Beretta 92 Wilson improved trigger return spring

I believe the Wilson trigger return spring I bought is just a slightly beefier version than the old Beretta stock trigger return spring.  From the fact that nobody seems to complain about the Beretta spring any more, Beretta has improved their trigger return spring.  

The trigger return unit made by Wolff for a bunch of vendors makes disassembly so much easier.  I do not notice the grittiness that you and others mention.  

Make sure you play with a variety of hammer/main springs.  I have only worked with the Berettas that your pistol is a near-perfect copy of, but with the Langdon bar and other parts, I can get all primers to ignite with springs down to 12 pound.  Double action pulls are under 7 pounds.  One of my Berettas with the full Langdon treatment also has the NP3 plating, and that does not improve things much further.