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Mizuno JPX-850 Irons Review: ClubTest 2015

March 5, 2015

Mizuno JPX-850 Irons


Category: Max Game-Improvement Irons
Price: $800, steel; $900, graphite
4–GW with True Temper XP 105 steel shaft and 4–GW with Fujikura Orochi graphite shaftt
KEY TECHNOLOGIES: The cast stainless steel head has a thin face and undercuts in the sole and topline to increase flex.


PLAYABILITY: The top-rated model in this category; trajectory control is the best of the bunch—these sticks produce a nice medium flight that’s easily managed; good for recovery shots from the rough and around the greens.
ACCURACY/FORGIVENESS: Dispersion pattern is pretty tight; the JPX-850 is predictable on all but the worst hits—shots track to the target when you execute properly.
DISTANCE CONTROL: Tops in the test; can dial in distances almost as though you’re playing a blade; shines on approach shots and is great for flag hunting; mis-hits maintain their distance.
FEEL: The JPX-850 is the best of the bunch; not quite the impact feel of a Mizuno MP better-player offering, but for some guys it’s close to the soft, pleasing sensation of one; you instantly know where on the face you hit it.
LOOK: One of the best-looking sticks in its class; these are max game-improvement irons that could pass as a player’s club; classic look at address with just the right amount of offset.


Not for beginners or guys who need a lot of help—the JPX-850 doesn’t provide the extreme forgiveness or moon-shot launch natural to many of its max game-improvement peers; misses can feel a bit harsh.

BOTTOM LINE: The JPX-850 iron is one of the top-rated models. It offers top-shelf feel and look and provides plenty of distance.

BUY THE CLUB: Get your own Mizuno JPX-850 irons

NEXT REVIEW: Nike Vapor Speed Irons


From the September 2014 Issue of Golf Magazine

Mizuno’s new JPX 850 ($799) and JPX 850 Forged ($1,000) irons are both designed to provide a variety of performance benefits including big-time distance.

The JPX 850, which follows in the footsteps of the previous JPX 825 and JPX EZ, is built with an extremely strong Hot Metal face insert with multiple thicknesses to provide what Mizuno reps say is the highest COR of any iron made today. A new pocket design that reaches deep into the sole and high into the upper area of the clubhead incrementally expands the COR area vertically on the clubface to provide faster ball speeds across the entire face.

To go along with higher ball speeds, the JPX 850 also features enhanced forgiveness due to a “Max MOI Pocket,” which is a back cavity that creates a lower sweet spot (where most recreational players make contact) by featuring more mass in a low and deep area of the clubhead. This design feature also produces higher launch angles and lower spin rates, both key characteristics for maximum distance.

Other features of the JPX 850 include a new “Power Frame,” design that reinforces the cavity for better feel, and an improved acoustical badge in the cavity that provides a powerful, solid sound at impact. Improved playability is provided by a redesigned Triple Cut sole with relieved areas in the heel and toe areas for smoother turf interaction and faster speed through the turf. A two-tone chrome plated finish provides the traditional look normally associated with Mizuno irons, even those that don’t feature forged construction. — Rob Sauerhaft

NEXT REVIEW: Nike Vapor Speed Irons

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