I have been casting now for 8 months and just had a lead test done and its 17. I shoot at an indoor range with very little ventilation once a week for an hour or two but occasionally I am there all day.
I cast and tumble in a shed (but don’t tumble while I am in there) so will move these jobs outside and do all media separation outside from now on.
I wash my hands whenever I handle lead, cases etc, don’t eat and wash clothing after casting so that shouldn't be an issue.
I reload on a bench in the house used primers go into a tube on the press but I have been cleaning the primer pockets onto a sheet of paper. Will do that outside from now on only clean brass in the house.
Will report back next blood test in a few months see if the above steps help.