Load Specifications
Load data in caliber .357 Mag. with .357 | 125gr | Speer Hollow Point Gold Dot 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% | 35,114 psi | 81% | 1453 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 38,159 psi | 88% | 1654 fps | 92.6% |
| Accurate Solo 1000² | <<locked>> | 76% | 37,376 psi | 86% | 1378 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 36,782 psi | 85% | 1434 fps | 100% |
| Accurate TCM* | <<locked>> | 84% | 37,144 psi | 85% | 1614 fps | 87.7% |
| ADI AP 100 | <<locked>> | 96% | 37,159 psi | 85% | 1581 fps | 98.8% |
| ADI AP 70N² | <<locked>> | 68% | 38,406 psi | 88% | 1470 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 39,088 psi | 90% | 1286 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 37,855 psi | 87% | 1306 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 36,753 psi | 84% | 1339 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 36,695 psi | 84% | 1388 fps | 100% |
| Alliant BE-86 | <<locked>> | 80% | 38,856 psi | 89% | 1444 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 35,853 psi | 82% | 1604 fps | 90.4% |
| Alliant BULLSEYE² | <<locked>> | 72% | 38,508 psi | 89% | 1535 fps | 100% |
| Alliant Green Dot² | <<locked>> | 76% | 36,216 psi | 83% | 1385 fps | 100% |
| Alliant Herco | <<locked>> | 96% | 38,435 psi | 88% | 1532 fps | 100% |
| Alliant POWER PISTOL | <<locked>> | 80% | 38,072 psi | 88% | 1644 fps | 98.6% |
| Alliant RED DOT | <<locked>> | 80% | 38,421 psi | 88% | 1381 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 35,027 psi | 81% | 1490 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 37,057 psi | 85% | 1519 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 76% | 36,898 psi | 85% | 1375 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 96% | 38,189 psi | 88% | 1401 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 72% | 37,449 psi | 86% | 1401 fps | 100% |
| Hodgdon Clays | <<locked>> | 84% | 36,230 psi | 83% | 1286 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 35,143 psi | 81% | 1529 fps | 99.9% |
| Hodgdon Longshot² | <<locked>> | 64% | 39,015 psi | 90% | 1575 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 17,448 psi | 40% | 1040 fps | 100% |
| Hodgdon Universal² | <<locked>> | 76% | 39,204 psi | 90% | 1480 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 38,159 psi | 88% | 1654 fps | 92.6% |
| Lovex S011² | <<locked>> | 64% | 35,215 psi | 81% | 1385 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 36,361 psi | 84% | 1463 fps | 100% |
| Maxam CSB 1 | <<locked>> | 84% | 37,753 psi | 87% | 1440 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 37,898 psi | 87% | 1440 fps | 100% |
| Maxam CSB 3 | <<locked>> | 80% | 38,290 psi | 88% | 1421 fps | 100% |
| Maxam CSB 4² | <<locked>> | 76% | 36,912 psi | 85% | 1385 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 37,782 psi | 87% | 1339 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 34,490 psi | 79% | 1483 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 36,289 psi | 83% | 1404 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 15,983 psi | 37% | 1047 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 36,143 psi | 83% | 1499 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 34,867 psi | 80% | 1588 fps | 93.4% |
| Rottweil P 801² | <<locked>> | 64% | 36,477 psi | 84% | 1371 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 35,070 psi | 81% | 1608 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 38,159 psi | 88% | 1654 fps | 92.6% |
| SNPE Vectan A0 | <<locked>> | 84% | 37,840 psi | 87% | 1483 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 76% | 38,624 psi | 89% | 1437 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 76% | 37,681 psi | 87% | 1447 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 72% | 38,682 psi | 89% | 1316 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 36,956 psi | 85% | 1532 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 76% | 37,173 psi | 85% | 1447 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 76% | 38,595 psi | 89% | 1654 fps | 99.5% |
| Somchem MP200² | <<locked>> | 72% | 35,694 psi | 82% | 1493 fps | 100% |
| Somchem MS200 | <<locked>> | 80% | 38,464 psi | 88% | 1503 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 36,216 psi | 83% | 1581 fps | 96.5% |
| Vihtavuori 3N37 | <<locked>> | 80% | 36,114 psi | 83% | 1545 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 92% | 36,129 psi | 83% | 1594 fps | 94.8% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 36,854 psi | 85% | 1663 fps | 98.2% |
| Vihtavuori N320² | <<locked>> | 72% | 35,839 psi | 82% | 1375 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 37,420 psi | 86% | 1309 fps | 100% |
| Vihtavuori N330² | <<locked>> | 76% | 38,072 psi | 88% | 1463 fps | 100% |
| Vihtavuori N340 | <<locked>> | 80% | 38,682 psi | 89% | 1506 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 36,912 psi | 85% | 1549 fps | 100% |
| Winchester 231² | <<locked>> | 64% | 37,246 psi | 86% | 1427 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 36,564 psi | 84% | 1450 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% | 24,250 psi | 56% | 1286 fps | 100% |
| Accurate No. 7*² | <<locked>> | 68% | 28,311 psi | 65% | 1483 fps | 87.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 25,106 psi | 58% | 1204 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 21,712 psi | 50% | 1204 fps | 100% |
| Accurate TCM* | <<locked>> | 80% | 32,735 psi | 75% | 1545 fps | 85.4% |
| ADI AP 100*² | 8 gr | 64% | 16,085 psi | 37% | 1145 fps | 87% |
| ADI AP 70N² | <<locked>> | 60% | 30,705 psi | 71% | 1365 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 27,209 psi | 63% | 1132 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 25,454 psi | 59% | 1138 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 25,034 psi | 58% | 1175 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 26,716 psi | 61% | 1247 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 22,321 psi | 51% | 1207 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 28,906 psi | 66% | 1480 fps | 86.6% |
| Alliant BULLSEYE² | <<locked>> | 60% | 27,760 psi | 64% | 1371 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 24,352 psi | 56% | 1211 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 15,882 psi | 37% | 1115 fps | 98.9% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 20,813 psi | 48% | 1302 fps | 90.5% |
| Alliant RED DOT² | <<locked>> | 60% | 24,105 psi | 55% | 1178 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 31,256 psi | 72% | 1434 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 21,828 psi | 50% | 1266 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 24,149 psi | 56% | 1201 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 15,606 psi | 36% | 1050 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 26,020 psi | 60% | 1250 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,727 psi | 50% | 1076 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 30,690 psi | 71% | 1457 fps | 99.3% |
| Hodgdon Longshot² | <<locked>> | 60% | 34,011 psi | 78% | 1506 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,847 psi | 18% | 768 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 25,947 psi | 60% | 1289 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 28,311 psi | 65% | 1483 fps | 87.5% |
| Lovex S011² | <<locked>> | 60% | 31,183 psi | 72% | 1329 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 25,135 psi | 58% | 1299 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 20,233 psi | 47% | 1168 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 22,133 psi | 51% | 1211 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,902 psi | 53% | 1198 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 24,758 psi | 57% | 1211 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 27,833 psi | 64% | 1207 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 30,429 psi | 70% | 1424 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 28,616 psi | 66% | 1302 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 7,469 psi | 17% | 768 fps | 99.3% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 20,305 psi | 47% | 1240 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 24,163 psi | 56% | 1378 fps | 87.1% |
| Rottweil P 801² | <<locked>> | 60% | 32,605 psi | 75% | 1322 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 14,982 psi | 34% | 1188 fps | 90.9% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 28,311 psi | 65% | 1483 fps | 87.5% |
| SNPE Vectan A0² | <<locked>> | 60% | 20,059 psi | 46% | 1191 fps | 99.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 25,063 psi | 58% | 1247 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 24,250 psi | 56% | 1250 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 29,066 psi | 67% | 1191 fps | 100% |
| SNPE Vectan BA7 1/2*² | 7.9 gr | 60% | 17,100 psi | 39% | 1152 fps | 93.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 23,931 psi | 55% | 1250 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 22,843 psi | 53% | 1368 fps | 94.1% |
| Somchem MP200² | <<locked>> | 60% | 25,121 psi | 58% | 1322 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 22,814 psi | 52% | 1257 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 27,456 psi | 63% | 1427 fps | 92.8% |
| Vihtavuori 3N37² | <<locked>> | 60% | 20,044 psi | 46% | 1253 fps | 97% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 22,945 psi | 53% | 1348 fps | 87.2% |
| Vihtavuori N105*² | 10.7 gr | 76% | 17,579 psi | 40% | 1270 fps | 86.2% |
| Vihtavuori N320² | <<locked>> | 60% | 26,194 psi | 60% | 1243 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 15,403 psi | 35% | 978 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 24,352 psi | 56% | 1270 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 21,872 psi | 50% | 1247 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 18,202 psi | 42% | 1207 fps | 96.2% |
| Winchester 231² | <<locked>> | 60% | 33,344 psi | 77% | 1378 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 21,002 psi | 48% | 1204 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 | 125gr | Speer Hollow Point Gold Dot. Vihtavuori N105 delivers the highest muzzle velocity at 1,663 fps; across all powders the maximum-charge window runs from 1,040 fps to 1,663 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 29 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 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 N105, ADI AP 100, SNPE Vectan BA7 1/2 rank at the top here: for .357 Mag. with the .357 | 125gr | Speer Hollow Point Gold Dot they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Accurate TCM, Alliant BLUE DOT burn incompletely and react more sensitively to barrel length and temperature. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon Clays 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.