Okay, I bought an unfired custom 6.5 Creedmoor for my grandson's birthday. The original owner sold it to me unfired, with no scope mounted. Build was on a 700 SA (supposedly blueprinted), nicely bedded in McM stock. 2B Bart, chamber, lands to muzzle all look great. On to the problem, I'm lucky to get it to beat 3-4 moa @ 100 yds. I gone thru all the normal checks on screws, bases, scopes, adjusted action screw torque, 120-140 pills with H-4350, Varget, rl-16. No change to groups. No brake, so no deflection. A stripped bolt will not fall without thumb pressure. With a new case, it takes more pressure, dragging all the way. I think I've finally found the problem. "The bolt cone is hitting the barrel" and "the recoil lug is contacting the rear of lug recess equally, as it should, but is also contacting on front of bolt lugs". My question is can I stone the face and rim of the cone to clear it and the front of both front lug faces enough to halt contact? Or do I have a larger problem with action/ barrel concentricity? I was planning on marking up the bolt and going slow with honing it, until I have clearance with a chambered case. But, before I start, I want to hear opinions from the "brain trust".