Re: new guy
First thing is take it to someone who knows what they are doing. If someone sold you the rings, they didn't know. A close look should solve the problem. Something is not right and you don't know where to start. The advice to shim will do you no good if you are flying blind. Too much chance of screwing up. If you know someone knowledgeable, (not a blowhard), take it to them. If not, a GOOD gunshop or smith is in order.
I think, therefore I am, conservative.
Kids are great, beer is good, and people are stupid.