I'm looking for some advice on a new rifle purchase. I'm interested in buying a new rifle for whitetail hunting in Wisconsin. I've been using a Remington model 870 .270 winchester the past four years. I like the pump action, but would love a semi auto. I have been hunting in central wisconsin where the terrain is mixed forest and open fields. I want something that can punch through the thickets but has as flat a trajectory as possible. I don't feel comfortable shooting beyond 250 yards. I also want less recoil than the .270 has. I'm thinking either a .243, .25-06, or .257 Roberts. Any comments?