i would have to recommend the 30-06. it's a great cartridge and i don't know too many people who would say there's a cartridge more versatile than it. furthermore you can go just about anywhere in the world and you will be able to find ammo for it. i use an 06 and i love it. i'm especially interesested in trying out the hornady light mag ammo. it's supposed to be comparable to the 300 Weatherby mag.