Not as big a worry as they say...
I'm new to this forum but not new to shooting & lead. I work in electronics, I solder at work and solder at home and have done so for over 40 years. I have been shooting since I was six or so. For the past 40 years I've been heavy into air guns and handle pure lead pellets all the time, shoot almost daily. I get tested once a year for lead exposure, and my highest result ever was 2, and below 40 is ok, they say. I wash my hands and don't eat the stuff, but I don't worry about it either. I plan to use an exhaust fan when casting. I have molds, etc. on the way, and have this most excellent forum to learn from. Life is good.