Hello 93x64mm,

According to the Handloader's Manual of Cartridge Conversions, you can make 11.2x72 cases from 404J brass. Case capacity in water is virtually identical. Also some old Bertram brass measured .441. The new stuff measures .436. Spinning a 404J case in a lathe and touching the head with a file will easily remove a couple thousands from the head dia. Then simply cut a new rebated head with extractor groove.