Originally Posted by colasweet
Any long action magnum, and any long action non-mag as long as you change the bolt head to a magnum bolt head.
That assumes you are using a bolt that you can change the "head" on (ie Savage).
Otherwise you have to get a new bolt if going to a non magnum cartridge.
PTG sells new bolts if you want to go that route also.
Basically any other magnum cartridge can normally be used (300 Win, 264 win, 338 Win, etc)