I've recently gotten bit by the big bore Smith and Wesson revolver bug. I own and love to shoot a .44 Ruger Redhawk, but the 4" Smith .44s and .45s are so much easier to pack and have a lot better trigger actions. I am planning on purchasing two revolvers, a Model 25-5 .45 Colt 4" and a Model 629-2 Mountain Gun (actually this gun has the mountain barrel but with no mountain revolver markings). I thought that these two revolvers would be ideal packing guns for my wife and I on our ranch. I've already posted my question on the 25-5. I thought that the 629 being designed for magnum rounds would be more durable. Then I began to run across people who were telling me that the Smith 29 and 629 would not hold up to steady shooting with magnum rounds. My question is this: How many magnum rounds can I shoot in my Smith before it starts to fall apart? I'd like to shoot 260-270 cast bullets at 1200 fps. Many people tell me to get a Ruger single action. If the Smith was so weak, why did old Elmer Keith carry a Model 29 and not a .44 Blackhawk?