I have always had a soft spot in my heart for black powder cap & ball revolvers and have been shooting them off & on since the late 1970's. This model was the first design by Colt that was practical as a belt pistol yet still had satisfactory stopping power. Almost all prior incarnations by Colt were so big and heavy that they were carried in saddle holsters on horses. Wild Bill Hickok, Robert E. Lee, & Doc Holiday, to name a few, carried the Colt 1851 Navy. The gun was so popular that Colt produced it all the way up to 1873. By then cartridge revolvers were common place.
They take about 5 minutes to load, smoke like crazy and foul up the gun quickly. Typically I only shoot 25-35 balls before the action is so dirty that the cylinder doesn't want to turn smoothly. They weren't designed to shoot a lot. Many gun fighters like Hickok carried 2 or 3 at a time in waist belts and just switched to the next gun after the first one was empty!