Looking at building a rem 700 long action and wanting to choose the biggest or best cartridge in long range energy. I already have a 300rum so im thinking 338? It will be a factory 700 action single shot. Can a 30-06 bolt be opened to a magnum bolt face size? I will be reloading so factory ammo is no concern, but not so sure about custom dies for some wildcat. Thanks for any ideas.