http://materials.nrahq.org/go/produc...tid=EQ%2009525
There are many different types of competition. It can be confusing deciding which is the one for you. The Winchester qualification course lists a number of games you can try on your own. It lists the rules, equipment and courses of fire. You probably have enough equipment already to see if any of these are of interest to you. If you find one you like then look locally for a club or group. It's also a great way to improve marksmanship skills.