TL, when you check the function, be sure that when the trigger is fully pulled back, as at the instant of firing, that the crane is still tight to the frame. The first Colts DA Army revolvers rotated the cylinder counter clockwise, and therefore the hand is trying to push the cylinder away from the frame, and any slight looseness in the cylinder latch area will let it fire with the cylinder misaligned to the barrel. The one I have has this problem, the cylinder seems to lock up "like a bank vault", but it's misaligned and spits lots of lead out the left side. Of course, I discovered this after replacing the barrel, because of the cracked forcing cone-most likely caused by the misalignment.