I had a 1916 built 1892 in 38-40 with a chamber like that. Blew the shouders right out of the brass into a nearly straight case. My brass life was pretty short, the necks liked to split after a couple resizings squeezing them down that much.
The rifle had a pretty rough bore and wasn't much of a shooter anyway, so I parted with it and saved myself the headaches.
