Brandt, p.379 lists a .320 Garrucha that was loaded by CBC in Brazil with a CBC headstamp as can be seen on the headstamp listing for the 320 SHORT CF. According to Wikipedia, a Garrucha was a small rifled or smoothbore pistol, like a derringer, which was common in Brazil and Argentina in the early 20th century. It was loaded for the 320 Short CF as well as the 380 Short CF, both of which were popular calibres in Brazil during the early 20th century. The argument therefore is that is not a different caliber, but rather just the name of a pistol loaded for the 320 Short CF. (Brandt Ref 336A)
