Hello All, I am new to this site and my question may have already been answered, but I can't find it. My SD40 does not like PMC 180gr ammo. It will load and fire absolutely wonderfully, then the slide will not go completely forward and seat the round. A sharp tap on the rear of the slide usually feeds the round. New gun, only about 200 rounds thru it. Yes, it was thoroughly cleaned and lightly oiled before first range time. It will feed 165gr HP just fine, not a single FTF. My stupid question is: would polishing the inside of the slide rails with something like Flitz polishing crème be a sensible solution?