Probably not that unusual.
https://en.wikipedia.org/wiki/Lyudmila_Pavlichenko
A friend has one, the rounds are around $5.00 a piece. He has a photo of his wife shooting it and you can see the dust rising around her.
Hubbys boom stick blew my hair back. Funniest thing I ever experienced shootin. In the army I shot rh. I am truly cross dom left eyed right hander, so I was experimenting that day by trying to get my left eye lined up in his scope.
I quit and went straight iron sights.