Almost all rifle (and quality handgun) ammo are copper jacketed, meaning no lead vaporisation until it hits the backstop. I use solid brass ammo on one of my l

Almost all rifle (and quality handgun) ammo are copper jacketed, meaning no lead vaporisation until it hits the backstop. I use solid brass ammo on one of my larger caliber rifles, but not the others. Guns can be very finicky about their bullets, and not all like solid brass ammo which results in weird accuracy issues.