Were any Maynard rifles made in 25 caliber from the factory?
Aaron

The 25/20 Single Shot chambering was introduced in the Maynard. In the 1890 catalog is a report of O.M. Jewell's work with the new 25 caliber rifle. At a shoot in Lawrence, Mass June 21, 1890 he shot a 97 from rest and a score of 90 offhand. The shooting was done without cleaning and the offhand score was 4 points higher than any by a larger caliber.

I've seen 25 rimfire barrels marked "Rebored and rifled by J. Stevens Arms Co." or some such marking. I suppose they were reworked 22 barrels but because they were done by Stevens after they bought the assets of Maynard I guess they don't count.

In the 1894 Wimbledon Cup Match E.A. Leopold shot what was simply listed as a 25-40 Maynard. Mr. Leopold was a Maynard fan and shot many of them over the years. Research indicates that the cartridge was probably a 32-40 Ballard or Winchester, whichever you choose, necked down to 25 caliber. The cartridge was introduced in 1895 in the Marlin 1893 as the 25-36 Marlin which was nearly identical to the Winchester 25-35. 

Dr. Maynard had passed away and the assets of his company purchased  by Stevens by then. The origin of his barrel is not known but was probably custom made. It was probably called a 25-40 Maynard simply because Leopold was shooting a Maynard in a special 25 caliber.

No one would think of the 25-36 Marlin or 25-35 Winchester as a 1000 yd. cartridge these days for sure. The match conditions were quite bad with rain, wind and dark skies such that only 10 riflemen decided to compete. Mr. Leopold finished dead last of the competitors with a score of 55 out of a possible 150. That probably sealed the fate of 25 caliber cartridges in long range matches for many years.