Volunteer dept? They need better training. The auditory feedback (sounds of popcorn) is a pretty good clue. Regardless, ammo in a fire isn't flying around at 1,200-3,000 feet per second. It needs to be packed into the chamber of a gun for that. Neither does chain react from the ammo burning up around it. It may penetrate the plastic/steel ammo can its stored in, but definitely won't be lethal beyond that.