If working with lead, proper procedures allowed, I should'v been dead, toes up, years ago!! I don't know how many lead projectiles I have cast in years past, in both 45ACP 357mag 38specail[same diameter] and other calibres.
ALLways wore gloves and use to good fans to keep the fumes from the pots flowing away from my breathing.
Take a chance in life, Columbus did!!!

With all Sincerety and good humor, tinkersd