Don't know if it will help, but you might check with these guys, click HERE
. On the left side go to "Sporting Activity" then go to "Competitions" then "Pistol and Air Gun" then "2004 Air Pistol Results" Don't know much about it, but if they have "results" then they must do air guns in Texas.
What kind of pistol are you talking about with the "rapid fire pistol shooting?" Air guns or regular?