Took your advise and added some grease on the rails, thanks. Here is the results of my first range session. Put about 120 rounds through it. Started with the win white box. Read about how they don't work well after I came back from the range. I had some type of failure with every mag I put the white box ammo in. About 60 rounds. FTE, FTF the works. The first few mags of the PMC worked fine. I had few failure with the PMC. By the time I got to the last few mags wasn't happy. To bad I like the gun. By the end, the gun was so dirty that might have been the issue wi the last few mags. Upon disassembly there is a large scoring on the upper portion of the slide inside in front of the ejection port. Is that normal? It now seems harder to pull the slide open all the way too. The guy in the store sold me some magtech. $17. I will try that next and also pick up some federal. All the ammo is 115 grain FMJ. I like the gun I really want it to be reliable enough to carry.
Some light marking/wear on the slide is normal, and should not be a cause for worry. Only if you see some serious "denting" of the slide face where the front of the barrel locks into the slide is there any reason to be watchful.
As for the difficulty in retracting the slide towards the end of your session, this could well be due to simply the pistol becoming somewhat gummed up from powder residues, etc, as well as the grease becoming contaminated with residues. 120 rounds in a PF-9 is lot for one session, and this pistol does not like to operate dirty. Best bet, if you are going to go more than 50 rounds or so, is to stop and do a minor clean up of the pistol. Especially clean out around the extractor, as this gets dirty and clogged quickly. Also, wipe down and reapply a light bit of grease on the rails every 50 rounds or so. One other thing, if the inside of the slide in front of the slide port is rubbing a bit, this area should also be lightly greased each time as the barrel hood does ride this slide area during recoil. For a good guide on how/where to lubricate the PF-9 , check out GoldenLoki's web site. He provides some excellent lube guidance.
Jim R