Sharky816

Have been working with my golf pro, hitting my 8 iron like 160 or so, but the tragectory is way too high. I am looking to have a lower ball flight. I have a decent swing, good set up and I hit crisp, but way too high. Tried putting the ball back, still too high. He tells me I may need a stiffer shaft. Right now using S300 dynamics. Can anyone give me some advice. I am a 22 Handicap who wants to improve. Is it really the equipment or is it me?