If you're shooting clay birds, having your left foot pointed at the spot you're going to break the target works pretty well. Of course in the field, on a surprise flush, this can be tougher. But if you can remember to take a step in the right direction as the bird flushes (again, not easy to do), it will help. As someone pointed out, if you're a righty, swinging very far past your left foot is hard, because your left hand is leading and you run out of swing. For the same reason, you can swing a lot farther left. Not quite like a baseball bat, because your hands are together on the bat. But one similarity is that in your stance, you are pointing your feet where you intend to hit your target (the ball): right over the plate.
