Use as directed it will get that pistol or rifle bore clean and bright. For heavy lead deposits, first use a tight patch with pure gum turpintine. That will grab and pull lead from a badly leaded bore. Gun cloth will finish the job and leave a bright polished bore. It is an extremely mild abresive that removes a couple molecules of metal...that is why the patch gets black after running it through the bore. Don't over do it...couple of passes through the bore gets the job done.
Pros: Does the Job
Cons: None
This review was written in the old system and had content requirements that are different than reviews written today.