I try and watch old episodes of the old western The Rifleman whenever I can. I've been wondering what caliber rifle he used and finally found the answer on The Rifleman's web site: His 1892 Winchester used the old 44.40 round, as I'd guessed. That site also pointed out a continuity problem with the show: His rifle, manufactured in 1892, was actually made after the show's supposed period of time of 1880.
I'd love to be able to see those old rifles. One was supposedly given to the late Arnold Palmer. The other was sold to former Secretary of the Treasury, Bill Simon. Fun stuff to know, huh?