Double action revolvers with very heavy recoil can "double tap" because the shooter pulls the trigger a second time while the gun is recoiling. There are slow-motion videos online of this happening with 500 S&W's where you can see the shooter pulling the trigger involuntarily as they struggle to maintain control of the gun. That likely is what happened in the video posted above, as you can see the second round firing while the gun is in recoil from the first round. This possibility--and the severe safety risk it poses--is one reason I don't encourage novice shooters to shoot heavy loads in double action revolvers. A single action Ruger is the perfect platform for learning to control a heavy recoiling gun.
I have seen very worn Model 29's unlock under recoil causing the cylinder to rotate backward, typically from a very worn or battered bolt.
Last edited by Oregon45; 02/16/19.
