Indian .455 Webley


I have come across a strange round which I believe is some sort of Webley cartridge similar to a .455 but smaller in all ways. Please can you help me identify it using the information below.

Headstamp information:

I Looks like a letter I with an arrow above it.


Cartridge dimensions
Rim thickness 0.026


By the headstamp, it should be a .455 MkII cartridge, made in India. Am I correct in assuming it has a RN lead bullet and no visible grease grooves?


Jon is right. This is a Webley .455 Mark II ball round made at Dum Dum Arsenal, Calcutta, India.

The broad arrow over I is the Indian government ownership mark, just as the plain broad arrow is the British government mark.