Another option for the semiauto rifle with a bit of "black rifle" flair is the Winchester SX-AR (FN FN-AR clone) in .308win. Heavy barrel, camo coat, all the knock down power of a .308win, in a very manageable platform. A work colleague of mine used one this summer on our many prairie dog trips together, performed flawlessly from 60-400yrds on p-dogs even with cheap russian steel cased JHP's. Remarkably, recoil was manageable enough to keep the dogs in the scope for quick follow up shots.