As for George Digweed I believe anyone can hit a clay at 100 yards; eventually! What one can't do, and that applies to George Digweed although he may hit a higher percentage than most, is do it consistantly. Try hanging a clay pigoen on a piece of string edge on and firing at it at 100 yards. Then try a clay flat on at 100 yards. I bet not all that many get hit even firing at the stationary object.
I will sometimes take a Bushnell range finder out with me when walking the dogs and point it at birds going over such as crows and gulls. It gives a good idea what things look like at whatever range. If you have one then it is an interesting experiment. Lagopus....
