It might mean something. But you'll have to dismount the slide to find out what.
The PP series pistols have slide/frame rails only at the rear. There are none at the front; the front muzzle bearing of the slide encircling the barrel is what guides the slide and holds it down. Pulling the trigger guard down increases the length of rearward travel that the slide can go before the front muzzle bearing halts it (with the compressed recoil spring sandwiched between) by striking the frame. At that point the slide/frame rails are no longer in sliding contact with each other, and the slide can be lifted up at the rear, high enough to clear the barrel boss, and allowed to run forward off the front of the barrel. If you can't get the slide back that far, the most likely culprit is a reversed recoil spring or an aftermarket "extra-power" recoil spring with more coils or thicker wire that that goes "solid" (fully compressed) too early.
Whether that is true or false depends entirely on the specific ammunition being used. These days there is such a wide variety available that the only way to tell is by function and by comparative "feel".
.), took off the grips, put it in a padded vice, slid a "right sized" socket over the barrel, & while I held the slide as far to the rear as it would go he hit the socket a couple of times. Slide came back far enough to lift & we got it off. The recoil spring was in backwards, as a couple of folks had guessed, & was jammed at the barrel/slide. Worked the spring loose but it's shot. I wonder if it was the crooks or cops who put it in backward ? Pistol has seen some mistreatment for sure.
