Mine has smoothed out but has not totally gotten rid of that 'crunchy hint' partway toward the rear. I think its inherent, the striker indicator spring is in that plastic housing and I think that might be culprit. I took it out, and had a q-tip with a hint of CLP on it and gave it a few plunges down there inside the striker indicator plastic housing to make sure it was free from any thing. Poked a dry q-tip down there to get it all nice and dry, reasembled and knew it was the best I could get it. If that is in fact the source of the sound...I dont see how it can fundamentally get rid of the gritty sound if you have it. Mine has subsided but has never totally gone away..it seems inherent with the compression of the spring that likely rubs against the plastic inner when it bunches during compression (all guessing here, take my assumptions lightly)
Gotta say, with how 'pedestrian' the PPS trigger feels to me, the darn gun is hella-accurate. It seems to be quite sweet despite the ho-hum trigger. And the 'ho-hum' trigger does predictably exactly what its supposed to everytime. It's 'unremarkable-ness' works quite well.