I had an Automag III in .30 Carbine; it was a great gun to shoot, very loud and massive muzzle blast, but very little recoil; the grip was fairly long to accommodate the cartridge length. Unfortunately, it was stolen years ago.
Get ready to write a check for a .357 Automag in decent condition. It's also a bottlenecked pistol cartridge, which are harder to reload.
NRA Endowment & DSC Lifer