So I'm asking this question for a buddy and all advice is welcome. He bought his wife a new Winchester and called up a respected manufacturer of rings and mounts, told em what he had and asked for a 20 moa rail for it They send him a rail and he sets it on the receiver and notices it rocks on the reciever really bad. Calls the manufacturer and lets them know something is wrong with the rail. So they send another one and same problem. So he went to the local sporting good store and tried the rail on 8 diffent rifles of the same model and the rail doesn't fit any of em correctly. Attatched are two pictures he sent me obviously showing the problem. Top picture is with the rail torqued down and bottom is with only rear screws torqued. He is waiting on another brand of rail to try but he was asking me suggestions in case the next rail has the same issues. I told him he may have to bed the rail which I have never done or have a gunsmith machine the rail to match the receiver. So give me some suggestions if you could thanks. Forgot to say it is a Winchester XPR.