@kevin If your draws are truly push-draws and are not starting at or to the pull side of the target line (i.e.: pull hooks), then it could be a matter of a swing speed that is not fast enough for the shafts in these clubs.
Otherwise, it's likely related to a face that is too closed at impact, and this can occur due to a variety of reasons, including (but not limited to):
1) The face is aimed at address (I know - "duh, Tom...", but the brain can play tricks on us from that angled side-on perspective). Place an alignment stick on the target line and another crossing it 90 degrees to represent a clubface that is square to the target. Place a ball down immediately ahead of the 90-degree line and address it. How does the face look to you - open, closed, or square. For the stock push-draw shot shape the face should be open to the target line and closed to the proper in-to-out downswing path.
2) Your grip - or a combination of the grip and the butt end of the club being too low at address - can be closing the face. This would typically cause the ball to start at or to the pull side of the target line and tumble further to the pull side in flight.
3) If the hips stop their lateral slide prior to impact, the swing center drifts backwards, rerouting the path and accelerating the rate of face closure.
4) Flipping or rolling the hands through impact can close the face. Keep your "flying wedge" intact!
These are the most common reasons for low ball flight. If any of these - aside from the equipment issue - look to be the culprit, then there are appropriate drills/fixes in the school, or you can always arrange for a V1 Video Analysis so I can put my eyes on your swing and provide a more specific diagnosis and recommendations.
@kevin - With the exception of thin/skulled shots, low ball flight is typically the result of either a swing speed that is too slow for the club being swung or a closed clubface at impact. Is impact solid or does it tend to be thin? What is the ball's starting direction and curvature?
Yes, definitely.
Actually pretty solid, tend to draw or hook. I'm ok with it usually but sometimes hard to hold greens on mid to long irons.
@kevin - With the exception of thin/skulled shots, low ball flight is typically the result of either a swing speed that is too slow for the club being swung or a closed clubface at impact. Is impact solid or does it tend to be thin? What is the ball's starting direction and curvature?