As I recall, Elmer wrote that once the .44 Mag came out he saw no need to hot rod the .44 Spl.
The ballon head case afforded more boiler room and thus he upped the charge in his specials as I recall.
I would estimate that his reference to “hot rodding” involved the magnum type loads utilizing then Hercules 2400 rather than the Skelton loads of mid weight charges of Unique (7.5 gr.)
Three44s