Expect less bulge-and-roll benefit at average speed
Testing bulge and roll on a driver and a wood, the speaker says the curvature is effective there but doesn't have the same impact for the average player, since an average swing doesn't create the same curvature. Their takeaway is that at regular speeds a player doesn't need the extra curved face Bryson is now playing with.
Channel: Club Champion
Watch official source at 17:17Why this context matters
Concluding takeaway of a bulge-and-roll face-curvature test.