Truth is most of these guns fresh from the factory with no tweaking have far more accuracy potential than will ever be realize by their owners, me included. A good pistol shot can take advantage of any available accuracy , the tuned guns make it easier for him to do so.damn thats some good shootin
The tuning makes them more manageable and easier to extract and experience the accuracy potential available in the arm.
The stuff we gun mechanics do to them does enhance accuracy to some degree but if the potential is not their to begin with the gun will never be really accurate.
A very good and old friend of mine relates an event he witnessed as a young shooter at a pistol range in Texas many years ago.
A new pistol shooter had just purchased a revolver in cartridge persuasion and was having trouble hitting anything with it and proclaimed the gun inaccurate. An old timer asked if he could have a go at it with the new pistol and the owner obliged. He set out a Shlitz beer can on a nail in a post with a red globe on it about the size of a 50 cent piece my friend said, at about twenty five yards and proceeded to empty six rounds through the red globe on the can in one ragged hole. He hands the gun back to the owner who was awe struck and said "Son , ain't nothing wrong with your gun" and walked away! Later it was learned the shooter was a member of the 2600 club which is comprised of the best target shots in the country. True Story !