My 150yd iron goes 162. and so on. The ball plays into this I'm sure, I'm using the 94 Nikes. Hope this helps a little, also remember that I'm still experimenting.
That sounds right from what I understand. I have never mapped clubs, but I have read that if you take the "ball distance factor" you can roughly estimate what that club with play with a little math. I would have guessed 158 -160 using your L94 Nike ball and the 150Y iron.
It may not be as accurate as mapping your clubs, but it has gotten me close enough to save time effort and energy mapping clubs so far, but I am no where near as experienced as the elite players on here.
I am also looking at these irons which I hope to unlock in about 6 more days.