I purchased a S&W Model 31-1 off the internet and have discovered that 5 of the 6 chambers have burrs. Fired brass is very difficult to extract and comes out with a rather nasty gouge. Fired cases will freely come out about 1/4" and then will not budge without me forcefully rapping on the ejector rod, which I hate to do. I have asked around and can find no revolver smith in my area. What do you recommend I do? Thanks.