A bullet which has a copper gas Examine or copper plating is most effective for INDOOR ranges to help keep lead vapors out in the air. My Good friend the Retired Irish Big alerted me on the deal on 9mm bullets. Alas, they had been .355 and I prefer .356. https://reidvgraj.blogolenta.com/34065985/100-grain-9mm-bullets-for-reloading-an-overview