I just purchased a Remington M887 Tactical shotgun. I bought it for a close range, brush coyote gun. The 18" barrell is perfect for maneuvering in close quarters and the 3 1/2 magnum gets the job done. It comes with a "tactical" choke. It has a wicked looking end on it similar to a hole saw bit. Is this what makes it "tactical?" How does it compare to a full choke? It will be used in brush and for distances 40 yards and closer.