If radar gun is calibrated and a ten yard pole is used for height 8 to 10' why can't the ATA determine a speed mph 41 to 43 or so, to throw a 49 to 51 yard target?? Most targets in US are white flyer(weight should be close), specify where gun is to be held, on house,? or @ 16 yard on a 4' pole to control height of gun or some consistent method? Your local HP doesn't seem to have a problem in determing your speed!! If wind is the problem to determime distance of target do a few tests in a indoor arena? If altitude is a problem maybe a few test in WYO. or Utah. Can't be that tough for the ATA to create some consistent method. The ATA has rules for everything else, why not one more? If the powers at hand condone Radar or Chrony add a few more guidelines instead of evading the issue?? What do you think???