no theres not a lot of leading. Depending on the powder i shoot, i use birchwood casey 2 in 1 bore scrubber to clean the lead/copper fouling out. If i use pyrodex, t7 or american pioneer i clean with water and dry, follow up with the bore scrubber and let it do its job.

I normally do jb bore my barrels now and depending on what they look like when they arrive i can do as many as 200 strokes to smooth one out. The great plains rifle i built for someone got 200 strokes to take out the sharp rifling those italian rifles come with.