A bullet having a copper fuel Check out or copper plating is most effective for INDOOR ranges to maintain direct vapors out in the air. I have not applied these because I can not find primers but I've employed Berry's up to now and they are really nice. Made for https://kameronrxklo.webbuzzfeed.com/39448663/the-ultimate-guide-to-hornady-380-bullets-for-reloading