What in heavens name are you spooked about. I just did a quick skim over this thread and most "granted not all" state that they have low numbers, even after casting, reloading, and shooting lead bullets for years even decades. Lead in the form of a bullet or in metal form is almost imposible to be absorbed into the body by an adult. Remember many people used to carry a lead ball or bullet in their body for the rest of their life before modern surgery. If you have young children in your home as in pre-teen then some extra precautions would be in order.
Shooting in an indoor range also exposes one to lead "compounds" from the primers, and also some lead vapor from the bullet base. Compounds here is the key word, some of these can be absorbed into the body.
If you are REALLY concerned get your blood tested every so often, there ways to remove the lead from the body, its not the end of the world. My blood is tested 5 times a year and my lead levels are extremally low "sgl. didgets". My testing is done for reasons other that shooting or casting, but I still have the lead levels ran.
In the final analysis, enjoy your sport, use common sense and wash your hands, don't pick your nose, if you smoke you have bigger problems than lead to worry about. Be somewhat careful around the tumbler as this also has the primer residue in it and in the dust. But again use common sense, just keep the lid on when its running and don't toss the media around when seperating the brass.
Best of luck and stay off the highway, you're in more danger there with everybody on their cell phones and texing.