Forgive my ignorance but this cartridge just arrived mixed in with some other stuff. It seems like a regular 6,5x58 Portuguese with the headstamp ‘KYNOCH 6.5mmM.’ but the matter I don’t understand is the ‘ICI’ marking on the primer. Is this a commercial loading? Was it usual for primers to be thus marked on military contract ammunition? If commercial, was it much used?
In anticipation, Peter