Hey there...I'm new to the forum and was hoping to get some club fitting help. I'm hitting Ping S56 irons with Regular (DG R300) shafts. My 6 Iron SS is 92. My last set of irons were Titleist 690MBs with the same shafts. I'm playing at 4000ft and can't seem to get an 8 iron to go over 150. 6 iron 175. doesn't seem right to me at sea level (a few years ago, I'll admit) i coul;d hit an 8 iron 160. If my math is correct, that 150 8 iron is really 138! Could it be the shaft?