Alright, so I've been hunting for years now, mostly a shotgun hunter. I'm hunting an area that is new to me which may require 300+ yard shots. As a result, I'm looking for a bolt-action rifle to do the job. I'm in college right now, so obviously cost is a huge factor. I was looking at the Marlin Xl7, but I don't know which caliber I should go with for such ranges. I was thinking about going simple with 30-06 or .270, but a friend recommended the 7mm-08. What do you guys think?