Thank you Rolf and Daryl for the input! At this point I will do the 308 Norma project and try and see how it go?? I tested the doner rifle mag box and lenght and it will work fine with longer bullets in the 220gr range! Even the monolitics.
Then I will go with the 358 project...
I manage to get this on the internet:
https://www.handloadermagazine.com/the-heavyweight-358-norma