First, a disclaimer. I am not, nor have I ever been an employee of Callaway Golf. In fact, over the decades that I have played golf I have only owned a handful of Callaway clubs. Never a set of irons. That said, my interest was piqued a few days ago when I happened to check the head weight of a Callaway Black Series Tour Design putter and it weighed exactly 350 grams. On a digital laboratory scale that is accurate to 1/10 gram. So, I was curious whether this was a fluke, or representative of perhaps very good quality control.

Yesterday I received a set of X-Prototype irons that I had ordered standard lie, loft and length. If you don't know what they look like, here's a picture - suffice it to say that Phil Mickelson and Ernie Els play these.