan A0 | <<locked>> | 80% | 36,289 psi | 83% | 1227 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 36,622 psi | 84% | 1184 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 39,291 psi | 90% | 1230 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 35,737 psi | 82% | 1073 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 35,505 psi | 82% | 1280 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 39,030 psi | 90% | 1230 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 37,434 psi | 86% | 1388 fps | 99.9% |
| Somchem MP200² | <<locked>> | 72% | 38,029 psi | 87% | 1280 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 37,420 psi | 86% | 1250 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 38,783 psi | 89% | 1378 fps | 98.6% |
| Vihtavuori 3N37 | <<locked>> | 80% | 39,204 psi | 90% | 1339 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 36,361 psi | 84% | 1362 fps | 96.7% |
| Vihtavuori N105 | <<locked>> | 96% | 35,447 psi | 81% | 1401 fps | 99.1% |
| Vihtavuori N320² | <<locked>> | 72% | 39,102 psi | 90% | 1178 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 34,461 psi | 79% | 1063 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 38,638 psi | 89% | 1230 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 37,347 psi | 86% | 1250 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 37,159 psi | 85% | 1309 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 39,015 psi | 90% | 1240 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% | 25,846 psi | 59% | 1102 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 23,554 psi | 54% | 1178 fps | 86.9% |
| Accurate No. 9*² | <<locked>> | 76% | 31,096 psi | 71% | 1302 fps | 85.7% |
| Accurate Solo 1000² | <<locked>> | 60% | 26,324 psi | 61% | 1020 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 23,235 psi | 53% | 1030 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 30,792 psi | 71% | 1296 fps | 87.1% |
| ADI AP 100*² | 6.1 gr | 60% | 15,824 psi | 36% | 958 fps | 89.7% |
| ADI AP 70N² | <<locked>> | 60% | 32,880 psi | 76% | 1165 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 28,572 psi | 66% | 958 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 26,571 psi | 61% | 965 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 26,760 psi | 62% | 997 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 28,819 psi | 66% | 1063 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 24,584 psi | 56% | 1040 fps | 100% |
| Alliant BLUE DOT*² | <<locked>> | 76% | 23,221 psi | 53% | 1158 fps | 85.3% |
| Alliant BULLSEYE² | <<locked>> | 60% | 29,327 psi | 67% | 1175 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 26,789 psi | 62% | 1040 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 18,014 psi | 41% | 981 fps | 100% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 23,047 psi | 53% | 1155 fps | 94.7% |
| Alliant RED DOT² | <<locked>> | 60% | 25,672 psi | 59% | 997 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 33,228 psi | 76% | 1230 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 23,685 psi | 54% | 1093 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 25,657 psi | 59% | 1017 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 17,289 psi | 40% | 902 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 27,847 psi | 64% | 1070 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 23,148 psi | 53% | 915 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 32,808 psi | 75% | 1263 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 9,776 psi | 22% | 676 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 27,891 psi | 64% | 1102 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 23,554 psi | 54% | 1178 fps | 86.9% |
| Lovex D037.2*² | <<locked>> | 76% | 31,691 psi | 73% | 1312 fps | 86.1% |
| Lovex S011² | <<locked>> | 60% | 32,793 psi | 75% | 1132 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 27,688 psi | 64% | 1122 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 22,365 psi | 51% | 1010 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 24,526 psi | 56% | 1040 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 24,714 psi | 57% | 1024 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 26,353 psi | 61% | 1030 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 29,022 psi | 67% | 1020 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 32,242 psi | 74% | 1224 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 32,068 psi | 74% | 1122 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 9,558 psi | 22% | 689 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 22,423 psi | 52% | 1076 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 20,726 psi | 48% | 1106 fps | 87.2% |
| Rottweil P 806² | <<locked>> | 60% | 18,130 psi | 42% | 1083 fps | 96.7% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 31,691 psi | 73% | 1312 fps | 86.1% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 23,554 psi | 54% | 1178 fps | 86.9% |
| SNPE Vectan A0² | <<locked>> | 60% | 21,915 psi | 50% | 1030 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 26,934 psi | 62% | 1070 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 26,107 psi | 60% | 1076 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 30,081 psi | 69% | 1007 fps | 100% |
| SNPE Vectan BA7 1/2² | 6.5 gr | 60% | 19,014 psi | 44% | 1014 fps | 97.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 26,223 psi | 60% | 1076 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 25,570 psi | 59% | 1211 fps | 97.6% |
| Somchem MP200² | <<locked>> | 60% | 27,412 psi | 63% | 1145 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 24,482 psi | 56% | 1079 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 30,066 psi | 69% | 1257 fps | 96.1% |
| Vihtavuori 3N37² | <<locked>> | 60% | 22,307 psi | 51% | 1099 fps | 99.3% |
| Vihtavuori 3N38*² | <<locked>> | 68% | 19,131 psi | 44% | 1066 fps | 86.8% |
| Vihtavuori N105*² | 7.4 gr | 64% | 14,228 psi | 33% | 984 fps | 85.2% |
| Vihtavuori N320² | <<locked>> | 60% | 28,253 psi | 65% | 1060 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,708 psi | 36% | 807 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 27,528 psi | 63% | 1102 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 24,091 psi | 55% | 1079 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 19,392 psi | 45% | 1040 fps | 98.5% |
| Winchester AutoComp ² | <<locked>> | 60% | 23,438 psi | 54% | 1043 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 64 powders for .357 Mag. loaded with the .357 | 158gr | Fiocchi SJSP. Rottweil P 806 delivers the highest muzzle velocity at 1,411 fps; across all powders the maximum-charge window runs from 892 fps to 1,411 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 24 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 42–90 %, 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, ADI AP 100, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .357 | 158gr | Fiocchi SJSP 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.