One of the nice things about the Norma is that it is basically the 338 Winchester bored out 20 thousandths, and it uses a lot of bullets which match the 338 in weight. Consequently, since data is often pretty thin for the Norma, one can use the data for the 338 with equal weight (and perhaps even equal sectional density) bullets. Then you can up the charge until you equal the velocity of the 338 loads. (You should actually be able to safely exceed it as well with the same powders.)
