FWIW, the Bridgestone ball the USGA had us test was an E5 or E6. The flight characteristics were changed solely by changing he dimple pattern. The dang thing flew like a ProTrajectory but had the durability of a Blue Max.
Dan,
What did the dimple pattern look like?
I've been doing some testing recently for the
Mcintyre Golf Company and their reproduction balls for hickory play. All of their balls are originally made by Wilson but have covers that resemble the balls of the era. I've found that the mesh pattern ball average 15-20 yards shorter off of the driver and shows little difference in distance control with the irons, when compared to its modern counterpart. Their dimpled ball is actually even shorter, around 20-25 yards behind the modern equivalent. Both balls are not as stable in flight as the modern ball, but not to an overwhelming degree.
It wasn't until I read your comment that it dawned on me the easiest way to rollback the ball in a universal way would be to control the aerodynamics of the ball. Many slower swing speed hickory players do not notice a performance difference when playing with a Mcintyre ball, its only the high swing speed players, at which point its the aerodynamics of the ball that is limiting its performance.
I wonder if the USGA required all balls to go back to a "parallel" dimple patter, like you would see on the Spalding Dot, if that would effectively curb the balls top end distance?