Hello,
I shot in a clout/flight competition on Saturday and have got some official distances to report. Over here the BL-BS run a 'Standard Arrow' and flight shaft shoot at some of their events and you get 2 shot with the former and 3 with the latter. Basically the Standard arrow stipulates a small medieval war arrow. As a minimum it must have a 3/8" parallel/bob tailed shaft and 6"x3/4" triangular fletches armed with a hand forged bodkin/broad head, and weighing at least 803 grains (52g).
Mine had 12mm bob tailed ash shafts and weighed 65g or 1003 grains with the above fletchings and shot 273 yards. The best flight shaft went 338 yards. The weather was a bit blustery and damp but could have been worse.
Cheers,
Jeremy