Mizuno JPX921 Hot Metal irons – improvements by numbers

AskGolfNut compares 3 generations of JPX Hot Metal irons

Independent clubfitter Jay Smith (aka AskGolfNut) revealed one of the most comprehensive JPX921 tests to date when he pitted the new Hot Metal irons against 2 prior generations. After hundreds of shots Jay was able to reveal noticeable improvements in both carry distance, peak height and landing angles. A deeper look into the data revealed how marginal gains from off centre strikes were mainly responsible for the overall improvements – skip to 12 minutes for the summary.

Performance numbers compared for JPX921 7 iron, JPX919 7 iron and JPX900 6 iron.

Jay uncovered how the JPX921 Hot Metal delivered gains over its predecessors.

The test backs up the JPX921 Hot Metal’s award for Most Wanted / Game Improvement Irons with MyGolfSpy in its 2020 awards – also driven by deep test data. Read MyGolfSpy awards.

The JPX921 Hot Metal irons have also made their mark in the professional game with Mizuno’s Erika Hara playing them to win the Japan Women’s Open Championship.

The new JPX921 Hot Metal was awarded ‘Most Wanted’ status by MyGolfSpy following its Game Improvement Category testing.

Erika Hara won the Japan Women’s Open Championship with a new set of JPX921 Hot Metal irons.

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