I am looking to get a custom built rifle. I live in Pennsylvania, so I want a rifle that I can use to hunt the woods of PA and use to go out west and hunt Elk, mule deer, and pronghorn eventually as well. I figured it would be better to have one nice custom rifle that I shoot all the time and get comfortable with instead of a bunch of factory rifles with different calibers for different things. I am having trouble on deciding what caliber to go with. I want to be able to reach out and touch an elk at 800 yards or less. I am thinking 7mm Rem Mag, 300 WSM, or 270 WSM. I like the ability to go to any store and pick up ammo if I need to. I have reloading equipment, but just like factory ammo as a backup. Are the custom actions worth the money or should I just stick with a factory Rem 700 action and have work done to it?