I don't think the Beretta 92 will ever be a Bullseye gun.
I had an action job done on my 92FS Custom Carry. The smith took all the creep out of the SA pull and got a clean 2-1/2 to 3 lb break. Installed a Millet adjustable rear sight designed to work with the factory front. These changes definately made for a better shooting more accurate pistol.
Also worked on handloads. Found the Custom Carry likes 124 grain bullets best. Have had best accuracy results with moderate loads of PowerPistol.
Take Care
While the standard Beretta 92/96 series is not a match grade gun, it is usually quite accurate right out of the box. More than acceptable combat accuracy. Slick the trigger up a little and you should be dialed in.
Joe. A while back, Jensen's had a sign up where they would do something to Beretas and Taurus's to make them shoot tighter. Something about a weld on the end of the barrel and turning it down so that it acts as if the gun had a bushing. You might want to check that out.
Paul B.
David Sams http://pages.prodigy.net/rmrsdes78/page3.html
got credit in a Performance Shooter article for being the AMTU 'smith who figured out how to accurize the M9. There are shooters using it for Service Pistol at Camp Perry.
But that is all I know about him, have not seen or shot a gun he worked on.