The solution to your "problem" is to not point the barrel up when closing the cylinder. Since the barrel of the revolver must be pointing down to reload it, this shouldn't be a hardship.

The frame extension (called the frame stud) where you have the "silver line" is there to keep the cylinder from falling off the frame. If you keep the barrel pointing downward while you open and close the cylinder, you shouldn't see any further wear there.

__________________
Steve
NJ State Trooper (rtd)