If you've heard the term mad as a hatter, this comes from the hat making trade where people were in contact with chemicals containing lead everyday they went to work, eventually going mad.

It's all cumulative.

I personally don't worry about handling lead pellets. I do wash my hands before eating. Although I do recall down the range when mince pies were being handed out not actually washing my hands first.

It is said lead makes your hair fall out but I don't believe it.