A very interesting discussion.
Years ago (35?) BASC used to train would be shooting instructors to see the shot swarm in flight , it can be best described as being like perncil graphite shading in the sky.
Nowadays Instructor tuition seems to major on political correctness , health and safety , care in the community, and caring for environmental issues such as noise and lead pollution.
It is how the times are changing , when I was a kid , a cut or graze was repaired by sucking it , licking it or rubbing it , nowadays it is off to A&E and quarantine.