The Walther PP series has a heavy DA pull and that's due to the design limitations of getting all those features in such a small package.
It all comes down to the available leverage of the design, and there's not much that can be done to lighten it.
Attempts to install lighter springs often cause ignition problems and as above, can cause battering or cracking of the frame.
Most PP series owners just accept the heavy DA pull as the price of owning a classic design, and get used to it.
After a while you no just longer notice the heavy pull.
You can be surprised when you let someone else shoot your Walther and see them struggling with the trigger and checking to see if the safety is on.
You've grown so use to it you no longer notice how heavy it is.
Your best option is to just shoot the gun until you become used to it, then let an unsuspecting friend try it out while you snicker behind him as his hand trembles as he pulls and pulls.
