anyone know? S&W sport 556- I get brass residue and a brush works okbut a Dremmel grinder, just the attachment- used by hand- in the rite diameter might be better- a little Hoppes #9 and the rite touch? Im not going to the range this week so I thought Id ask

thanx much

Just use a bit of bore solvent on a rag to remove the residue. I've never had any that I couldn't clean with just solvent.

thanx scott-