By 1910 UMC was no longer listing the .30 Long. It was dropped earlier than I thought it had been.
Whoa. The .30 Short was apparently popular enough that it made it past WW I with Remington but it was gone from the 1923 catalog.
And by 1923 Remington-UMC had dropped production of the Spencer cartridges.
As for the tooling, I'm guessing not. My guess is that much of the old and largely obsolete production equipment was replaced with new equipment during World War II and the old equipment recycled for the war effort.
