Dunno. I use a different shell plate for 45 Schofield than I use for 44-40 and 38-40 on my Hornaday AP Lock and Load progressive press. Just checked. 45 Schofield does not fit into the shell plate I use for 44-40 and 38-40. Perhaps it will work with different brands of shell plates/shell holders, but not with my Hornady shell plates.