375 flanged 1,52mm
375 h&h rim thickness 1,27mm, length from head to belt5,59mm
375 2,5" rim thickness 1,63, dia.13,41mm

this is max. in the CIP list

have only one time work with bertram, was 11,2x60R mauser,the brass was to hard. careful anealing is maybe allways the secret with problem brass.