It may also depend on the kind of face insert on the wooden club. Besides the original fiber inserts, there have been a number of materials that have been tried in wooden heads. I have persimmon drivers with steel inserts, graphite inserts, and one called a glass gamma-fire insert. Both made claims of increased ball speed and distance when they were introduced. I would guess that your data is based upon a wooden head with an ordinary fiber or phenolic face insert.
8/28/15 at 12:43pm