Load data for .357 Mag. + 125gr Sierra JSP FN
Based on C.I.P., the max. allowed case length is 1.290 in / 32.77 mm, the max. cartridge length is 1.590 in / 40.39 mm, and the max. allowed pressure is 43,511 PSI / 3,000 bar.
Based on C.I.P., the max. allowed case length is 1.290 in / 32.77 mm, the max. cartridge length is 1.590 in / 40.39 mm, and the max. allowed pressure is 43,511 PSI / 3,000 bar.
Load Specifications
ImperialMetric
Bullet:.357 | 125gr | JSP FN
Cartridge:.357 Mag. load data
Case Length (L3):1.290" | 32.8 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.247" | 6.3 mm
Case Capacity:25.6 gow | 1.66 cm³
Primer Size:Small Pistol Magnum (SPM)
Max. Pressure (C.I.P.):43,511 psi | 3,000 bar
Barrel Length:6.0" | 152 mm
Min. Twist Rate:Stabilizes in any common twist
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Community Loads for .357 Mag. + 125gr Sierra JSP FN
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 16.1 gr | 1.590" | 5.6" | 1572 fps | ••• | |
| 16.4 gr | 1.590" | 5.6" | 1600 fps | ••• | |
| 16.7 gr | 1.590" | 5.6" | 1631 fps | ••• | |
| ••• | 1.590" | 5.6" | 1463 fps | ••• | |
| ••• | 1.590" | 5.6" | 1574 fps | ••• | |
| ••• | 1.590" | 5.6" | 1624 fps | ••• | |
| ••• | 1.590" | 5.6" | 1685 fps | ••• | |
| ••• | 1.575" | — | 799 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.