Remington 5R in .308 to start and Bushnell makes a decent FFP(First Focal plane) Mil/Mil scope. Set that rig up the way you like and shoot,shoot,shoot to make sure that's the game you want to get into. Long range shooting is very addicting especially out to 1K yards.
Or go big and get Accuracy International AW or new AX top it with a Schmidt and Bender scope and dont look back!
Buy once Cry once but it will last you forever