I knew a shooting instructor years ago that never picked up any ammo if he dropped it on the ground. He told anyone that came through his class the same,
"Don't pick up that ammo & use it, it's contaminated & dirty now that its been on the ground & will scratch your barrel."
Maybe these folks had that same instructor.
"Don't pick up that ammo & use it, it's contaminated & dirty now that its been on the ground & will scratch your barrel."
Maybe these folks had that same instructor.