Forrest r,
"That or use a tight patch with jb bore paste and polish the rough area of the leade in the throat.
https://www.bing.com/aclk?ld=e80csy8...e7d999ccc239d9
A bbl throat that has rough spots is never a good thing for any cast or cast/coated bullet.
Do a search of lead rings on this website. There has been several threads about what causes it and what to do to stop them."
Good points. I'll look into those two ideas soon. Your Photo shows the PC stayed on the surface exceptionally well. That is what I am working for. Tried some plain base boolits last night with much success, at slower velocities, yet still there were signs of the PC being rubbed off, especially on the lands of the rifling. Whereas your examples have the paint on all areas of the shank. Well done.