I was wondering what advantage the 357 max has over a 44 mag or a 45 Ruger only load.
Yep, this. The 44 mag would take the targets down, the ram weighs over 50 pounds, but the 357 SM/Max shoots a higher BC 180-200 gn bullet faster and flatter. Never seen someone use a 45 Colt in silhouette. It may have happened but I never seen it.Faster and flatter. Cartridge designed for silhouette competition using 180 gr TMJ bullets.
Short version
Better have hearing protectionimpressive FPS at 1998 and with a 200gr at 1600 plus. good time to mention im not easily impressed. be a great back bear or deer hand gun hunting with that 10in barrel black hawk.