Marlin 1894 or 1894c in 44mag or 357mag. will suite you well. Also install an Ashley Ghost Ring sight on it. Fast sight picture and real accurate. I have this set-up in the Marlin 1894c 357mag. I shootfactory Federal American Eagle 158 grain soft nose at a chronographed 1835fps. out of my gun. Nice to shot and very accurate. A Ruger Blackhawk Bisley revolver would make a perfect match to the rifle with a horse.