I am going to build a new deer rifle and was wondering what caliber u guys and galls would choose? It will be used on deer at ranges from 100 yards to 600 yards. I am debating on a 270WSM, 280 Ackley Improved or 7mm Mag. Our deer range in size of 80 pound does to 200 pound bucks. So I probably be shooting a 140 grain Bergers. I plan on getting a savage action and putting a custom barrel and stock on it. I reload so I want a flat accurate shooter.