Went from hitting high irons well and low irons poorly to exactly the oppisite. My four iron is my best shot. What gives?

[codwater]

I used to hit my wedges, 9, 8, and 7 fairly well. Still had topped balls, hooks, and slices, but for the most part I felt I could trust those clubs. 6,5, and 4 irons kicked my ass. I almost would refuse to hit them it was so bad. Could not hit a fairway, much less get any solid contact.

I took a couple of lessons, and I feel like I undestand the mechanics of my swing, grip, and stance better. When I am at the range I play a game with my irons. I hit each club, starting with my wedges until I hit two solid shots in a row. When I hit the two good shots I move down to the a lower iron. If I hit three terrible shot in a row I move back up to a higher iron. Usually I go back and forth for about thirty minutes before I get to my 4 iron, but once I get to my 4 iron (highest iron in bag) it's game over. I hit 80% of my shots superbly. I am completely caught off guard, and I basically have to tire out or take a break to get back down to my wedges and lower irons. When I get back to those clubs, I fall completely apart. I have a feeling that my lower irons havn't gotten worse, they just haven't gotten better. Although, I do feel like they are worse when I start hitting those after my 4 iron. The whole thing just seems bizzare to me. Anyone experience this? Any ideas why I would hit the lower irons better? I always thought they were supposed to harder to hit.

Also, I guess I should state that I purchased new clubs as well before this started. During my first lesson, I talked to the instructor about the irons I was getting and he said they should work better for me that what I was using (fit wise that is).

[newtogolf]

You should take video of yourself hitting the shorter irons and then longer irons to see if your changing something in address or swing that is causing the problem.  Also you might try altering your practice routine so that once you're warmed up you mix up the order you hit the clubs to force you to work on hitting different length clubs back to back.