Wash your hands after cleaning or reloading the gun or wear gloves while doing so and don't put your hands near your mouth until you do. Inhaling lead dust and smoke over an extended period is the main reason gun ranges can be a problem, which seems to be could be solved with good ventilation, or failing that literally any face mask or even a rag over your mouth. The elevated lead levels seem to be mostly in employees at gun ranges although people who spend a LOT of time at indoor shooting ranges also have had similar levels. Also like, a lil lead here and there is fine, consistent and chronic exposure is where the trouble comes from. Aldo it can't be absorbed through the skin at all, it's safe to bathe in water from lead pipes. If you do ever need to drink from one run cold water for a good 30 seconds first, it's the water coating the pipes that gets all leaded up while the tap isn't in use so you can flush it out with fresh flowing water and be fine as well. Tbh, you're probably perfectly safe already.