Well I can tell you that in parts of PA the low gun single shot rules still live. Wooden traps are still used along with trap and handle pigeons which are rigged. This is much more difficult then jump box shooting. This is a 10 bird race and is often own with as few as 7. There are also still teams that pit one shooter against another and each team has their bird men who try to fly bird away on the opposition. The model 12 is still the most popular fun for this game.
This is a pretty good book on PA shoots. The whole book isn't about the shoots, more about the authors childhood, but what is there is pretty informative. I think Fair Chase had some copies also.
CHAZ
Pigeon Book 
