As to lead - well - "Lead Away Patches", I think they were/are still called. I don't know the distributor - maybe Kleen Bore, or Birchwood Casey's - maybe also still available in a sheet of impregnated cloth - I still have some.

Have a leaded bore that solvents and brushes can't dislodge? A single "Lead Away Patch" shoved through the bore, and the lead comes out the muzzle on the patch in slivers and chunks - drop them of the cloth right back into the melting pot - yeah - kinda scary. Makes you wonder what it is?