“we had a Copperhead go unobserved.b
I’m embarassed to say that my gunner once forgot to change his index from HEAT to Sabot on a Table VII engagement. It looked like we were aiming for the moon...and everyone at the range knew exactly what we had done.
Happened at Knox, once upon a time, Steeles Tank Gunnery range, as I recall. The Survey Board eventually figured out where the round had impacted, something like 14 miles away. I think they'd waited a couple of days for the phone to ring hoping to hear that they'd hit some farmer's unoccupied truck...and dreading getting a call that they'd hit something with a formerly live human in it.
I also recall a night gunnery shoot with the TC's .50 in which a newly-minted TC was looking for the target light in his NOD, found it, opened up, and failed to shoot down the moon. Loader, gimme a SABOT....