Hopefully you will read this before you reply:
The background is this, I often see a very small amount of lead in my bbl after an extended shooting session. It is not uncommon for me to shoot 2-300 rounds. The lead amounts are small, and readily removed with a Lewis Lead Remover. This is the case with either a polygonal bbl like my stock Glock bbls, or with an aftermarket Ballard rifled bbl for the same guns.
So, with that in mind, which would you think best describes "normal"?