Mizuno JPX 923 Hot Metal

Independent robot testing: ranked 5th overall and #1 in accuracy with the strongest strokes-gained accuracy in the field; 8th in forgiveness in the 2023 Game Improvement category. Editorial coverage: the long irons are slightly easier to hit than the predecessor. The 4335 Nickel Chromoly construction (35% stronger than predecessor's 4140M Chromoly) plus a 18% wider sole base widens the effective hitting zone. Forgiveness regressed vs the predecessor (which won the prior year outright), but accuracy gains compensate.

Independent robot testing: ranked towards the bottom for distance in the 2023 GI category — strokes-gained distance was the weak spot in the robot test. Reviewer testing: elite ball speeds and smash factors with ball speeds reaching 130-135 mph 7-iron in higher-swing-speed testing. 4335 Nickel Chromoly enabled an 8% thinner clubface vs predecessor. 7-iron loft 28.5° (0.5° stronger than predecessor's 29°). Editorial coverage: face is slightly thinner than the previous faces, meant to deliver faster ball speeds, but clubs play to the same distances as the predecessor in normal use.

V-Chassis and Deep CG design improve trajectory consistency and controllable landing angle. Reviewer testing: intelligent spin production creates meaningful distance gaps — controllable trajectory and spin profile. Still a game-improvement iron with strong lofts (28.5° 7-iron) and toe-bias weighting — cap on absolute shape-shifting ceiling. Not meaningfully more workable than the predecessor.

Reviewer testing: firm, satisfying thump in the hands in short irons; sound/feel rated among the best in the category. Editorial coverage: the sound/feel is the same and best in the game vs the predecessor. V-Chassis design delivers a consistent vibration pattern tuned through Harmonic Impact Technology — a step up from the predecessor's earlier design. The 4335 Nickel Chromoly face flex contributes a measurable hint of pop on solid strikes that the predecessor's material lacked.

Reviewer testing: firm, satisfying thump that gets a touch louder as you move into the longer irons. V-Chassis with Harmonic Impact Technology delivers a more solid, satisfying vibration pattern. Reviewers consistently rate the acoustic better than the predecessor — the V-Chassis architecture is the key delta. Editorial coverage: sound/feel is the same and best in the game — quieter and more refined than typical GI peers.

Reviewer testing: prototypical game-improvement looks with offset that is nicely shaped. Editorial coverage: looks great at address for confidence. Long irons retain the larger profile but the scoring irons have been refined for slightly more compact aesthetics vs the predecessor. Still firmly in the GI category — looks thicker than a players or players-distance iron.