There is a lot of palaver concerning the correctness of the term .45 "Long" Colt. To be sure, the correct title is ".45 Colt." Purists argue there never was a .45 Short Colt, but then:
Seems that in the early Twentieth Century, competition between Colt and S&W was such that Colt didn't want to acknowledge the existance of the S&W round, so they prevailed on one ammunition maker to call the round the .45 Colt Government. Ammunition makers tried to load the 250 Colt bullet into S&W cases and call that a .45 Colt round, but the public would have not of that, they wanted the long cased .45 Colt round, hence the .45 "Long" Colt.
Clear?
Bob Wright