I'm with Pacman I do believe your 25-08 is the 25 Souper. In Wayne Van Zwoll's book Deer Rifles and cartridges he goes in detail on one he built with some handloading data. If you google 25 Souper you can get some info. Depending upon what action your using you maybe better off with a 257 Roberts AI but again there is nothing wrong with being a bit different..Good luck with the build.
