What does recently obtaining your Concealed Carry Permit have to do with washing your hands, or going to the airport.
The analysis of gunshot residue from the hands of a shooter detects primarily trace amounts of primer residue. The major primer elements are lead, barium, or antimony . Usually, all three are present, so it's a good practice to wash your hands after shooting or at least before eating, (and don't lick your fingers while at the range). In addition, unless you shoot full metal jacket bullets, your hands will come into contact with lead.