We had some problems with my wife's PPK/S. In our case it was light primer strikes. I called Smith & Wesson, they sent a shipping label and I sent it in. It took a while, and they ended up replacing the slide, but they took care of it at no cost to us. Wonderful customer service.
There are a number of guns that require 200 - 500 rounds to break in, and not going fully into battery is a common symptom. I'd clean it, hand-cycle the slide a bunch of times, and take it back to the range. If the problem persists after a few hundred rounds, call S&W.
"An armed society is a polite society." — Robert A. Heinlein
"After a shooting spree, they always want to take the guns away from the people who didn't do it. I sure as hell wouldn't want to live in a society where the only people allowed guns are the police and the military."
— William S. Burroughs