During the mid 1970’s South Africa did some developments regarding smaller caliber ammunition. A lot of these experiments were based on the 7.62×39 case. This project involved the case being necked down to 6mm. Cases used were by Russian Factory 270 which is the Lugansk factory that used to be part of the old USSR, but which is situated in the Eastern Ukraine. Two date codes are found on these experimental lots, namely the cyrillic letters Г and Д, which represents 1952 and 1953 respectively.