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Mizuno JPX-850 Irons

The breakthroughs in distance and ball speed of the JPX-850 are achieved through Mizuno’s Power Frame design, which greatly increases the rebound area of the clubface. In addition, the Power Frame positions weight in the extreme corners of the club head to increase stability on off-center shots, maximizing forgiveness and consistent distance.

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Description

JPX-850 Iron Set

The Longest Iron in Golf.


The breakthroughs in distance and ball speed of the JPX-850 are achieved through Mizuno’s Power Frame design, which greatly increases the rebound area of the clubface. In addition, the Power Frame positions weight in the extreme corners of the club head to increase stability on off-center shots, maximizing forgiveness and consistent distance.

Equally as important, the innovative Power Frame design ensures ball speeds are consistently high across the entire clubface and that the high COR is not created at the expense of feel or control. The JPX-850 delivers more distance, with more solid feel than any other iron in the game.


Key Technology

  • Power Frame Distance: Increases rebound area for maximum distance.
  • Power Frame Forgiveness: Weight is strategically placed in the four corners of the cavity to maximize forgiveness.
  • Dual Relief Zone Sole: Ideal turf interaction for solid ball striking in all course conditions.


Standard Steel Shaft: True Temper XP 105 – R300, S300
Standard Graphite Shaft: Orochi Graphite
Standard Grip: Mizuno M-31 360 .58 Round

“Simply increasing ball speed is not our goal - making it happen within a manageable head size is the real challenge. With the Power Frame we were able to take ball speeds to a completely different level - all while keeping it hand in hand with a nice feel and a level of workability.”
-Tetsuya Kanayama, Senior R&D Team Member

Reviews

Expert Review

Mizuno JPX-850 Irons Expert Review

Written By: Bob Gomavitz

Player Stats:
  • Age: 57
  • Handicap: 4.6
  • Years Playing Golf: 45
  • Being an absolute equipment junkie, I was approached by GolfDiscount.com to write reviews and share my findings with you. Having been chosen to write a number of Taylormade product reviews for GolfWRX.com I felt that this is an excellent opportunity to put my knowledge to use.

author-bob-gomavitz


The Takeaway

The JPX 850 features Mizuno’s Power Frame Technology. To increase forgiveness, the Power Frame Technology distributes the weight to the 4 corners of head. The Dual Max Cor Pocket offers an increased rebound area for max distance. Add in their thinnest-ever, multi-thickness face for higher ball speeds and you have one hot head! The sole offers players a dual relief design for solid ball striking.

Who's It For?

I would have said in the past that Game Improvement irons are more for 18+ handicappers. Purists most likely will still walk by this section in the stores, but so be it. Now, pretty much any type of player can play this class of Game Improvement irons without hesitation, and there is one main reason. What held back the better players in previous years from using this class of iron was the hot spots, or jumpers as they’re called, which creates inconsistent distances from the same club number. The OEM’s have done a fabulous job correcting this issue with better technology in head and groove design.

Final Take

Looking at the Mizuno JPX iron, I see a gorgeous club head with a clean, simple design that makes sense to me. The head produced consistently solid shots, and without any “clicking” noises that I’ve heard from a friend’s older JPX heads. The sole is on the larger side, but this provides the beef behind the the face to support its thin design. The ball flight was true and tight, not too high, or too low. Cosmetically, the high polished appearance with some satin finish really looks good. Adding in the JPX blue colorway to the damping badge, and you have one great looking and forgiving head.

Club Tested: 6-Iron; Shaft: C Taper Lite; Loft: 28°

Read the 2015 Game Improvement Irons Guide

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