.357 mag American Eagle 158 gr JSP fired from Marlin 1894C 18.5" barrel lever action carbine into calibrated gelatin.
BB: 585.6 fps, 3.7"
Impact velocity: 1,840 fps
Penetration: 15.1"
Retained weight: 153.8 gr
Max expansion: 0.892"
Min expansion: 0.674"
10mm Littlestone 155 gr Barnes XPB fired from 4.5" EAA Witness through four layers of denim into calibrated gelatin.
BB: 585.6 fps, 3.7"
Impact velocity: 1,128 fps
Penetration: 12.8"
Retained weight: 155.3 gr
Max expansion: 0.751"
Min expansion: 0.470"
For comparison, here’s an older test of the same .357 load from a 4" revolver:
Federal American Eagle 158 gr Jacketed Soft Point fired from 4" S&W Model 13 into calibrated gelatin through four layers of denim.
BB calibration: 607 fps, 3.4"
Impact velocity: 1,182 fps
Penetration: 22.1"
Retained weight: 157.3 gr
Max expansion: 0.398"
Min expansion: 0.363"
