b0geybuster:
These dots do not accurately define these clubs.
The K15s are amazing irons if you learn how to play them. R11s have always been more popular on WGT because they came out long before the K15s so there is a follow the herd mentality as far as that goes.
Here's the truth about K15s regardless of what the dots say...
Long irons (3and 4i) have a high trajectory and excellent stopping power. This is exactly what you look for in long irons. The 4 iron, with full backspin, will still play from 40-50% rough, but not the 3i.
The 3i, to a level, very fast green, with no wind, with full backspin, will fly 185-188 yards and roll out less than 3 yards (with a Callaway S)
With a centerball hit under the same conditions, the ball will fly 175-180 yards and roll out to 195 - 200 yards.
Mid Irons (5, 6, and 7i) have less stopping power, but still very good., and excellent playability from the rough (with backspin bringing the clubs almost up to their stated yardage in 20-25% rough)
With full backspin, using the same conditions as stated above, the 7i will fly 142 yards exactly and roll out a couple feet. Callaway S ball again...
With a centerball hit, the 7i will fly 138-140 and roll out to 153-156
Short Irons (8, 9, and PW) have almost no stopping power, but you can finesse the ball flight with a combination of backspin and power. Amazing clubs from the rough with backspin! They will fly high and land within 2-5 yards of their stated yardage from 20-25% rough, and they will only lose 5-10% of distance from 25-30% rough.
With full backspin, same conditions as above, the 105 yard PW will fly 104 and roll out to 107. With a center ball hit, it will fly 103 and roll out to 108
Another interesting anomaly with the short irons is their imperviousness (Imperviosity?) to wind ability to stay on line. If you play a lot of St. Andrews or RSG, these short irons just don't get pushed around as much other irons.
These irons are both more accurate and less forgiving than what the dots tell you.
More accuracy with dinged shots. If you ding these irons, they are going where you tell them to go. Every time. Play with some other irons and you'll find this isn't always true.
If you miss the ding by more than a hair, the ball can wander off quite a bit, but if you miss the ding by a lot, it doesn't get a ton worse.
The upside to all this is the easy ability to hit the ding. The meter is so slow, you can get up and make a sandwich, then sit down, send your mother an email, then get back to the game in time to hit the ding.
These irons got me to legend and I'm not sure I'm getting rid of them any time soon.
My advice is buy that extra 10 yards with another driver or 3w, but learn to play the K15s, they're the most underrated irons on WGT.
Edit:
Just wanted to add that I also use a 90 yard (56 degree), 75 yard (60 degree), and 60 yard (64 degree) wedge.
Learning how and when to punch a wedge is vital to your success, as bogeybuster alluded to, but I disagree (respectfully) on only using 2 wedges.
Inside 100 yards is where you want all the options you can get. If it was possible, I would get rid of the K15 PW and go with 100, 90, 75, and 60 yard Pings.
That combination would give me full swing and punch, with centerball and backspin options at: 100, 95, 91, 90, 85, 83, 79, 75, 74, 68, 62, 60, 58, 52, 49, and 46 yards.