Picked up a P220ST from the gun show today, and after getting it home and playing with it a little more, it seems as though there is an issue with the slide to frame fit while the barrel, guide rod and spring are installed.
I took the barrel and guide rod/spring out, and put the slide back onto the frame. There is a slight sitcky spot once the slide is about 1/2" from being fully installed.
With the barrel and guide rod/spring installed, and after attempting to reinstall the slide onto the frame, the sticky spot gets much worse. At about 1" from being fully installed, I literally have to use the base of my palm and a firm smack to get the slide to finish sliding onto the frame.
After installing, and checking for security, the slide will not return to the full-forward point if I ride it forward, sticking about 1/16" back. The sticky spot is not that tight, to where I can use my thumb to push it fully forward. If I pull and release the slide as if chambering a round, it returns to it's full-forward position without needing an extra push.
I pulled the grip panels off and checked for anything binding, and nothing is visually evident. Is there something I should look at to fix this problem?
Serial number is G331xxx, and it has the older style narrow rail. No magazine was in the pistol during these checks.