Load Specifications
Load data in caliber .357 Mag. with .357 | 160gr | Speer JSP SWC bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori 3N38, Vihtavuori N105 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% | 36,680 psi | 84% | 1243 fps | 100% |
| Accurate No. 7*² | <<locked>> | 72% | 33,779 psi | 78% | 1358 fps | 93.4% |
| Accurate No. 9* | <<locked>> | 84% | 38,899 psi | 89% | 1417 fps | 90% |
| Accurate Solo 1000² | <<locked>> | 76% | 38,014 psi | 87% | 1161 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 38,348 psi | 88% | 1220 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 38,609 psi | 89% | 1411 fps | 91.2% |
| ADI AP 100 | <<locked>> | 96% | 37,652 psi | 87% | 1352 fps | 99.8% |
| ADI AP 70N² | <<locked>> | 64% | 35,244 psi | 81% | 1201 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,711 psi | 89% | 1073 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,594 psi | 86% | 1093 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 37,536 psi | 86% | 1129 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 37,391 psi | 86% | 1168 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 36,013 psi | 83% | 1184 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 36,767 psi | 85% | 1388 fps | 93.5% |
| Alliant BULLSEYE² | <<locked>> | 68% | 36,027 psi | 83% | 1263 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 37,884 psi | 87% | 1178 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,928 psi | 89% | 1299 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,696 psi | 89% | 1411 fps | 99.7% |
| Alliant RED DOT² | <<locked>> | 76% | 36,245 psi | 83% | 1132 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 36,303 psi | 83% | 1270 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 37,869 psi | 87% | 1289 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 37,637 psi | 87% | 1161 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,421 psi | 88% | 1181 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 38,435 psi | 88% | 1191 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,014 psi | 85% | 1083 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 36,376 psi | 84% | 1312 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 18,144 psi | 42% | 883 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 36,172 psi | 83% | 1211 fps | 100% |
| Lovex D037.1*² | <<locked>> | 72% | 33,779 psi | 78% | 1358 fps | 93.4% |
| Lovex D037.2* | <<locked>> | 80% | 34,925 psi | 80% | 1365 fps | 88.3% |
| Lovex S011² | <<locked>> | 64% | 36,260 psi | 83% | 1171 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 37,637 psi | 87% | 1243 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 38,957 psi | 90% | 1220 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 38,914 psi | 89% | 1220 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 39,247 psi | 90% | 1201 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,797 psi | 87% | 1168 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 38,566 psi | 89% | 1129 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 96% | 38,754 psi | 89% | 1450 fps | 88.4% |
| Ramshot Silhouette² | <<locked>> | 64% | 35,360 psi | 81% | 1263 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 37,159 psi | 85% | 1188 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,215 psi | 37% | 883 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,738 psi | 84% | 1266 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 36,651 psi | 84% | 1385 fps | 96.4% |
| Rottweil P 801² | <<locked>> | 64% | 37,115 psi | 85% | 1155 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 36,027 psi | 83% | 1388 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 34,925 psi | 80% | 1365 fps | 88.3% |
| Shooters World Major Pistol*² | <<locked>> | 72% | 33,779 psi | 78% | 1358 fps | 93.4% |
| SNPE Vectan A0 | <<locked>> | 84% | 39,204 psi | 90% | 1260 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 35,911 psi | 83% | 1181 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 38,624 psi | 89% | 1227 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,595 psi | 89% | 1102 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 38,508 psi | 89% | 1316 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 38,159 psi | 88% | 1224 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 35,694 psi | 82% | 1371 fps | 99.9% |
| Somchem MP200² | <<locked>> | 72% | 35,984 psi | 83% | 1260 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 39,320 psi | 90% | 1273 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,956 psi | 85% | 1362 fps | 98.4% |
| Vihtavuori 3N37 | <<locked>> | 80% | 37,913 psi | 87% | 1325 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 39,044 psi | 90% | 1401 fps | 97.6% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 38,232 psi | 88% | 1437 fps | 99.6% |
| Vihtavuori N320² | <<locked>> | 72% | 38,261 psi | 88% | 1175 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,314 psi | 74% | 1047 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 37,594 psi | 86% | 1224 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 36,332 psi | 84% | 1243 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 35,998 psi | 83% | 1299 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 38,827 psi | 89% | 1214 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,883 psi | 85% | 1224 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% | 25,135 psi | 58% | 1099 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 21,843 psi | 50% | 1155 fps | 86% |
| Accurate No. 9*² | <<locked>> | 76% | 29,370 psi | 68% | 1283 fps | 85.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,846 psi | 59% | 1020 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 22,365 psi | 51% | 1024 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 29,805 psi | 69% | 1286 fps | 86.9% |
| ADI AP 100*² | 6.2 gr | 60% | 14,620 psi | 34% | 942 fps | 88.5% |
| ADI AP 70N² | <<locked>> | 60% | 31,575 psi | 73% | 1158 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,470 psi | 63% | 948 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 26,353 psi | 61% | 965 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,179 psi | 58% | 984 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,093 psi | 62% | 1050 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,800 psi | 52% | 1024 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 24,337 psi | 56% | 1191 fps | 86.7% |
| Alliant BULLSEYE² | <<locked>> | 60% | 28,703 psi | 66% | 1168 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,106 psi | 58% | 1024 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,157 psi | 37% | 955 fps | 99.9% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 21,234 psi | 49% | 1125 fps | 93.8% |
| Alliant RED DOT² | <<locked>> | 60% | 24,801 psi | 57% | 994 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,734 psi | 73% | 1214 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 22,437 psi | 52% | 1079 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,801 psi | 57% | 1014 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 16,041 psi | 37% | 892 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,614 psi | 61% | 1063 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 22,017 psi | 51% | 902 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 31,633 psi | 73% | 1250 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,122 psi | 19% | 653 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,585 psi | 61% | 1093 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 21,843 psi | 50% | 1155 fps | 86% |
| Lovex D037.2*² | <<locked>> | 76% | 30,008 psi | 69% | 1293 fps | 85.6% |
| Lovex S011² | <<locked>> | 60% | 32,271 psi | 74% | 1129 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 26,527 psi | 61% | 1112 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,740 psi | 48% | 991 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 23,003 psi | 53% | 1030 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,931 psi | 55% | 1020 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,643 psi | 59% | 1027 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 28,485 psi | 65% | 1017 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 92% | 33,982 psi | 78% | 1385 fps | 86% |
| Ramshot Silhouette² | <<locked>> | 60% | 31,270 psi | 72% | 1214 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,689 psi | 68% | 1102 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,803 psi | 18% | 663 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,639 psi | 47% | 1053 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 19,348 psi | 44% | 1083 fps | 86.3% |
| Rottweil P 801² | <<locked>> | 60% | 33,359 psi | 77% | 1115 fps | 100% |
| Rottweil P 806² | <<locked>> | 60% | 15,766 psi | 36% | 1043 fps | 95.1% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 30,008 psi | 69% | 1293 fps | 85.6% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 21,843 psi | 50% | 1155 fps | 86% |
| SNPE Vectan A0² | <<locked>> | 60% | 21,074 psi | 48% | 1024 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,483 psi | 59% | 1053 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,685 psi | 57% | 1060 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,979 psi | 67% | 997 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 17,825 psi | 41% | 1001 fps | 96.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,526 psi | 56% | 1060 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 23,815 psi | 55% | 1188 fps | 97.1% |
| Somchem MP200² | <<locked>> | 60% | 25,556 psi | 59% | 1125 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 23,482 psi | 54% | 1073 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 28,355 psi | 65% | 1237 fps | 95.7% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,392 psi | 47% | 1073 fps | 98.9% |
| Vihtavuori 3N38*² | 8.1 gr | 68% | 17,608 psi | 40% | 1043 fps | 85.7% |
| Vihtavuori N105*² | 8 gr | 68% | 14,446 psi | 33% | 1007 fps | 86% |
| Vihtavuori N320² | <<locked>> | 60% | 27,325 psi | 63% | 1053 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,837 psi | 32% | 787 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 26,426 psi | 61% | 1096 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,974 psi | 53% | 1070 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 18,144 psi | 42% | 1027 fps | 98.2% |
| Winchester 231² | <<locked>> | 60% | 34,098 psi | 78% | 1165 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,509 psi | 49% | 1024 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 67 powders for .357 Mag. loaded with the .357 | 160gr | Speer JSP SWC. Ramshot Enforcer delivers the highest muzzle velocity at 1,450 fps; across all powders the maximum-charge window runs from 883 fps to 1,450 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 30 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 37–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N105 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 3N38, Vihtavuori N105, ADI AP 100 rank at the top here: for .357 Mag. with the .357 | 160gr | Speer JSP SWC 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.