The .357 Magnum is a useful and fun cartridge when fired from a revolver. Shot from the longer barrel of a rifle, though, the .357 shows a pronounced improvement in velocity and trajectory. I thought that higher velocity was everything I wanted when I started handloading a variety of powders and bullets for a .357 Magnum Uberti Lightning Short Rifle pump action with a 20-inch barrel. As it turned out, the best part was loading and shooting lead-alloy bullets in the fast-cycling Lightning...