Building a new rifle, baised on the CZ Magnum action (.532 bolt face) and a 30" .308 barrel. Usage will be longer range hunting than my 30-06 is capable of handling. Looking for chambering suggestions (but I won't consider anything with Weatherby in the name, long story). I'm considering things like the 300H&H AI (40*) or PI (30*), and the 300AMU. Any other suggestions or recogmendations?