Check this site out - claims competition roots back to 1901 - originally used gun barrel as blowpipe. Shoot from 8.15 M - at a target 1.3 M from the ground. 6 ring target - outermost ring is 4 cm (1 point) bulls-eye is 7 MM (6 points) - 2 shots per round, 8 rounds (16 shots - perfect score = 96 points: current competition high score is 63).
Barrel is steel (100 Euros) - just over 4 ft. long - bore between 9 - 11 mm, 10.3 average, weighs between 4 - 4.5 Kg. No weight or measurements on the darts, but they look like a nail with a funnel at the back, into which is inserted a wooden shaft, that is fletched with 6 wings (feather ot silk - although some use a cork stopper).
Alternate targets: a 12 mm bulls-eye, with a 1 mm pip centered - closest to pip wins. Also a 4 cm wooden "duck" - flat body held parallel to ground. 4 pieces - body, 2 wings (45 degrees, parallel to body, and a head (perpendicular to the body). Suspended at 8.15 M on a pole above the shooter. Wire backstop to prevent errant flights. 3rd one uses 3 ducks, on a trident like device - about 10 cm apart. Idea is to hit the body of the wood duck, not the wings
it's all in French. http://www.sarbacane-france.com/