This isn't stated as a falsehood ...........
Billy Perdue was a pigeon shooter extraordinaire. He was one of the few that still used a S X S, in his era, and enjoyed a good degree of success in the USA and abroad. He stated something to this effect: "Flyer shooting is a game of elevation, primarily. Two barrels (in the line of sight) gives a better reference of elevation than one barrel does." That is not a direct quote, but is what I remember of an interview with him many years ago. Paul might be able to better clarify, as he was a close friend of Billy's for many years.
I might add that decoyed ducks can be a situation where elevation adjustments are of great import, as well. I have had no small degree of success using S X Ss on decoyed ducks.
