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By Jamie Boudreaux
Last Update: August 29, 2022  

Which set belongs in your bag?

Mizuno JPX 921 Forged & Hot Metal Irons

Thanks for checking out Golfer Geeks' comparison of Mizuno JPX 921 Forged irons vs Hot Metal irons.

I'm an avid golfer, a 9.2 7 handicap on my way to a 2 (been a 5.6) and frequent tester of golf clubs and equipment since 2015.  

I did the bulk of my testing on the course for this comparison. My driving range was closed often because of near daily rain. 

Summary: The Mizuno JPX 921 Forged irons might be are my new gold standard for low handicap irons &  the Hot Metals might be are my new gold standard for game improvement irons. I've never hit better feeling (or performing) irons in my life. I give more details below - including specs for each set. 

In this comparison of the Mizuno JPX 921 Forged and Hot Metal irons, I discuss my experience with the clubs, unique features and benefits, and my pick for which iron set I'd buy.

Mizuno JPX 921 Forged Irons

The Mizuno JPX 921 Forged Iron Set

Set Tested - 4-PW, Standard Lie, Right Hand

Shaft: Extra Stiff, Steel, True Temper Dynamic Gold X100

Mizuno JPX 921 Forged Irons Specs

The 921 Forged irons are on the bigger side for "player" irons, but aren't bulky and have attractive elegant lines. The lofts are strong (see above), they have unbelievably soft feel, and are pure pleasure to hit. Now I know what all the fuss is about.

Though they're made for players, I think any golfer within a couple strokes of a single-digit handicap should be able to handle them fine. They are plenty forgiving and go.

As always, TEST before you buy when possible. 

Mizuno JPX 921 Hot Metal Irons

Mizuno JPX 921 Hot Metal Irons

Set Tested - 4-PW, AW Standard Lie, Right Hand
Shaft: Extra Stiff, Steel, FST KBS Tour 130

Mizuno JPX 921 Hot Metal Irons Specs
Mizuno JPX 921 Forged & Hot Metal Iron Soles

The Hot Metals look similar to the Forged, but are noticeably bigger when placed side-to-side. They're more forgiveness. And, the lofts are stronger too for even more help with distance.

I got ALL the good feels with the Hot Metals that I got with the Forged. 

Testing the JPX 921 Forged & Hot Metal Irons

Mizuno JPX 921 Hot Metal vs Forged irons

Simple, I played a couple rounds with each set of irons. I had to account for the difference in loft from my every day set so I could pull the correct club. I played everything as I normally would during a round. 

I managed to get 1 range session in with each too. 

Are there big differences between the Forged and Hot Metal irons?

Mizuno JPX 921 Hot Metal & Forged Irons

Cosmetics - Hot Metal clubheads are bigger.
Performance/feel - not really.

The Hot Metals are built to look and be more forgiving. But, the Forged irons are plenty forgiving for player irons. 

The Hot Metal lofts are stronger, so you expect to get a little more distance. They both get the ball up quickly and easily. And, they feel as good as irons can feel. 

Looks

They look identical from a few feet away. You don't see obvious differences until you get them side-by-side. The Hot Metals are bigger, thicker, and have a touch more offset.

I prefer compact clubheads, so...

Winner - Forged (for me)

Sound/Feel

Identical

Winner - Draw

Playability/Ball Flight/Accuracy

Same for me.  

Winner - Draw

Forgiveness

They're both great, but I give the edge to the Hot Metals.  

Winner - Hot Metal

Distance

Again, they are both plenty long. But, the Hot Metals are designed to help more with distance.

Winner - Hot Metal

So, which irons should you buy - JPX 921 Forged or Hot Metal?

Want more forgiveness, help with distance, and larger clubheads (game improvement irons)? Hot Metals for you.

Prefer more compact clubheads and don't need much help with distance or forgiveness (player irons)? Forged for you.

Which set would I get? It's the JPX 921 Forged irons for me.
Their heads are more compact and their lofts are closer to traditional.   

My #1 suggestion is to test both sets before you buy. Either at your local golf store or take advantage of Global Golf's Utry trial program. I use it and recommend it. 

Thanks for checking out my comparison of the Mizuno JPX 921 Forged irons vs Mizuno JPX 921 Hot Metal irons

Editor's Pick Player Irons
Editor's Pick Game Improvement Irons
5.0
5.0
Pros:
  • Unbelievably Soft Feel
  • Plenty Distance & Forgiveness
  • Premium Looks
  • Great price
Pros:
  • Buttery-soft feel
  • Plenty Distance & Forgiveness
  • Elegant Design
  • Great Price
Cons:
  • Would prefer heads to be more compact
Cons:
  • None at all
Description:

Get 8% off with Coupon Code: GolferGeek

Description:

Get 8% off with Coupon Code: GolferGeek

Editor's Pick Player Irons
5.0
Pros:
  • Unbelievably Soft Feel
  • Plenty Distance & Forgiveness
  • Premium Looks
  • Great price
Cons:
  • Would prefer heads to be more compact
Description:

Get 8% off with Coupon Code: GolferGeek

Editor's Pick Game Improvement Irons
5.0
Pros:
  • Buttery-soft feel
  • Plenty Distance & Forgiveness
  • Elegant Design
  • Great Price
Cons:
  • None at all
Description:

Get 8% off with Coupon Code: GolferGeek

FAQs

What is the difference between Mizuno forged and hot metal?
The JPX 921 Forged irons have a smaller clubhead with a thinner topline and sole, less offset, and weaker lofts than the JPX 921 Hot Metal irons. They are also a little more forgiving. 

What handicap should play JPX921 Forged?
I think any golfer with a handicap between scratch and 11 or so can play Mizuno JPX 921 Forged irons. 

Who is the Mizuno JPX 921 hot metal for?
The Mizuno JPX 921 Hot Metal irons are for better mid handicappers and even low handicaps that don't mind bigger clubheads or a little more forgiveness. 

Are JPX921 Forged forgiving?
Yes, the JPX 921 Forged irons are forgiving. Especially for player irons. 

About the author 

Jamie

I'm an avid golfer, a 9.2 handicap on my way to a 2 (been a 5.6) and frequent tester of golf clubs and equipment since 2015.

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