In his 1938 book, "Fast and Fancy Revolver Shooting", Ed McGivern makes reference to a K-22 with 200,000 plus rounds through it. Shown are photos of machine rest groups @ 20 yards before and after factory "adjustment" (new cylinder stop). All groups are one-holers, and virtually the same size.
Ed was a meticulous sort of fellow; I'd tend to take his word for it.
Ed was a meticulous sort of fellow; I'd tend to take his word for it.