It appears that the ECM rifling, which was started in 1995, may increase leading.
I don't reload as of yet but hope to very soon, as witnessed in another thread over in reloading.
For now I think I will get some of the 'plugs' 2hawk recommended and polish the barrel once I get the lead removed.

roadgunner,
Hotlapping looks interesting and maybe along the lines of polishing the bore but with obvious differences.

pinkymingeo and 2hawk,
It looks like you both have luck with similar processes when removing lead. I will start with Chore Boy as it is softer and move to the frontier product if needed.

Thanks for the input everyone.