The New Mizuno JPX 919 Irons Review | GolfBox

Posted by GolfBox on 29th Aug 2018

Mizuno's JPX iron range has been at the forefront of a Tour-led revival of sorts for Mizuno, with a surge in popularity of the Mizuno JPX900 Tour iron among a younger generation of tour pros.
Despite the renewed interest, Mizuno still prefer to let their clubs do the talking. And as results go there really isn't any better recommendation than your irons being used to win three of the last six majors.
Golfing beast Brooks Koepka had Mizuno JPX900 irons in his bag to win this year’s US PGA Championship and US Open, to go with his first major victory in the 2017 US Open. 
And even more telling is the fact that Koepka, who has effectively sewn up a spot in golf's Hall Of Fame with his unbelievable play over the past 18 months, is a free agent when it comes to choosing which clubs go in his bag. Koepka isn’t under contract to exclusively play a brand of clubs; Mizuno irons were his choice because they were the best suited for his game. And another noteworthy mention must go to Ross Fisher, who set a course record 61 at St Andrews last year using Mizuno JPX900 irons.

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All that success points to the new and improved JPX irons becoming the go-to iron on both professional tours as well as down at your local links. The Mizuno factory in Hiroshima, Japan, has churned out some of the sleekest and most stylish irons in recent history, all performing as beautifully as they look. So next up on the Mizuno catwalk is... the Mizuno JPX919 iron range. Mizuno JPX919 irons offer three variants - Tour, Forged and Hot Metal - that are each made from different metal blends to enhance feel and boost performance for different swing types and abilities.


Mizuno JPX919 Tour

The Mizuno JPX919 Tour is the smallest iron in the range and is more compact than its predecessor, the JPX900 Tour iron. 

It’s the type of iron Tour players and low handicappers desire in order to shape shots on demand, with a level of precision elite ball strikers require. While its small head may frighten a few golfers off, the Mizuno JPX919 Tour manages to be incredibly stable. Mizuno testing shows off-centre strikes still carry close to a centred strike, which is critical for the game’s best players. Mizuno have made the JPX919 Tour’s topline thinner to replicate the grinds commonly asked for by Tour pros. The topline has been made 10 per cent thinner, equating to a razor sharp 4.6mm on the 7 iron.

A solid billet of 1025E carbon steel is forged by Mizuno’s patented Grain Flow Forging process, which preserves the natural grain of metals to enhance softness and pure feel – characteristics which Mizuno JPX919 Tour irons have in abundance. The irons get a revised chrome-plated finish that is tougher and radiates an almost pearl sheen. The new brushed finish reduces the reflection and glare emanating from the JPX919 Tour’s crisp lines when exposed to full sunlight out on the course. The Mizuno JPX919 Tour is available in 3-PW, right handed only.


Mizuno JPX919 forged

An emphasis on blending playability and forgiveness makes the Mizuno JPX919 Forged iron the most versatile in the range.

The JPX919 Forged delivers feel and feedback in a streamlined head shape, but offers some mercy through a thinner clubface that is only made possible through the use of an element called Boron.
Now sorry if we’re Boron you, but a tiny amount of Boron is added to the steel billet (1025B) before it gets the Grain Flow Forging treatment and begins life as a Mizuno JPX919 Forged iron. Boron increases the strength of the steel by 30 per cent, which gave Mizuno designers the green light to engineer the Mizuno JPZ919 Forged’s clubface thinner over a greater surface area. 

The Mizuno JPX919 Forged earns the title of Mizuno’s fastest ever forged iron for ball speed. Weight has been removed from the clubface and redistributed to more beneficial areas, making the centre of gravity lower and deeper, and long and mid irons easier to launch.
Another interesting feature of the Mizuno JPX919 Forged is the new stability frame that is on display all the way into the heel on the back of the clubhead. Mizuno say their stability frame technology shores up the clubhead at impact for improved stability, and achieves a better ball flight apex with the lofted clubs for steeper and softer landings on the greens.
The Mizuno JPX919 Forged receives the same pearl brushed finish and is available in 4-GW, both right and left handed.


Mizuno JPX919 Hot Metal iron

The Mizuno JPX919 Hot Metal iron is the sole cast iron in the JPX919 series and is as close as Mizuno gets to a game improvement iron. However, making chunky and unwieldy game improvement irons just isn’t the Mizuno way.

The JPX919 Hot Metal irons are wider and larger than the Tour and Forged models but still retain the refined appearance that Mizuno irons are famous for. The Mizuno JPX919 Hot Metal’s brief is to maximise distance through express-range ball speeds and a ball flight with a steep angle of descent – not low-flying stingers that run forever but aren’t much use when trying to hold a green. 

Mizuno worked backwards designing the Hot Metal by first calculating the required landing angles of each iron before determining launch trajectories and flight apexes that are conducive to soft and responsive approach shots. Made from a hard Chromoly 4140M, a steel alloy containing chromium and molybdenum, Hot Metal irons become more compact as the set progresses. The wedges and short irons are noticeably smaller in head size, with the wedges made from a softer X30 steel and featuring milled grooves for improved control around the greens.

Mizuno realise that an iron has to feel right and sound right. Hot Metal irons get some re-engineered “sound ribs” that sit under the badge, encouraging a solid sound and satisfying feel at impact. Available in 4-GW, Mizuno 919 Hot Metal irons also have the pearl brushed finish and come in both right and left-handed sets.