I am not sure about all of the 3D tournaments that IBO puts on but at the Southern Triple CRown event, you do have to be an IBO member to shoot in it. HUnter class is a good one to get started in. I shot in the first leg of the southern triple crown and the people there were really great. YOu will meet a lot of really great people at the shoots with IBO. Good luck and shoot for the 11 ring....