I found this on the web. Long read. Lots of information.   The Henry Repeating Rifle Article by Andrew L. Bresnan The Henry rifle story is a very interesting story. It was the first successful repeating rifle that evolved into some of the best lever action rifles in the world, the Winchesters. The first of the Winchesters was the Model 1866. This rifle was nothing more than an improved Henry using the same ammunition. The Model 1866 included a redesigned magazine that was not ope