Anyone want to give me an "official" reason why the 7x57 can, or can not, be loaded to fit properly between the -08 and .280/.284?
Not official, but of course it can be and easily is, you just get beyond SAAMI pressures. The -08 goes faster than the x57 because it is loaded hotter, not because it is more efficient.
(10 pages, minimum)
Edited to add: Dang, MD beat me by 43 seconds and of course said it better.