I agree with the last two posts. I don't recall reading how Colt felt about it, but Smith & Wesson was dead set against jacketed bullets in revolvers--even including their .35 auto. For it, they designed a lead bullet with a metal tip extending only to the ogive so it would feed from the magazine to the chamber, but the surface bearing against the rifling was lead. Those cartridges are collector's items.
Another line of thought was that replacing barrels in most autos is easy and cheap, but replacing revolver barrels isn't. Not that you're likely to shoot them that much, but still....
Dick