- Edited
When I was building drivers they were all 44 or 44.5" and worked quite well and usually D1 or D0 swing weight.
With OEM drivers at 45.75, I have little success at that length unless I choked down. Even that was no guarantee. Also OEM shafts are usually counterbalanced to keep the swing weight down.
Getting tired of all this with OEM's, I got fitted. At full length and chocking down, Ping (stock head and shaft) was yielded less distance and was the most erratic. Callaway and TM paired with their lighter shafts were much better. The best was a TSi1........lighter weight head and shaft.
Bottom line, whatever length provides the best center strikes should yield the best distance.