Took apart my Ruger Precision Rimfire today. Cleaned the factory barrel thoroughly and here is what I seen with the bore scope after cleaning. Does anyone else have a bore scope to inspect their barrel? Does it have these circular marks? The marks are 360°. Notice these four photos are taking at different areas. The entire barrel length is like this. I will have to double check but I don't believe my $210 Savage MK II barrel looks like this. This gun has never shot that good. When I was cleaning the barrel I noticed the patch on my Parker/Hale jag was not as tight on any of my other 22 rifles. Anyway, since this thread is about the Ruger PR I thought I would share this. One reason why I am so interested in the Shaw barrel.