Rugers are great rifles and I like the No.1's. But finding the right rings can be a costly PITA. My smith/friend has three or four and he has had the same problems as the rest of us finding rings that work correctly. He had to use extended rings to get correct eye relief also.
I have heard, and please don't shoot the messenger, that If you contact Ruger, they will trade rings with you for free. Just something I was told, don't know it to be true or not.