I thought Morten answered this question below:
Some additional info on “RANO”:
RANO stands for “Rifle Association of NOrway” (ref. Reuter : poss also mentioned as being “RAufoss+NOrma”). It was the tradename used by the sales organisation formed by Raufoss Ammunition factory and Norma (the Norwegian Norma, located in Oslo, Norway), for production and sale of ammunition to the Norwegian shooting movement. RANO was formed in 1965 and was shut down in 1989, when Raufoss again took over both sale and production.
RANO hs are known on 308 Win and 6.5x55. It is believed that most, if not all, case production was done at Raufoss. Loading may have been done both at Raufoss and at Norma, Oslo. Used a “RN” primer to indicate RANO loadings.
The cases had the hs of “RANO” at 12oclock and production seems to have used two different hs styles:
c1964-1969 : Uses three digit code close together at 6o’clock eg “RANO 2A7”.
c1969-c1989 : Uses three digit code so that the three codes were located at 9, 6 & 3 o’clock. Eg “RANO 2 C 4” : Format is believed (Morten S - IAA forum) to mean:
The “2” (9 o’clock) is a code related to the case metal and/or the case design. The “C” (6 o’clock) identifies the production run.
The “4” (3 o’clock) identifies the lot number within the production run.
The earlier code may well have used the same code. However, at present the exact meaning of each code is not known.
Whilst similar in style to the post WW2 Norma hs code for 6.5x55, the exact meaning appear different.