The 'UMC' headstamp was replaced ca1912 by the 'REM-UMC' HS. The corrugated REM-UMC hull was incorporated in 1934 and their star crimp was fully incorporated by 1947. The original 'SUPER-X' loads were made with 'FIELD' hulls from 1922 until sometime in the 1930s. I would have to do some digging for info on the Winchester shell.


GMC(SW) - USN, Retired (1978-2001)