
Jack Hirsh
May 23, 2025
The Mizuno Pro 243 and S-3 are both great forged iron.
Jack Hesh/Golf
wI tried it, and it’s a Golf.com series about golf, including clothing, gear, accessories, etc. – we recently brought out the spin. We are here to be honest, without currency, and adopt the latest and greatest golf or golf items. So, scroll down to see what we love about the latest (or new) products of golf.
***
Have you ever seen a new golf club that looks so great that you will do your best and ignore better judgments just put it in your bag?
Yes, that’s how we get into articles like this.
Ever since my dad cut off a set of MP-52s and put some lead tape in the cavity to swing them properly, or at least better. Since then, I have a set of MP-64s, which are sadly not what I have, a set of MP-18 MMC, a set of JPX 923 forging and touring, and then last year, I played a combination of Mizuno Pro 245, 245, 243 and 241 Irons.
Given my role as a device writer, I hit a bunch of different OEM irons. I’m sure I’ll use another OEM’s suit in the competition, but now I still have what I know about.
This year, when the company announced its new Mizuno Pro S-3 Irons, I knew these were the clubs I had to add to my bag.
Mizuno Pro S-3 Irons | 3 Things to Know
go through:
Jack Hirsh
The S-3 Irons is the first in the new Mizuno signature series in the legendary Mizuno Pro series, as Mizuno’s Chris Voshall told me at the launch. They are single-piece forged iron in 1025E pure mild carbon steel and have the company’s grain flow forging process with an incredibly smooth feel. They are also one of the firsts to have a new triple sole that adds a bounce on the front edge to help the turf interact.
Then I saw Mizuno staffer Ben Griffin on WM Phoenix Open that the S-3 is the best hardcore the company has ever had, a company with fake iron history.
But when the PGA Tour player (and the ultimate winner) tells you how much he likes a set of hardcores that are shallower than the kid’s pool, and you’re a 2 obstacle that hits 4 greens every once in a round, it’s probably a sign that you shouldn’t play the same club.

Mizuno Pro S-3 Custom Iron
The Mizuno Pro S-3 Irons represent sophisticated craftsmanship and elite performance, combining Mizuno’s famous forging expertise with the precision and versatility required by today’s golfers. With its stylish, compact silhouette and a great feel, the Pro S-3 is the ultimate choice for players seeking precision and control in every shot. The iconic Mizuno Pro Feelthe Mizuno Pro S-3 offers the iconic feel that solidifies Mizuno’s reputation. This unusual feeling stems from the high-definition craftsmanship of advanced grain flow forging, performed only on the Hiroshima plant in Mizuno and enhanced by quality materials: 1025E Pure Select Select Mimper Carbon Steel: Provides the soft, responsive touch that golfers love. Copper Base: Cleverly enhances vibration mode to ensure smoother and more connected every strike.
View Product
Also available: PGA Tour Usperstore, Mizuno
Still, knowing that the S-3’s loft is weaker than most of my combinations of 243s will give me some extra height I want, I replaced the Short and Mid-Mid-Irons 6i-9i with the S-3. I still keep the 243 in the 5 iron, and 245 out of the 4 iron is in the 4 iron, because the S-3 5-EROIR is too difficult for me to stabilize the ball speed.
It was in late February, so my swing wasn’t clear or mid-season form. So I mistakenly discarded any misfortune because I just lost practice and didn’t think much about it.
There was a shot in one game and I hit 6 irons and the ball on my toes was so big that it was short and right.
After two months and several competitive rounds, it’s time to have a reality check.
Pro 243 vs. Pro S-3
;)
Jack Hesh/Golf
Anyway, what is the difference between these two irons? Both are Mizuno Irons, both forged the company’s grain flow forging process, both with similar offsets and blade lengths, and both are designed to feel very soft and smooth on impact, thanks to the copper base layer. But that’s the end of the similarities.
The Pro 243s is what I like to call the speed cavity, which is located in the middle of the distance between the player cavity and the player’s iron. Starting with the 7 iron, the 243S has a micro groove and a two-piece construction to make the face faster. The irons also come from 4120 chromium, which is faster than 1025 carbon. Compared to the S-3, the top line is actually slightly thinner, giving the impression of a more compact iron, while the sole is slightly wider, making it more tolerant.
There were stronger lofts in the 243s, which is part of the reason I wanted to cut them out because I felt I needed higher peak heights, while the S-3 was about 2 degrees weaker.
;)
Jack Hesh/Golf
With the Pro S-3, many techniques are left out for players who want to score precisely. This is for players who are even unfortunate enough to want to fix their 7 irons in 175, not 177, not 173. They can tell the misfortune of subtlety. Voshall told me that the signature line started because the feedback from travelers was that they didn’t need new irons every two years, because the technology of the tour steel technology would not change often. Therefore, the signature line will have a four-year product cycle.
All the good shots I’ll shoot on the S-3 are as good as the ones I’ll shoot in the 243s. In the course, I never noticed that I would hit the ball firmly and not as I needed it.
Bad guy, this is another story.
test
I use track and field athletes to face each other in the interior
Both clubs are Mizuno standard .25-inch long (37.5-inch 7-iron), axle with X 6.5 axle, swing weight D5, lie angles from 1° to 1.5˚ degrees flat (60.5˚7-MIOR, S-3, S-3s, S-3s are all 0.5° standard), the Loft is weak, and the Loft is both 34 degrees (standard 34 level) (243 s-1 3). This test was also performed on Titleist Pro V1 golf, which is the ball I played since I played and does not require a lot of spins.
I waved five swings with each club, and by chance, each club didn’t know.
;)
Track and field athletes
At first glance, in fact, I seem to produce higher ball speeds and rotate with S-3, although it gets shorter and the dispersion is better while centered, it is not as tight as the 243. I love drawing the balls, so seeing the time I flipped 243 more easily isn’t a bad thing either.
You can also see that, compared to the 243’s misfortune, it still flew to four yards, although 3 miles slower than the S-3’s misfortune. This could be the difference between covering the bunker or inserting the lips.
But when we delete the misfortune of each club and take my good swing as punctual, the data is really clear.
;)
Track and field athletes
Now, we see the dispersion of the 243 tightens sharply, while the S-3 is still quite wide. Additionally, the consistency of my ball speed and carrying amount dropped to almost negligible numbers.
On average, the ball was nearly three yards away and stopped for half a yard. Since I hit so high I really don’t need a lot of spins, so 6500 is a good number for me. Another reason why the Pro V1 is good for me.
This test is not about finding the furthest iron. If I want, I will play a group of players distance iron. I wonder, when I swing with 7 rail, it will go the distance I expect.
Another very interesting insight here is that I swing nearly a mile from the S-3 an hour faster than the 243. There may not be much aerodynamic difference between the two clubs, so I think I’m subconsciously trying to swing the S-3S faster in order to hit them 243.
That’s not a good, consistent golf secret!
Bottom line
The Pro S-3 is still amazing iron. It has the same Mizuno feel that makes its followers so loyal to the brand that they look beautiful in the address and in the right hands of the players and will produce very consistent and precise results.
Unfortunately for me, I’m not that player, it took longer than it should, but I’ve accepted it.

Mizuno Pro 243 Custom Iron
Mizuno Pro Erons is the result of a long-term connection between Mizuno’s club engineers and the legendary cereal flow forging factory in Hiroshima, Japan. Carefully considered each part of the millimeter and subtle curves shape the future of golf club technology. Key Features of the Mizuno Pro 243 / Tour Speed: Grain Flow Forged HD in Hiroshima, Japan 4120 Chromoly with Flow Microslot (4-7 iron) Soft Copper Underlay for sensing feel Harmonic Impact Technology for a soft muscle-back feel Wrap Around Sole Grind for improved turf interaction Exceptionally compact players’ profile Increased bounce angle for enhanced performance Full Satin Brush finish Available 4-GW / RH only
View Product
Also available: PGA Tour Usperstore, Mizuno
I put the first round of 243 back into the bag and hitting it became easier. The ball is going to where I’m looking for, and I don’t have to feel like I’m forcing anything.
You’ll often hear Johnny Wunder talk about “raising the floor” here, and while I can hit the greatness of the S-3, they won’t relieve my misfortune to “raise my floor” like the 243s. This game is not about making your best lens better, but making your worst lens better.
Both are great hardcore, but for me and my game, I will stick with 243 as they will help me shoot the lowest score.
Want to find the best iron for your game? Find a club location near your True Spec Golf.
“>
;)
Jack Hirsh
Golf.comEdit
Jack Hirsh is the assistant device editor for Golf. Jack is a Pennsylvania native and a 2020 graduate of Penn State University, earning his degree in broadcast journalism and political science. He is the captain of the high school golf team and recently returned to the program as head coach. Jack is still* trying to stay competitive among local amateurs. Before joining golf, Jack worked for two years at a TV station in Bend, Oregon, primarily as a multimedia journalist/reporter, but also produced, anchored and even presented the weather. He can be contacted at jack.hirsh@golf.com.
Source link