Load Specifications
Load data in caliber .357 Mag. with .357 | 158gr | Speer TMJ 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% | 35,911 psi | 83% | 1243 fps | 100% |
| Accurate No. 7² | <<locked>> | 76% | 39,247 psi | 90% | 1440 fps | 95.3% |
| Accurate No. 9* | <<locked>> | 84% | 38,609 psi | 89% | 1424 fps | 89.7% |
| Accurate Solo 1000² | <<locked>> | 76% | 38,421 psi | 88% | 1175 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 37,623 psi | 86% | 1224 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 38,363 psi | 88% | 1417 fps | 91% |
| ADI AP 100 | <<locked>> | 96% | 37,724 psi | 87% | 1362 fps | 99.8% |
| ADI AP 70N² | <<locked>> | 64% | 35,534 psi | 82% | 1214 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 39,262 psi | 90% | 1086 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 38,029 psi | 87% | 1106 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,956 psi | 85% | 1132 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,796 psi | 85% | 1175 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 35,346 psi | 81% | 1188 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 36,709 psi | 84% | 1398 fps | 93.4% |
| Alliant BULLSEYE² | <<locked>> | 68% | 35,418 psi | 81% | 1266 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 37,289 psi | 86% | 1181 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 39,073 psi | 90% | 1309 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,812 psi | 89% | 1421 fps | 99.7% |
| Alliant RED DOT | <<locked>> | 80% | 38,798 psi | 89% | 1171 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 36,608 psi | 84% | 1286 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 38,087 psi | 88% | 1302 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 38,014 psi | 87% | 1175 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,638 psi | 89% | 1194 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 38,479 psi | 88% | 1201 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,434 psi | 86% | 1099 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 36,477 psi | 84% | 1322 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,854 psi | 41% | 886 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 36,492 psi | 84% | 1224 fps | 100% |
| Lovex D037.1² | <<locked>> | 76% | 39,247 psi | 90% | 1440 fps | 95.3% |
| Lovex D037.2* | <<locked>> | 80% | 34,766 psi | 80% | 1375 fps | 88% |
| Lovex S011² | <<locked>> | 64% | 36,651 psi | 84% | 1188 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 37,913 psi | 87% | 1257 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 38,232 psi | 88% | 1224 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 39,204 psi | 90% | 1234 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 35,650 psi | 82% | 1175 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 38,189 psi | 88% | 1181 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,942 psi | 87% | 1132 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 96% | 38,435 psi | 88% | 1457 fps | 88% |
| Ramshot Silhouette² | <<locked>> | 64% | 35,520 psi | 82% | 1276 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 37,492 psi | 86% | 1201 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,491 psi | 38% | 896 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,912 psi | 85% | 1283 fps | 100% |
| ReloadSwiss RS 24 | <<locked>> | 80% | 35,752 psi | 82% | 1385 fps | 96% |
| Rottweil P 801² | <<locked>> | 64% | 37,463 psi | 86% | 1171 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 35,911 psi | 83% | 1394 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 34,766 psi | 80% | 1375 fps | 88% |
| Shooters World Major Pistol² | <<locked>> | 76% | 39,247 psi | 90% | 1440 fps | 95.3% |
| SNPE Vectan A0 | <<locked>> | 84% | 38,479 psi | 88% | 1263 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 36,129 psi | 83% | 1191 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 38,841 psi | 89% | 1240 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 39,059 psi | 90% | 1115 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 38,522 psi | 89% | 1329 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 37,463 psi | 86% | 1230 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 34,925 psi | 80% | 1375 fps | 99.8% |
| Somchem MP200² | <<locked>> | 72% | 36,172 psi | 83% | 1276 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 35,824 psi | 82% | 1247 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,956 psi | 85% | 1371 fps | 98.4% |
| Vihtavuori 3N37 | <<locked>> | 80% | 38,000 psi | 87% | 1339 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 96% | 38,957 psi | 90% | 1411 fps | 97.5% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 38,087 psi | 88% | 1450 fps | 99.6% |
| Vihtavuori N320² | <<locked>> | 72% | 37,579 psi | 86% | 1178 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 32,605 psi | 75% | 1060 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 36,898 psi | 85% | 1227 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 35,578 psi | 82% | 1243 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 36,114 psi | 83% | 1312 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 38,159 psi | 88% | 1220 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,999 psi | 85% | 1234 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% | 24,685 psi | 57% | 1102 fps | 100% |
| Accurate No. 7*² | <<locked>> | 60% | 21,843 psi | 50% | 1165 fps | 85.8% |
| Accurate No. 9* | <<locked>> | 80% | 33,315 psi | 77% | 1355 fps | 87.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,425 psi | 58% | 1024 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,973 psi | 51% | 1027 fps | 100% |
| Accurate TCM*² | <<locked>> | 76% | 29,704 psi | 68% | 1293 fps | 86.7% |
| ADI AP 100*² | 6.3 gr | 60% | 14,794 psi | 34% | 951 fps | 88.6% |
| ADI AP 70N² | <<locked>> | 60% | 31,923 psi | 73% | 1171 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,108 psi | 62% | 951 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,976 psi | 60% | 968 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,657 psi | 59% | 1001 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 27,499 psi | 63% | 1063 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 23,032 psi | 53% | 1037 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 80% | 23,801 psi | 55% | 1188 fps | 86.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 28,195 psi | 65% | 1171 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,512 psi | 59% | 1040 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,360 psi | 38% | 968 fps | 99.9% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 21,422 psi | 49% | 1138 fps | 93.8% |
| Alliant RED DOT² | <<locked>> | 60% | 24,453 psi | 56% | 997 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 32,053 psi | 74% | 1227 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 22,031 psi | 51% | 1083 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,395 psi | 56% | 1017 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,751 psi | 36% | 896 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,760 psi | 62% | 1073 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,698 psi | 50% | 906 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 31,749 psi | 73% | 1263 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,383 psi | 19% | 669 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 26,121 psi | 60% | 1096 fps | 100% |
| Lovex D037.1*² | <<locked>> | 60% | 21,843 psi | 50% | 1165 fps | 85.8% |
| Lovex D037.2*² | <<locked>> | 76% | 29,907 psi | 69% | 1302 fps | 85.4% |
| Lovex S011² | <<locked>> | 60% | 32,677 psi | 75% | 1142 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 26,020 psi | 60% | 1115 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 21,060 psi | 48% | 1007 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,640 psi | 52% | 1033 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,540 psi | 54% | 1024 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 25,251 psi | 58% | 1030 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 28,036 psi | 64% | 1020 fps | 100% |
| Ramshot Enforcer* | <<locked>> | 92% | 33,736 psi | 78% | 1394 fps | 85.8% |
| Ramshot Silhouette² | <<locked>> | 60% | 31,430 psi | 72% | 1227 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,994 psi | 69% | 1119 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,687 psi | 18% | 663 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,900 psi | 48% | 1066 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 60% | 18,956 psi | 44% | 1083 fps | 85.7% |
| Rottweil P 801² | <<locked>> | 60% | 33,678 psi | 77% | 1132 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 15,795 psi | 36% | 1053 fps | 94.9% |
| Shooters World Heavy Pistol*² | <<locked>> | 76% | 29,907 psi | 69% | 1302 fps | 85.4% |
| Shooters World Major Pistol*² | <<locked>> | 60% | 21,843 psi | 50% | 1165 fps | 85.8% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,726 psi | 48% | 1027 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,788 psi | 59% | 1066 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,947 psi | 57% | 1073 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,457 psi | 68% | 1010 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 17,999 psi | 41% | 1010 fps | 96.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,831 psi | 57% | 1073 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 23,293 psi | 54% | 1188 fps | 96.8% |
| Somchem MP200² | <<locked>> | 60% | 25,817 psi | 59% | 1138 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 23,076 psi | 53% | 1076 fps | 100% |
| Somchem S221² | <<locked>> | 60% | 28,427 psi | 65% | 1250 fps | 95.6% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,566 psi | 47% | 1086 fps | 98.9% |
| Vihtavuori 3N38*² | 8.2 gr | 68% | 17,709 psi | 41% | 1053 fps | 85.6% |
| Vihtavuori N105*² | 8 gr | 68% | 14,127 psi | 32% | 1007 fps | 85.3% |
| Vihtavuori N320² | <<locked>> | 60% | 26,832 psi | 62% | 1056 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 13,619 psi | 31% | 791 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 25,933 psi | 60% | 1099 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 22,553 psi | 52% | 1073 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 17,782 psi | 41% | 1027 fps | 97.9% |
| Winchester 231² | <<locked>> | 60% | 34,403 psi | 79% | 1178 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,727 psi | 50% | 1037 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 | 158gr | Speer TMJ. Ramshot Enforcer delivers the highest muzzle velocity at 1,457 fps; across all powders the maximum-charge window runs from 886 fps to 1,457 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 29 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 38–90 %, 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 | 158gr | Speer TMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 9, Accurate TCM, Alliant BLUE DOT 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.