This is the rail thats too tight on the rifle?
In my mind you have 4 parts working together:
-the threaded holes in the reciever of your rifle
-the rail that mounts to those holes
-the QD angle "arm" that sets POSP scopes apart
-the scope-ring interaction. Some PSOP scopes are attached to the arm, but others have made 1" rings in there haven't they?
Where is the problem occuring?