The cartridge in Mike's article was stamped 45 COLT, bottom, REM-UMC, top with a copper primer stamped with a U. His is the same as mine, but Winchester and Frankfort Arsenal made them too. Mike's article was in Shooting Times, November 1997, page 14. A couple of other references are:
Sixguns by Keith, page 285.
Cartridges of the World, 9th Edition, page 306.
Bye
Jack