We will probably buy new in one of the entry level bolt rifles. With seasons over here this year we are biding our time with an eye out for a bargain. If the right deal comes along, new or used, a .243 or .308 would do. This will be primarily for blacktail deer in the wet jungle, but elk and black bear are on the local menu.
As much as I like to geek out on BC, recoil, etc., for the uses stated I would be fine with any of your choices (.243, 6.5 Creedmoor. 7mm-08, .308).
I'm not a big .308 fan per se, but we have TONS of factory ammo locally for that cartridge. Way more selection than the others, including 6.5 Creedmoor. Not sure if factory ammo matters to you though.
