I believe the OP is after 308 Norma Magnum ammo? that'll be a tough one, maybe gun shows, in the obsolete/obscure cartridges? would a 300WM reamer clean out the 308 NM chamber? have you searched custom reloading shops? there is one here in saskatchewan, Last Mountain Reloading, i believe he could load you a factory spec round, or as custom as you'd like to get?? do you reload? 300WM or 338WM can be formed to work for that. i was fortunate, the rifle i bought had dies and brass, and i reload, so i'm good for awhile, till i have to start forming WM brass. good luck in your search, hope some of my suggestions helped, dogger