Recently I made the switch from True Temper Dynamic Golf shafts, which I had been playing ever since I can remember, over to the Project X shafts that you see many of the tour players using these days. I couple years ago I purchased a set of Nike irons which came with Project X's installed and I instantly hated them. I don't know if they just weren't the right stiffness for my swing, but they had an absolutely horrible ball flight and I couldn't control them to save my life. It was with mixed feelings that I decided to give the Project X's a try again, but after using them for several weeks in a new set of Callaway irons, I can say that I wish I had made the switch earlier.
First off, I've found that in comparison to the True Temper X100's, the Project X shafts play slightly stiffer. I first tested the 7.0 stiffness, which is the stiffest Project X shaft. While I liked the ball flight, which was very penetrating, I lost a bit of distance across most of my irons. I figured the 6.5's would probably be the right fit, so I gave those a try and immediately found that they still had a nice mid launch trajectory, but they also got me back to my normal iron yardages, if not a slight increase. While True Temper touts all of their standard Dynamic Gold shafts to be low trajectory shafts, I've never managed a low ball flight with them. They were generally the exact opposite, with a very high, if not ballooning flight.
What I particularly liked about the Project X shafts is that they are considerably lighter than an Dynamic Gold X100, which I'm finding that I prefer. I know many golfers like the feel of a heavier shaft and this aspect really comes down to personal preference, but I can definitely see better performance for my game with the lighter shaft. I haven't checked to see if it's given me any increase in club head speed, and it's probably minor if anything, but even a one mile per hour speed increase would help with distance.
I stayed away from the flighted version of the Project X's as they are aimed to help to increase ball flight on the low to mid irons. I've never had an issue with getting those clubs up in the air, so I opted for the standard shafts. For those of you who struggle with those irons, I would definitely recommend trying the flighted version. I did test them in a 3 and 4 irons and they will aid in getting a higher ball flight if you need it.
Overall, I found the Project X shafts to be an excellent compliment to my game. While they are a bit pricier than some of the other shafts on the market, at around $35 per shaft, the extra money spent is well worth it. If you're thinking about getting fitted for a new set of irons, I would definitely have your fitter let you try the Project X line and see how they compare to your current shafts. They're available in 5 stiffness variations, with 2 stiff versions and 2 Extra Stiff models to choose from.