[comdpa]

Bought a set of Mizuno MP-32 iron few weeks ago, just realized that they have the same sweet spot postion throughout the set (3 iron to PW).
Quote: “The key to MP-32 and Cut Muscle design technology, according to Lyons, is the perfect positioning of the weight that is "cut" from the "muscle" area of a traditional muscle-back iron and placed in strategic locations in the lower back and surrounding portions of the club. This movement of mass around the club head, Lyons said, ideally positions the center of gravity and creates a consistent sweet spot location throughout the set.”

Per TGM 6-E-2: “Now, the wide face of the shorter clubs allow the sweet spot to be moved a suitable distance back from the leading edge with the result that centrifugal force squares the clubface earlier in accordance. So, with the ball placed farther back from low point it could poroduce a straightaway flight line for all clubs while having the same release point feel. This led to the assumption that one release feel would use on ball location resulting in a constant struggle for consistency. “

I developed following set up and execution procudures after study TGM: for 5 irons, i place the ball in the middle of the stance; for 6 iron, I place a little back of 5 irons; 4 iron, a little further than 5 irons; etc…
For 7 iron, I set up clubface squarely; for 6 iron, clubface open a little bit; 5 iron more open than 6 iron; 4 iiron more open than 5 iron…
8 irons and under, I use AH only; 3-7 irons, I mainly use HH.
I’m a swinger.

this setup worked pretty well for my old iron set but does not seem to work with this new MP-32. I'm hitting 4 and 5 irons pretty good, but hooks 6 and 7 irons like crazy. Is this because of this sweet spot design of MP32? if it is, how do i compensate for it?

The simple answer for this if you are like 90% of players who "swing" is to put the ball back in the stance. You got the book eh? Reference...7-2 bottom of page.