That is amazing - I wonder if modern digital cameras have a new way of minimizing the optical flaw known as "barrel distortion" (which has nothing to do with gun barrels!) at close range? In the old days, with SLR cameras, a distinct curvature would be visible. I based my comment on proportions. Yours appears, from the photo, to be of very nearly equal length from front of magazine to band as from band to muzzle, which would mean it was way short. I presume you made the 21.5" measurement in the bore from face of closed bolt? The photo is really a puzzle! Enjoyed the chat.