ORIGINAL: lemoyne

Old/New, a lot depends on what you wish to accomplish, from reading your first post I got the impression that you did not have a problem and just wanted to a better polish than the new barrel comes with. If you have burrs or tool marks to contend with then I would start with JB and clean it up,now thats as far as most go, I personally load very tight and try for extreme accuracy so I want a mirror finish. I have no arguement with anybody on this because in the end it boils down to what a person wants to end up with. I do feel if you need to remove some metal as in tool marks or burrs JB is best, I also feel that where it leaves off is where the jewlers rouge starts.
Lee