Like I've said in earlier posts, dont matter how good your rail or rings are machined if the action your putting it on isn't true it doesnt matter and the big majority of factory actions arent.
Lay a one piece rail on top and screw 1 end down first most of the time there is air space under the other end so when you screw it down now you have a banana shape.
Bed the 1 end of the rail if there is and rings and no more problems no matter what rings you use.
Lay a one piece rail on top and screw 1 end down first most of the time there is air space under the other end so when you screw it down now you have a banana shape.
Bed the 1 end of the rail if there is and rings and no more problems no matter what rings you use.