Can someone explain to me what swingweight means for the Irons?
I got fitted for 714 AP2 and my specs were 1" longer, 1 degree upright with D4 swingweight. I probably should've asked the fitter but didn't really pay attention to the D4 part. I noticed on this website, D2 is the standard swingweight so what does it mean that the fitter recommended D4?