Just got this high wall rifle, with weaver K12 scope. I guess the receiver is a winchester so I looked up the serial # and the receiver dates 1887. It has a 24" barrel marked J.R. Buhmiller. It looks like .22 cal ,but not sure which it's chambered for. I plan on making a chamber cast to see. Did J.R. Buhnmiller build the rifle or only the barrel? I'm new to collecting single rifles, anybody wants to add some info I would appreciated. Thanks Bernie