Specification comparison

Highlighted cells differ between the two sets. Lofts and lies are factory standard.

Lofts compared

What the differences mean

At the 7-iron, the JPX-923 Hot Metal Pro is 28.5° and the JPX-925 Hot Metal Pro is 28°, a 0.5° gap. Each degree of loft is worth roughly 3 to 4 yards of carry at the same swing speed, so the JPX-925 Hot Metal Pro should carry about 2 yards further with that club, on a slightly lower, shallower flight than the JPX-923 Hot Metal Pro. Across the 7 clubs both sets share, the JPX-925 Hot Metal Pro averages 0.3° stronger, with the largest gap at the 7-iron (28.5° vs 28°). The pitching wedges are 42.5° and 42°; the stronger one leaves a 8° jump to a 50° gap wedge, which matters when planning wedge gapping. Beyond loft, the JPX-923 Hot Metal Pro 7-iron sits 0.5° flatter (61.5° vs 62°), which nudges start direction slightly right for a right-hander; the JPX-925 Hot Metal Pro 7-iron is 0.25 inches longer (37" vs 37.25").

The sets are built differently: the JPX-923 Hot Metal Pro runs 4-iron to PW (7 clubs), the JPX-925 Hot Metal Pro 4-iron to GW (8 clubs).

Both are players distance irons, built for roughly 5 to 15 handicaps who want extra distance from a compact head. Forged or multi-material heads that keep a compact look while adding face technology and stronger lofts for distance. Because they target the same golfer, the decision comes down to the specific loft, feel and shaping differences rather than who the sets are made for.

The JPX-923 Hot Metal Pro is listed as investment cast and the JPX-925 Hot Metal Pro as cast multi-material with a thin face and tungsten weighting. The JPX-925 Hot Metal Pro adds tungsten weighting, which lowers the centre of gravity and raises stability on mis-hits, helping the long irons launch.

The JPX-925 Hot Metal Pro arrived 2 years after the JPX-923 Hot Metal Pro, a typical one-generation refresh. Changes over that span are usually incremental: refined face thickness, revised weighting, updated looks and small loft tweaks rather than a new concept. Here the 7-iron loft moved from 28.5° to 28°.

Which should you choose?

The JPX-925 Hot Metal Pro is the stronger-lofted set — up to 0.5° stronger than the JPX-923 Hot Metal Pro on matching clubs. Expect longer carry per numbered iron but a flatter descent angle; gapping at the wedge end is where that shows up.

Both charts are reproduced in full on their own pages: Mizuno JPX-923 Hot Metal Pro specs and Mizuno JPX-925 Hot Metal Pro specs.

Frequently asked questions