Mizuno JPX923 Hot Metal VS Srixon ZX4 Irons EXCUSE my Poor Strikes 

Great review. I’ve hit both sets quite extensively and found that the sound and feel of the Srixon irons were much better, at least to my ear. The Mizunos were slightly more forgiving but I did hit the Srixons a bit higher and further.

Nice work as always, Jay! I have a funny set of Srixons: 4, 6, and 7 in the new ZX4 and 8-PW in the prior generation ZX7. I like the bigger head and wider sole in the longer irons, but I don't like seeing it in the scoring irons. Had to jigger lofts around a bit to get decent gaps, but I'm sub-80 with 7-iron, so roughly 5º gaps work for me anyway. And the 4-iron is mainly for punches, escapes, and tee shots where I don't need to worry about descent angle. Still, off a tee (with a decent strike) it goes plenty high enough to hold a green, even at my slower speed!

I like feel, sound, forgiveness, flight and price! Who doesn’t? I’d game either of these!

Been going through a bunch of your reviews so thank you for those! Brand new to golf but my cousin said I’m quite good for being brand new. Taking that with a grain of salt and I know my swing speed isn’t fast. But being 33 and athletic I’m trying to decide between the Srixon zx4s and the hot metal HLs as they can be found on the used market for about the same price . I am wondering if you have any feedback on which to go with? I should be able to test the hot metal HLs in a shop but I doubt the zx4s are available since the new model came out. I guess I just don’t have a sense of what my swing speed will grow to with practice that is focused on improvement but not specifically trying to increase speed. I can’t seem to find out what the typical swing speed is for a younger athletic male either.

I really enjoyed this review Jay. Exactly the kind of review I was looking for. I disagree somewhat with comments saying this should have been done with lower swing speeds. For the JPX923 HM HL (High Launch) then sure, but I play the JPX923 HM (love them) and have a swing speed very similar to yours. I'm glad to see how well the JPX's compared in this review. Based on the excitement I see all over RU-vid over the Srixon's (and now the new Titleist line - like the T350 similar to these) I was starting to think that just like Pinocchio wasn't a real boy, I wasn't a real golfer playing the 923's. ; -) My wife gave me the go ahead to spend some money on clubs this year (first time in approximately 10 years) so in reality I bought both the JPX923 HM and HMP in 4 iron through PW and also bought the JPX923 GW, SW, & LW (love those 3 clubs). Based on your recommendation (which worked out great) I don't use either 4 iron but instead am using the Cleveland Launcher XL Halo 4 "Hyrid Iron" (that thing performs like it's on rails - oh wait it really is : -). 5 through 7 using HM, and then 9 & PW HMP. I can't seem to make up my mind on the 8 iron (keep going back and forth between HM & HMP on that one). I am thoroughly enjoying the performance of this setup and went in that direction in large part because of your excellent detailed reviews. Thank you!

How much difference would you expect to see hitting the Hot Metal High Launch vs the standard Hot Metal?

great review Jay....i would be leaning more to the JPX923 Hot Metal....not by much but would love a set...." Whats that Jay ? you wanna send me a set , well ok if you insist "LOL...have a great day....Cheers

HIt both in a fitting and, for me, the HM had a better trajectory. Actually got the HM HL due to gapping and lofts with similar performance to the HM and already had a a 25* TM GAPR mid that I liked a lot.

Hi Jay, the reviews are great. I think you hit the nail on the head with trying to match the swing speed with the target market, the HM HL may be 70mph, the new 241 90-95 mph. People shouldn't need spoon fed. From the reviews i can work out if these need to go on my shortlist or not, even if you swing at 93 and i swing at 83 i can work it out. Based on your reviews i have a Srixon fitting booked for Monday night, so apologies if i am late for the livestream. Your style and delivery is spot on, keep up the great work and ignore the trolls.

Good review.

Hi Jay do you do fitting and if so where are you based?

I had jpx 921 hot metal, they were a good club for learning on, now I play p770 irons and I love them for the feel and workability. The forgiveness irons make it hard to shape your shots which you won't need if your using these.

Please consider a player's distance iron shootout with the new big dog on the block: T150. Oh, and this further confirms my suspicions about hollow body irons as a toe hitter. 😅

According to many websites I've researched, the average swingspeed of amateur golfers with 7 iron is 75 mph. Most game improvement and distance irons only seem to suit faster speeds than this. Unless you want to hit ballistic missiles low that won't stop. The average population of golfers are ageing. We may strike the ball well but have lost our speed. We don't seem to be catered for in most reviews. Transtion to hybrids is key. You mention it but seldom test it other than with the JPX HL range.

Thanks for the compare. ⛳️🏌🏽‍♂️

Would be interested to know whether either of these are adequate for sub 80mph 7 iron swing speed…

Jay..assuming both have the same shaft, length, flex etc..

Thanks for the review? What shaft and flex on the zx4?

I currently have the Srixon ZX4 MK II and I have to say they are nice clubs but I don’t find them very forgiving. Luckily I also have a set of Mizuno 923 HM HL, now these are unbelievable clubs, very forgiving, long and what a feel way way better than the Srixon in very way in my view.

Is there a ZX5 v 923 Forged v Cobra CB comparison upcoming?

Hi Jay I really think you need to get a friend in to help you with your reviews , with a slower swing speed. The majority of people these clubs are aimed @ are not swinging around the 90s. I would honestly consider getting a friend or subscriber to do the testing for game improvement irons. your numbers cannot be calculated to someone with a swing speed up to 20mph slower than your self. Not knocking you you know I support your channel and your reviews are some of the best on YT.

66yr old with bad back. Loved both of these till I hit them. The Callaway Ai Smoke was better for me.

Have u warmed up yet ?

Help me out. As an American I’m curious why the English and Canadians say Zed instead of Z (Zee)/

Just got fitted and tried both of these clubs and I must say these are the two best clubs ever. There is no need to look elsewhere unless you prefer the look of another iron. Forgiveness: definitely goes to Mizuno, didn’t matter if I hit bad shots, they all went high and far. Zx4 Mkii weren’t as forgiving as I thought they would be but if you make good contact, the ball goes further and straighter than Mizuno. Feel: Zx4 Mkii hands down. Best in the business. Sound: Zx4 Mkii hands down. Looks: zx4Mk ii are the best looking clubs I’ve ever seen…ever. If you value forgiveness more than feel, sound, looks, then Mizuno is the one, otherwise Srixon Zx4 Mkii is the best.

11:15. exactly why I play these

Would a better comparison be hot metal PRO with the ZX4?

2/3rds of golfers are over 50 and 1/3rd over 60 in the UK. Testing 7 irons at nearly 95mph and sometimes 85 mph is of little use to the majority. We need 75 mph which is the average. Mizuno recognised this with the introduction of JPX HL. Isn't it time review sites catered for the slower swingspeeds. It's the older generations who spend the most money searching for what they've lost with time.

Which footprint is bigger, the z4 or the mizuno forged?

So every game improvement iron is basically the same 🤷‍♂️

Love you reviews but why don’t you warm up before filming so you take that warm-up factor out of the conclusions

How many golfer who need these game improvement clubs swing 94 mph? You should have someone that swings more like the player these clubs are designed for....

Excuse your poor strikes? You were just playing to the strengths of these irons.