Digweed is a phenomenon. His eyesight was way beyond other shooters in his prime. His chosen method is swing thru and he is the only guy at the top of the game to master in the way he did. But I can tell you with certainty he employs other methods when push come to shove. Its just that his default method is swing thru. So Don't get hung up on methods. I avoid swing thru if I can. I don't like to chase birds/targets. It relies too much on timing and when your timing is off a bit or you encounter tournament pressure, you are going to struggle. Instead I'm always trying to match the speed in front of the bird/target. It gives me a better opportunity to get good focus on the bird/target. I want to really control the speed of the gun/target before pulling the trigger.