[MGMike]

I think there should be a spring under your trigger bar, look at the schematic on this site:

http://www.e-gunparts.com/productschem.asp?chrMasterModel=2100zPPK

That schematic is misleading. Postwar PP-series pistols do not have a separate trigger bar spring. The trigger bar is held upward by an extended arm of the trigger spring, which is mounted in the trigger.

M

 

[MGMike]

The right hand grip panel sometimes is found slightly bent inward (or flex when when the grip is being squeezed), and bind the trigger bar. Aftermarket grips, particularly Pachmayr, are notorious in this regard.

M

 

[MGMike]

The hammer fall in DA is marginally shorter than in SA, so there is slightly less energy available to fire the cartridge. That said, your misfires could be due to several different things. The fact that it occurs only immediately after a decock might be a clue, but that's when you'd usually fire DA anyhow. Next time at the range try lowering the hammer without using the safety lever and see if the misfires persist. If a thorough cleaning does not cure the problem, take it to a gunsmith who understands Walthers and pay him for his knowledge and skill.

M