Are your rings high-mount, low-mount, medium?
High mount rings may have been bent somehow but it would take a lot to bend them. I would suggest trying a different set of rings if you have extras. It's pretty hard to mismount a weaver base. Is the base correct for the rifle; sounds silly but most are not interchangeable.
Are your bullets straight?
(that's a joke)
__________________ If ya don't know where I've been and ya don't know where I'm going, your opinions of me don't count.