The one I took apart had 30+ years of copper and carbon build up in the barrel. I chucked it up in a vice and cleaned it for two days. The owner and I shot it yesterday. Surprisingly it would keep a 3/4" group at 50yds and 1.5" at 100yds. He's happy as a lark. So I would probably say, no, they don't get cleaned properly.
Thanks, Dinny
