We don't have the answer to what you originally
asked...its now convenient for you to narrow it
to what a few forum owners think.

Look outside the restrictions of those forums
and you will see gunwriters past and present
as well as gunmakers and PHs refering to .375
as medium .and they have been doing so
for several decades before the net emerged .

-Bulletproof and Waterproof don't mean Idiotproof.