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Mizuno JPX919 Hot Metal Irons Review

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The Mizuno JPX919 Hot Metal irons are for the player who wants Mizuno in the bag but needs super game improvement forgiveness.


Based on brand reputation, you would be forgiven for thinking that Mizuno only makes irons for the single-digit handicapper.  However, over the last few years, Mizuno has put out a series of high performance SGI irons under the “Hot Metal” name.  Does the latest iteration stand up to the competition?  We tested it to find out.


The JPX919 Hot Metal picks up where the JPX 900 Hot Metal left off: it makes SGI look good.  Its top line appears roughly the same size as the JPX919 Forged, and it uses two different finishes to hide some of its bulk.  There is less offset than you would expect from an SGI iron.  It is bulky in the toe, but the blade isn’t overly long.

In the bag, the JPX919 Hot Metal, like the other irons in the series, has no colored paintfill.  This gives it a timeless, classic look.

Sound & Feel

Another way in which the JPX919 Hot Metal irons are distinct from other SGI irons is in their feedback.  Where most irons in this category try to cover up mishits, these are loud and clear when you miss the center.  Pure strikes have a crisp, clicky sound.  Mishits are loud and clanky.

The feel of the JPX919 Hot Metal is neither inspiring nor offensive.  They’re not “Nothing feels like a Mizuno” soft, but good strikes feels solid and hot.


Like previous versions, the JPX919 Hot Metal irons are all about two things: forgiveness and distance.  They deliver on both counts.

Mizuno credits the use of Chromoly 4140M and a “seamless cup face construction” for the high ball speeds that the JPX 919 Hot Metal produces.  The ball speeds are outstanding with smash factors regularly topping 1.4.  It’s also worth noting that part of the distance equation is the strong lofts.  These aren’t the strongest lofts I’ve seen, but they are about 4 degrees stronger than the JPX919 Tour.

The other part of the Hot Metal equation is forgiveness.  While the sole is thinner than the previous generation, it still does a good job of minimizing the damage of fat shots.  Balls hit toward the heel or toe retain strong ball speed and should still end up on the green – assuming you made a reasonable club selection.


If you need a super game improvement iron but would prefer one with more traditional looks, the Mizuno JPX919 Hot Metal is for you.  High handicap players will appreciate both the distance it creates and the forgiveness it brings to mishits.

Mizuno JPX919 Hot Metal Irons Price & Specs

Matt Saternus
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  1. Did you see any performance gains in distance and/or consistency when comparing the 919 HM with the 900 HM?

    • Matt Saternus


      I didn’t test them head to head, but nothing about the 919 made me think the 900 was obsolete.



      • What mizuno club would you consider a nothing feels like mizuno club. Looking for a used set , 15 hcp

        • Matt Saternus


          Unsurprisingly, I think the clubs that feel the best are the true forged blades like the Pro 221. I also think the JPX923 Tour is outstanding. That said, I would hesitate to recommend those to most 15 handicaps.



  2. Matt, Great Review as always! How would these JPX919 HM compare to the Callaway Rogue or the Rogue X irons?

    • Matt Saternus


      The shaping is different. All of them are very long and forgiving. Comes down to fit and visual/feel preference.



  3. Matt . Why don’t club makers have 4 degrees loft thru all set of clubs ?
    Instead of 5 degrees and then 3 and sometimes even 2.5 degrees ?

    • Matt Saternus


      Because the CG moves throughout the set – low in the long irons, high in the short irons. If the lofts were gapped evenly, the distances would not gap evenly.



      • Joeg Voll

        Good Question! I was wondering the same thing about the loft gaps. I’ve heard people brag about the fact that the post sellout to Callaway, Ben Hogan irons all have 4° between each club. How does that work? Seems to me that a 4° gap between a 3i & 4i would account for quite a few more yards than a 4° gap between a 9i & Pw? Have you tested any of the consistent 4° Ben Hogans? Was it a problem?

        • Matt Saternus


          I have tested some Hogan sets and found the distance gaps to be good, overall. There’s never going to be a perfect loft structure that fits every player. For me, I have problems keeping good gaps in the long irons because I’m low launching and I can live with smaller gaps in the short irons. Other people are the opposite. Just another reason why we are constantly beating the drum for fitting.



      • Joeg Voll

        P.S. Excellent Review on the Mizuno irons!

  4. Matt,
    Very nicely done and concise review. Are there any appreciable differences from the 900 series?


    • Matt Saternus


      With the caveat of, “One may fit a given player much better than the other,” I don’t think the two are very different. I was a bit more impressed with the new version than the previous, but it’s certainly not night and day.



  5. Michael Atkins

    Bridgestone Tour B JGR HF2 irons are the irons for me.. Nice review! Massachusetts.

  6. Tom Mullins

    I would love to win the HF2 set of Irons . Anyone I have met who plays and Mizuno product loves them I want to join them

  7. Jim Munro Australia

    Bridgestone irons look tremendous I would be happy with any one of the models.

  8. I have a feeling I’ll be having a blended set of 919’s or Z585/785 this year… Great offerings.

  9. How much distance gain did you experience from your gamer irons?

  10. HF1 irons could really help this duffer. Thanks for review from Ohio

  11. Todd Bonsang

    Hey Matt thanks for the review, I did try these out and liked them very much as I need all the help I can get. But funny thing is that I compared them to the Callaway Steelhead and the Callaway Rogue X. The X and the 919 were neck and neck but the closer for me was the Rogue X hybrids. I’ve never hit hybrids very well and smashed the X hybrids as well as the irons. The 919’s are a great choice but I went with the Rogue X.

  12. Scott Richards

    Hi Matt,

    How would you compare to the new 2019 Big Bertha irons to the Hot Metal and G700? I like the Bertha’s #’s but haven’t hit the Mizunos and Pings
    Thanks for your input as all look like great clubs.

    • Matt Saternus


      I haven’t hit the Big Berthas, but I know Matt Meeker was very positive about them. My best advice is to find a fitter who can let you test them all head to head.



  13. Hi Matt,
    at the moment I have a set of Taylormade M4 with regular steel shaft and I don’t think I’ll go to the a new M6 iron set because I don’t like any longer the way they are taking in terms of SGI irons. A few weeks ago a golf buddy made me try his Mitzuno XPX 900 irons. Really stunning feel and appearance for me. So, I’m considering switching to the new Mitzuno JPX 919, also because I prefer their more sober appearance, confident that they will be better han the ones I’ve tried. Am I right?

    Best regards from Italy

    • Matt Saternus


      I don’t think the 919 version of the Hot Metal is objectively much different or better than the 900 version. Any major difference in performance would likely be attributable to how they fit the individual swinging them.



  14. Hi Matt,
    I recently used the 919 on vacation, and loved them. I went to purchase a set and the Mizuno swing optimizer recommended the project x graphite shaft. I do have a slower swing speed, but am not sure with graphite if i would lose control/ feel around the green (100 yards and in). The numbers on their launch monitor were great, but also good with the steel shaft (not quite as good or consistent) Do you see a problem going with graphite?

  15. James Cameron

    Hi Matt

    I am using and have been for the past 7/8 years the Mizuno MX300’s with 5.5 projectX shafts and loved them

    I am looking to upgrade and am keen on the 919 Forged. 2 questions

    1. have you reveiwed these irons
    2. would there be a huge difference between the 2

  16. Boght and using JPX 919 Hot Metal from pitch to 5 iron with Dynamic Gold 105 regular flex shafts.
    Stunning irons, mishits make good distance without bad feedback to the hands and I improved a lot the average dispersion if compared with my previous Taylormade M4 with KBS stock shaft.
    Maybe I should have chosen the NS Modus 3 Tour 105 shafts, that are a bit ‘less rigid at the same flex, but maybe it’s just a matter of getting used to it.

  17. Are you going to review the 919 HM Pro? I tried them and they are incredible. Would love to know what you have to say about them. Thanks.

  18. Hi Matt, I just found your site and love the content. I’m wondering why you have these as a SGI set where other reviews are GI? Thanks

    • Matt Saternus


      I can’t speak for anyone else and how they categorize things, but for me, when an iron is this big, it’s clearly SGI. If these aren’t SGI, I don’t know what would be.



  19. Pingback: Mizuno JPX919 Hot Metal Pro Irons Review - Plugged In Golf

  20. Hello Matt, Bill from the Upstate of SC. I have narrowed my search down to Cobra King Oversize and Mizuno Hot Metal Irons. I am lefty and play to a 8-10 handicap. Not looking to work the ball per se but increased length and accuracy is important. Any advice?

    • Matt Saternus


      I would strongly advise getting fit for the right shaft and then seeing which head performs better with that shaft. There’s a Club Champion in Charlotte, Raleigh, and one in Hilton Head that I would recommend.



  21. I’m coming late to this thread. Are these irons forged or cast? Can’t find that anywhere

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