I'm relatively new to shooting sports (shot about 5-6 USPSA matches last year). I'd like to try 3-gun, but I'm not sure about what division I'd be shooting in. I have a Glock 23, Colt AR-15 Magpul w/ Weaver Kaspa 1.5-6x scope and an old Savage Model 30 pump shotgun with 28" barrel (I'm the 3rd generation to own this pheasant-slaying shoulder breaker...). I'm not opposed to purchasing a new shotgun to make this happen, as the Savage is a hog to handle and I don't know if I want to tear it up doing competitions because of the sentimental value to me. What division would I shoot in and what would be a good entry-level shotgun to be looking at (pump or semi-auto) on the cheap? Thanks for the help!!