sdandrea1
Bingo. It's all about the center if gravity. Because the modern game improvement irons have a lower center of gravity they've been able to strengthen the lofts while not affecting trajectory.
The G15 6 iron has 29 degrees of loft. The G 6 iron has 27 degrees of loft. I had my G irons strengthened for gapping reasons. So my G 6 iron is now 25.5 degrees. The G 6 iron is now around 8 to 10 yards longer that the G15 6 iron.
Bottom line is it's not what number is on the club. It's knowing how far you hit each club and making sure your gaps between each club fit your game.
I look at my bag as a tool box. For each shot I need to pick the right tool for that shot, regardless of what number is engraved on the bottom of that club.