"Beware, though, there are two versions of the 391, field and target. The target model is heavier so if you're shooting clays, be sure to get a target model."
In addition, if you are shooting a clay game exclusively then get a 391 named after the discipline. Trap for trap, sporting for sporting ... a lot of hair splitting could apply but I believe this is good general advice. If I was going to shoot a little of everything then I'd get a sporting model. Caveat sporting is the game I enjoy most.