.303 Brit "T.M. B-31"


#1

May anyone remind me the inspector’s name with these T.M. initials?
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#2

Vlad, that is still unknown.

However in Italy this cartridge would be listed as “7.7 mm Breda” instead of “303 british”. They are dimensionally identical but the Breda round was intended for use in machine gun only and had a stronger case