The 46-50-400 WCF is a rare experimental cartridge by Winchester dating from 1912 for a Model 1886 rifle that was never marketed. There was a reference to the 46 WCF in IAA Journal #380 Nov/Dec ’94 which quoted a Gun Report article from Feb. 1956 p.9. The first specimen is the earlier version with no headstamp and the slightly shorter case with the second being the final version with the protected primer and FMJ bullet with copper express tube. See also Hoyem Vol. 4 p.87.
