Late post, apologies, but the .32-40 was a popular British double rifle chambering for decades. Kynoch loaded the ammo for probably half a century.

Here's a lovely little high-grade Tolley belonging to a Darwin resident:

32/40 EX CORDITE 27 1/2 - 165gr MAX

This cartridge is just like a mini- .450 NE. Marvellous fun to shoot! ...and very capable on medium-sized game like deer/boar/blackies up close if you can shoot!