Load Specifications
Load data in caliber .357 Mag. with .357 | 140gr | Speer JHP 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 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% | 35,317 psi | 81% | 1352 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 38,464 psi | 88% | 1545 fps | 93.9% |
| Accurate No. 9* | <<locked>> | 84% | 37,768 psi | 87% | 1526 fps | 88% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,724 psi | 87% | 1276 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 37,913 psi | 87% | 1339 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 37,869 psi | 87% | 1522 fps | 89.5% |
| ADI AP 100 | <<locked>> | 96% | 37,275 psi | 86% | 1473 fps | 99.4% |
| ADI AP 70N² | <<locked>> | 64% | 35,215 psi | 81% | 1322 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 38,508 psi | 89% | 1181 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,768 psi | 87% | 1207 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,709 psi | 84% | 1234 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 37,086 psi | 85% | 1286 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 39,175 psi | 90% | 1339 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 36,390 psi | 84% | 1506 fps | 92% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,783 psi | 89% | 1424 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 37,434 psi | 86% | 1293 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,522 psi | 89% | 1421 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,653 psi | 89% | 1539 fps | 99.3% |
| Alliant RED DOT | <<locked>> | 80% | 38,435 psi | 88% | 1273 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 36,056 psi | 83% | 1391 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 37,826 psi | 87% | 1417 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 37,724 psi | 87% | 1280 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,682 psi | 89% | 1302 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,739 psi | 87% | 1302 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 76% | 38,014 psi | 87% | 1352 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 37,057 psi | 85% | 1194 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 35,578 psi | 82% | 1427 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,593 psi | 40% | 965 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 36,085 psi | 83% | 1332 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 38,464 psi | 88% | 1545 fps | 93.9% |
| Lovex D037.2* | <<locked>> | 84% | 39,305 psi | 90% | 1545 fps | 88.6% |
| Lovex S011² | <<locked>> | 64% | 35,723 psi | 82% | 1286 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,898 psi | 85% | 1358 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 38,261 psi | 88% | 1335 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 38,363 psi | 88% | 1339 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 39,204 psi | 90% | 1322 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 37,347 psi | 86% | 1280 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,710 psi | 87% | 1234 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 35,578 psi | 82% | 1391 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 37,173 psi | 85% | 1306 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 16,186 psi | 37% | 971 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,347 psi | 84% | 1391 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 35,476 psi | 82% | 1490 fps | 94.8% |
| Rottweil P 801² | <<locked>> | 64% | 37,231 psi | 86% | 1276 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 35,592 psi | 82% | 1506 fps | 100% |
| Shooters World Heavy Pistol* | <<locked>> | 84% | 39,305 psi | 90% | 1545 fps | 88.6% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 38,464 psi | 88% | 1545 fps | 93.9% |
| SNPE Vectan A0 | <<locked>> | 84% | 38,841 psi | 89% | 1381 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 35,317 psi | 81% | 1293 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 38,450 psi | 88% | 1345 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,711 psi | 89% | 1214 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 37,492 psi | 86% | 1430 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 37,565 psi | 86% | 1342 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 34,780 psi | 80% | 1486 fps | 99.4% |
| Somchem MP200² | <<locked>> | 72% | 35,752 psi | 82% | 1385 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 39,204 psi | 90% | 1398 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,724 psi | 84% | 1483 fps | 97.6% |
| Vihtavuori 3N37 | <<locked>> | 80% | 37,188 psi | 85% | 1450 fps | 100% |
| Vihtavuori 3N38 | <<locked>> | 92% | 37,115 psi | 85% | 1499 fps | 96.1% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 37,623 psi | 86% | 1558 fps | 99% |
| Vihtavuori N320² | <<locked>> | 72% | 36,245 psi | 83% | 1273 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 37,855 psi | 87% | 1214 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,551 psi | 89% | 1358 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,812 psi | 89% | 1398 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 37,985 psi | 87% | 1450 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 38,421 psi | 88% | 1332 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 37,014 psi | 85% | 1345 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% | 24,366 psi | 56% | 1194 fps | 100% |
| Accurate No. 7*² | <<locked>> | 64% | 25,106 psi | 58% | 1325 fps | 86.8% |
| Accurate No. 9* | <<locked>> | 80% | 32,953 psi | 76% | 1453 fps | 85.6% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,164 psi | 58% | 1115 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 22,104 psi | 51% | 1122 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 33,054 psi | 76% | 1450 fps | 87.1% |
| ADI AP 100*² | 6.9 gr | 60% | 14,475 psi | 33% | 1020 fps | 86.5% |
| ADI AP 70N² | <<locked>> | 60% | 31,169 psi | 72% | 1270 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,499 psi | 63% | 1047 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,976 psi | 60% | 1056 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,614 psi | 59% | 1093 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,977 psi | 62% | 1155 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,568 psi | 52% | 1122 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 84% | 26,629 psi | 61% | 1339 fps | 86.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,891 psi | 64% | 1273 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 25,164 psi | 58% | 1129 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 16,273 psi | 37% | 1050 fps | 99.5% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 21,016 psi | 48% | 1220 fps | 92.2% |
| Alliant RED DOT² | <<locked>> | 60% | 24,569 psi | 56% | 1093 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,879 psi | 73% | 1339 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,872 psi | 50% | 1175 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,555 psi | 56% | 1112 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,882 psi | 37% | 978 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,542 psi | 61% | 1165 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 24,149 psi | 56% | 1165 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,988 psi | 51% | 997 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 31,357 psi | 72% | 1365 fps | 99.8% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 8,238 psi | 19% | 725 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,933 psi | 60% | 1194 fps | 100% |
| Lovex D037.1*² | <<locked>> | 64% | 25,106 psi | 58% | 1325 fps | 86.8% |
| Lovex D037.2* | <<locked>> | 80% | 34,301 psi | 79% | 1476 fps | 86.3% |
| Lovex S011² | <<locked>> | 60% | 32,184 psi | 74% | 1243 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,440 psi | 58% | 1207 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,523 psi | 47% | 1089 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,611 psi | 52% | 1129 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 23,815 psi | 55% | 1122 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,889 psi | 57% | 1119 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,833 psi | 64% | 1115 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 31,140 psi | 72% | 1332 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 29,559 psi | 68% | 1214 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,556 psi | 17% | 715 fps | 99.8% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,537 psi | 47% | 1155 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 64% | 21,828 psi | 50% | 1237 fps | 86.8% |
| Rottweil P 801² | <<locked>> | 60% | 32,967 psi | 76% | 1227 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 15,476 psi | 36% | 1125 fps | 93.1% |
| Shooters World Heavy Pistol* | <<locked>> | 80% | 34,301 psi | 79% | 1476 fps | 86.3% |
| Shooters World Major Pistol*² | <<locked>> | 64% | 25,106 psi | 58% | 1325 fps | 86.8% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,595 psi | 47% | 1115 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,295 psi | 58% | 1158 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,468 psi | 56% | 1161 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,153 psi | 67% | 1102 fps | 100% |
| SNPE Vectan BA7 1/2² | 7.3 gr | 60% | 17,448 psi | 40% | 1083 fps | 95.4% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 24,598 psi | 57% | 1168 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 60% | 22,960 psi | 53% | 1276 fps | 95.5% |
| Somchem MP200² | <<locked>> | 60% | 25,019 psi | 57% | 1224 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,843 psi | 53% | 1165 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 27,760 psi | 64% | 1339 fps | 94.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,175 psi | 46% | 1168 fps | 98% |
| Vihtavuori 3N38*² | <<locked>> | 72% | 20,784 psi | 48% | 1211 fps | 87% |
| Vihtavuori N105*² | 9.4 gr | 72% | 16,070 psi | 37% | 1142 fps | 86.1% |
| Vihtavuori N320² | <<locked>> | 60% | 26,571 psi | 61% | 1152 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,737 psi | 36% | 909 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,395 psi | 56% | 1175 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,973 psi | 51% | 1158 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 18,608 psi | 43% | 1132 fps | 97.5% |
| Winchester 231² | <<locked>> | 60% | 34,084 psi | 78% | 1283 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,248 psi | 49% | 1119 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 15 powders for .357 Mag. loaded with the .357 | 140gr | Speer JHP. Vihtavuori N105 delivers the highest muzzle velocity at 1,558 fps; across all powders the maximum-charge window runs from 965 fps to 1,558 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 15 of the 15 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (300 MPa), the top charges use 37–89 %, leaving at least 11 % 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 N105, ADI AP 100, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .357 | 140gr | Speer JHP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant BLUE DOT burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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.