I recently came into a Marlin MR7 in .270 the owner could never get it to group and we did some trading. The rifle is mostly a Winchester 70 with a Remington style barrel and a Ruger bolt handle. As I have no interest in .270 I decided to build it in 30-06. After tearing it apart I quickly realized why it would not group, only one bolt lug had contact, the receiver face was out by .020 etc... I fully blue printed the action including recutting the threads, lugs, receiver face and bolt lugs all true. I machined a new 27" Douglas XX barrel 1:11 twist (.336 neck and .750 throat) and set head space. I cut muzzle threads and added a Trinity brake. I Cerakoted the barrel and inleted the stock for the larger barrel. I glassed in the action, free floated it and finally performed a nice trigger job. I removed the aluminum scope bases (crap) and ordered a new steel rail and scope. Turned out very nice and traditional looking. Should be a good meat gun!