USGolding

I am working on re-shafting a set of Cleveland Launcher HB irons, and purchased UST Mamiya Recoil 680 SC shafts, which have a .370″ tip diameter.  These are too large for the hosel bore of the iron heads.  The factory shafts were True Temper Dynamic Gold DST98 S300.  Anyone know what tip diameter I need?  And going forward, what is a good reference to find this information?

snowman9000 answered ago