Your question was a bit unclear; after rereading the posts, I assume you were referring to the .45 Long Colt. I took the answer to say that Winchester never made a .45 caliber rifle, which is of course, incorrect. The .45-90 was of plainly a .45 caliber, which will also chamber the .45-70, but in line with your answer, I don't think there was a pistol in the world that would fire that round.
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Smith & Wesson made a break open pistol which was much easier and faster to reload, designed especially to facilitate reloading while on horseback. From memory, I believe it was single action, but not sure.