My memory appears to be improving with age!

Found the Taylor reference. He calls it the .315 Austrian Mannlicher.
"The BSA people used to make a magazine rifle to handle it because of its low chamber pressure."

Single paragraph immediately preceeding the 8x57 entry.

Buffalo Arms has 8x50R Austrian brass. The * indicates they form it from a more readily available case. You could call and ask what case they start with, though at $41/50 it's not worth my time to form cases.

SOS