A good question, and it really falls more to the manufacturers of the shafts choosing to make wedge offerings in a .355. It is no problem to use a .355 in a .370 hosel ( I do in my wedges). I used the SHIMT shim made to use on a .355 tip shaft installed into a .370 hosel. The reason most of the wedge shafts are .355 is that the .355 will work in both a .355 and a .370. A .370 will only work in a .370, unless you drill out the head.
Date published: 2016-03-18