It is a great pump gun. As far as use for competition, I'd bet the most use it gets in competition is probably 3-gun Heavy division. For skeet/trap/sporting clays, pumps aren't really the mainstream.
Don't let that get you down, it's a great all around gun, and you can still compete just fine if you have good fundamentals and practice. Most times you'll find that practice and skill will trump equipment. It's that last 10% where having the right equipment for the job can really help.