I'm glad this thread popped up........ Because I recently got a nice, older, Mossberg 500 20 ga. with C-lect choke to serve as my 15 yr. old step grand daughters introduction to busting clay birds. Wanted a 20 ga. because I was concerned about recoil and would have preferred a softer recoiling 20 ga. gas gun but this one came as part of a two gun deal that I couldn't refuse. Before I got a 12 ga. Browning Citori O/U my sporting clays gun was my old 12 ga. High Standard Flite King pump that's the smoothest, fastest pump I ever used. The slide is so effortless you can point the muzzle up 45 degrees, hit the slide release and the slide will fall back to fully open all by itself. I think that effortless pumping is what allows me to stay on target, as George P noted that sometimes shucking a pump action can throw you off. I'm hoping this 20 ga. Mossberg 500 works out well for her. Just as an entry level intro gun and not yet worried about fast doubles. Nice to know others are using them. Once school gets out this summer will be interesting.