Came on this thread as I have similar issue. Like @Craigers above, I also played the same set for 25 years !
Ping Zing 2 (who remembers them ? !) - green dot.
I was custom fitted for replacement set & they said I needed white dot, which is next up steeper lie angle. Bought Ping G430 irons white dot.
I weighed old vs new 8 irons & they were surprisingly identical in total weight : 445g
Should really have gone to range first but played a round today as I couldn’t wait to use them, & was shanking/slicing most shots right, which is something I never used to do. I need to go to range & get familiar with them, but was very surprised today how, even when trying to close the clubface a little, I was still shanking/slicing a lot of the time.
Thoughts welcome.