Mizuno found golfers with swing speeds at 73 mph and below, on its Shaft Optimizer, benefit from more loft, especially in the long irons. With JPX 923 HL, the 5-iron is 25 degrees — Hot Metal ...

I don’t dive too deeply into loft/lies ... last year’s three Mizuno Pro models. The three more game improvement models (JPX 923 Hot Metal Pro, Hot Metal and Hot Metal HL) were released ...