I've got 5 at the moment (P, U 50 degree, 52, 56, 60), mainly because I recently purchased a new iron set with the U wedge.
I need to get 54 and 58 to replace the last 3 wedges.. but for some reason, my yardages are weird with my 50 degree.
Full Swing - 50 goes 95 yards while my 52 goes 100 yards. Maybe it's the way I'm swinging things or the shaft.. but can't figure out what the right gapping is.