The KE4 U30 5 Iron has an MPF of 1014 – I’m curious to know what the MPF of the 6 Iron would be so I could compare apples to apples.
Sorry for the delay. The MPF on the U30 #6 iron came out to 951. #5 and #6 were done up until 2010 and then sometime that year we decided to switch to do all #6 irons. Ralph shows in his book where he measured complete sets of irons to see the variability of MPF within a set. The differences in the 5 and 6 irons on the sets in the book range from 0 difference to about 70 pts difference. Differences occur because of the loft and lie variations, bounce variations, weight variations and how these specifications effect the cg location.