The.300 Win Mag and .308 Norma have almost identical performance, having almost identical case capacity. The .308 Norma is preferred by some very knowledgeable shooters for it's longer neck.
Wayne Van Zwoll literally wrote the book on Modern Sporting Rifle Cartridges. After writing about every cartridge imaginable in the book he listed his favorite five.
The .308 Norma was one of those five. That speaks very highly for the cartridge.
Thanks for the information. I had an acquaintance who was an avid shooter. One day, he got started on bullet performance with a bunch of technical ballistics stuff that was beyond my understanding. Realizing my confusion, he bottom-lined it and said because of all that technical stuff, the .308 bullet is incredibly stable in flight which is why it is so accurate and so loved by competitive shooters.
His gun of choice was a .308 magnum. He said he would use it on any game animal in North American, although he said if things got nasty in a close and personal situation with a brown bear or polar bear, he would prefer a .375 or bigger.