Re: New Rem XCR = 7" to 0.8" groups???
Sounds to me like this is possibly a concentricity issue with the Trophy Bonded bullet involved. Never worked with them, but this is normally what we se when the jackets are not concentric. I used to see this commonly with the GameKing 150 FMJBTs, since those were frequently ones that had such issues. Obviously, with the results you got from the CoreLokt bullets, the rifle isn't the problem.