The only "accurizing" I've seen that produced undisputed improvement is the "fitting required" aftermarket barrels. "Drop ins" are no better than good factory barrels, and various trigger jobs, sights and accessories may make the gun easier to shoot, but don't change the mechanical accuracy.
Basically, it isn't a 1" bullseye gun, but is eminently suited to action pistol games and defense use.

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Science plus Art