hey guys im just getting into the larger caliber longrange game so please excuse the dumb questions. Anyways im lookin at buying a used remington sendero that supposibly has 260 rounds down the barrel. It has a muzzle break which i will be taking off so i can still make the pull up and shoot shots that are needed around here on occasion without blowing out my ears. My questions are 1 what is a questimate of round count before the barrel goes to hell? 2 where would i get a threaded cap that would match the contour of the sendero? and 3 what is a reasonable price for this gun? its in good shape has the break, a trigger, and a nightforce 20moa base installed. thanks for any help guys/gals