Didn't get over zealous lapping the rings did you ?
oneoldsap may be onto something as the slightest scope movement could do what you describe. If the scope does not move fore-aft I'd be tempted to change rings an try it.
Double check scope mounting and action screws.
Assume bbl crown has been carefully inspected?
"Outlaw guns and only outlaws will have guns!" Unfortunately, we may be moving in that direction.
NRA Benefactor, Conservative!, VN '64-'65.
Never sell a gun or a car ... and retire rich!