The optimum gun for sporting clays is probably a 12ga gun with an Imp Cyclinder or a Modified choke. The sporting clays fields offer a variety of shots ( crossing like a Skeet target, outgoing like a Trap target, some tower shots, some rolling targets referred to as rabbits, some incoming targets ) so most of us that shoot Sporting use a number of different chokes depending on the range of the target.
You can use any 12ga shotgun that is capable of loading 2 shells / because you will have some "true pairs" where both targets are in the air at once.
O/U's dominate the game, but there are a lot of semi-autos and a few pump guns seen on the courses - but you can shoot whatever you want / even a 20ga if that is what you want to shoot.
Last edited by BigJimP; August 25, 2009 at 07:22 PM.