There are going to be multiple times during a game when a wing player needs to fill up along the perimeter. Whether it is a guard using a ball screen and having to fill up, or a cut and replace action, (just to name two examples) there are going to be times where the wing fills up and receives the ball. The quicker the wing player fills up, the more time they will have to get a shot off, or make a move. This basketball drill is only going to work on the catch and shoot aspect of it, but along with it being a shooting drill, it is also great for working footwork. The shooter must be able to first recognize timing, and then must work to create a great passing angle to receive the ball.
The great thing about shooting drills like this, is that you can also turn them into conditioning and mental toughness drills. It is important that the player comes up with the great pace on each shot, and also comes into the shot the correct way. As they begin to get tired, the fatigue will begin to cause them to practice poor shooting habits. The player must be able to fight through this though, and stay mentally tough to keep great shooting form.