I've had a new Ruger 7mm mag bolt rifle sitting in my safe for a couple years now. I bought a 12x Leupold scope for it with the intentions of long distance hunting with it. I have tried using weaver high scope rings and now leupold rings, and neither set will tighten down on the front part of the receiver... is my receiver "bad?" Anyone else have this problem? The rifle was manufactured in about '07-09. Thanks to all who respond, I will take pics of the whole mess later.