Ciao,
i just reduced the diameter of the new first turn but i did not stretch the spring. It works smoothly now. I'm just experiencing frequently the lack of activation of the firing pin, so the trigger do not fire! It looks it take a bit of time to become armed!!
Any suggestion?
Thank again
Rob

Let me see if I'm understanding this correctly...The cartridge sometimes does not fire??? The primer maybe has a small dent but no ignition??? But if you reload it, it will fire???

That would indicate that maybe foreign substance [dirt; grease] in breechblock/firing pin is problem...Or perhaps in linkage from trigger to firing pin (sear is often dirty/dried grease/sticking)...

Hi
The last one, the firing pin does not activate
I'll try to clean as much as possible.
Thk I'll let you know
Rob

Your sear is not resetting. Remove and clean the sear and see if the small plunger at the front is moving freely. In the past, I have taken a dremel with a polishing wheel and have slightly broken the edge of the plunger by polishing. This is the edge which faces out when installed in the pistol. By polishing the outer edge of the plunger, it helps it to ride over the trigger lever and reset properly.

Hi Alan,
what do you mean for sear? I did not find it in the scheme on the technical parts!
sorry
Rob

It is called the trigger bar, or sear bar, or just the sear. It is located on the left side of the luger, and is what releases the firing pin to travel forward.

Exactly. The small bar in the upper receiver, which releases the firing pin when the trigger is pulled. This bar can be removed from the upper receiver by gently prying up and pulling forward the flat spring, which holds it in place. By removing this sear bar, you can clean around and inside it. The small barrel shaped plunger needs to move freely in and out and as I mentioned, by buffing a slight ramp in the top of the plunger on the outside, where it meets the trigger bar, it will help this plunger over ride the "L" shaped trigger bar

Ill do immediately and let you know.
THK
Great Forum!!:cheers: