At the risk of making you yawn, might I suggest the .30/.338 Winchester. Practically identical with the .308 Norma and brass readily available as is loading equipment. Norma brass can be quite expensive in addition to being rather soft and low on reloading life. I have a Ruger 77 which I had rebored and rechambered from 7mm Remington Magnum to .358 Norma Magnum, and all my brass has been reformed 7mm Remington Magnum.