The 19th century's legendary Colt Single Action Army Revolver rides on in the 21st. Why would anyone today want to stake their life on a gun with a 146-year-old design and a 183-year-old lock work design? Well, there are good reasons, such as power and ease of hitting with the best pointing and fastest revolver ever made. I’m talking about Colt’s legendary M1873 Single Action Army .45 revolver. Its .45 Colt cartridge was designed to put down a cavalry horse at 100 yards with one shot. The original load was a 250-grain bullet over 40 grains of black powder that...