Mizuno JPX923 Hot Metal Irons Review

Hot, Hot, Hot

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Ryan Heiman
Founder and head author at Independent Golf Reviews

Mizuno launched 3 versions of the JPX923 Hot Metal irons: High Launch, Hot Metal and Pro.  There 3 version were in my bag together for multiple rounds as I tested the unique qualities of each version.  The results are Mizuno JPX923 Hot Metal Irons are the longest irons I’ve hit to date.  They not only are long, they have great feel and depending on the model, good to outstanding forgiveness.

This  is my Mizuno JPX923 Hot Metal Irons Review.

Nickel Chromoly…That is the secret sauce of the Mizuno JPX923 Hot Metal Irons.  Each version is made with this special metal which is as the name says, HOT.  Mizuno says it is 35% stronger which allows them to make the face even thinner than previous JPX irons which then leads to HOT faces and incredible ball speeds.  While Mizuno is known for its grain flow forged irons, the magic they do with this metal to create such a hot face, yet still maintaining “Mizuno feel” is impressive.  These guys know metallurgy.  There is not questioning the distance and feel, the big question might be, what model is best for you?

Mizuno JPX923 Hot Metal

The Mizuno JPX923 Hot Metal irons start with the base model which is a forgiving, mid handicap distance iron.  They are largish, and have a healthy offset. They have great looks and surprisingly good feel for a non-forged iron.  For the golfer looking to add some distance to their bag, these are as long as it gets.  I hit a PW 150 yards which is 2 full clubs longer than normal for me.  It did it with ease too, not a “swing out of my shoes” sort of swing.   The argument against these irons that some will say is they just took an 8 iron and marked it a PW.  Why yes they have jacked lofts, but a couple things are faulty about that argument. 
1. The club length is still standard so shaft is not longer.
2 The launch angle is higher so even with stronger lofts, the ball goes higher,
3. They have incredible stopping power like you want from the specific iron. 
It really is an engineering feat to create distance while increasing forgiveness and performance.

Mizuno JPX923 Hot Metal HL

The Mizuno JPX923 Hot Metal High Launch (HL) Irons are aimed at higher handicap, probably slower swinging golfer who needs both distance and launch.  The lofts are higher so that the speed of Hot Metal paired with higher launch angles means distance gains for slower swingers.  I found them only 1/2 club shorter distance wise than the Hot Metal irons, but certainly launch way higher which also means even more stopping power.  If you’ve ever hit an iron into the green and watched it run through because it had no stopping power, they irons are worth considering.  I’ve played with older golfers that don’t launch the ball high enough to ever hold the green, these irons are perfect for that golfer.  High Launch, lots of distance, great feel and plenty of forgiveness.  These are most definitely game improvement irons. They have lots of offset and thick top line.  But performance is undeniable; HIGH, LONG and easy to hit and hold greens.

Mizuno JPX923 Hot Metal Pro

The Mizuno JPX923 Hot Metal Pro Irons I could game very easily with a slight adjustment to my set-up.  They are just as long as the Hot Metal irons, but are more compact and have less offset.  This combination of performance and looks will certainly appeal to the better golfer that still wants to add distance.  If I dropped these in the bag permanently, I’d need to add a wedge since a 150 yard PW leaves a gap before my regular gap wedge.  I’d probably add the GW from this set to fill the space.  While I don’t chase distance, there is something of an ego that likes saying I just hit a PW 150 yards.  These clubs look really nice behind the ball too which appeals to better golfers.  Even better golfers can have trouble holding green with shallow angles of descent so these might be a great option for them too.  They just love to hit the ball high and straight.  Even off center hits are barely punished.

Mizuno JPX923 Hot Metal, Pro, HL

The 3 Mizuno JPX923 Hot Metal Irons leave you with choices.  You can demo them with the Mizuno shaft optimizer technology and get different shafts and grip combos to fit your needs. These sets aren’t really designed to be mixed and matched into combo sets.  Each one really stands alone as a full set of irons.  I received 5, 7 and PW in each iron version so it was a little harder than normal for on-course play because they didn’t fill out a set and they were so long, I couldn’t just plug in the missing irons from another brand.  However, they are HOT in each version, it really depends on your needs.  It is launch, is it distance, is it distance, but not off-set?  The numbers are impressive, the look amazing and feel like a Mizuno so it really is just about what fits your game’s needs.


Hot, Hot, Hot is really the best way to describe the Mizuno JPX923 Hot Metal Irons in any of the 3 versions.  Mizuno is all about the metal with the Nickel Chromoly they use in these irons to create such a thin, hot, forgiving face.  Mizuno really raised the bar on distance irons with 3 options, HL, Hot Metal and Pro.  While you might know already which model is a good fit for your game, I highly recommend the shaft optimizer which only takes a few swings to pair the iron heads with the best shafts for you.  While “Nothing feels like a Mizuno” is their tag line, these might be better described as “Nothing goes as far as a Mizuno.”

For more information: Mizuno Golf

Featured pick #4 on Best Game Improvement Irons

Mizuno JPX923 Hot Metal Irons – KEY POINTS
  • ℹ️  About Mizuno designed 3 models of JPX923 Hot Metal irons to fit a wide variety of golfers looking for distance, forgiveness and easy launch. If you are looking to increase distance and increase stopping power, these HOT irons might perfect.

  • ✅  Pros HOT, Longest irons, Good looks, Excellent feel, Easy to launch, Lots of forgiveness, 3 models to choose from.

  • ⛔  Cons Distance isn't for everyone.

  • ⛳  Verdict The Mizuno JPX923 Hot Metal irons are the next evolution in Mizuno irons that reach a broader audience than the forged blade crowd. While Mizuno is know for feel (and these are good) the Hot Metal irons are all about distance. However the benifits of Hot Metal distance is accuracy, consitency, launch and stopping power. If you could use some HOT in your irons game, check out the JPX923 Hot Metal, Pro or HL irons.


About The Author

Ryan Heiman – Founder and Head Author of Independent Golf Reviews
Ryan has over 10 years of experience testing and writing golf reviews of nearly every brand out there.
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