I took my father's 1903 Springfield WWII sniper rifle reproduction to the range in order to do a video for my channel. I wanted to do a video commemorating the USMC birthday, and Veteran's Day weekend. My father was a jarhead, I was a squid, and my grandfather was an Army tanker.
I thoroughly cleaned the rifle and worked the action. Occasionally, I noticed the striker bolt wasn't held back when I closed the bolt. Had I known anything about these rifles, that would have told me that I had a sear that was not right and the rifle could discharge unintentionally.
But I was ignorant and thought maybe this odd action required a live round in it to work properly. It was my father's rifle that he competed in matches with. Surely it was in safe working order.
Nope.
At least I felt it wasn't quite right and made sure it was pointed downrange and secured, and I was wearing ear protection before I put live ammo in it.
The actual discharge is at 4:43 if you want to skip all of the nonsense rambling...