I use: Graphite shafted steelhead clubs
My swingspeed: between 80-90
Ball positions: Middle for all except driver

My low, sand, pitch and 9 iron go high and far, but all my other irons seem to go pretty far but only mid height. To give you an image... my 8 goes only 1/2 as high as my pitching wedge. I think I make pretty solid contact... Could I be doing something wrong?? I've tried swinging more relaxed to very fast but nothing helped much...