Is there a power leak in my golf swing?

So I was at my local golf retailer and range the other day and ive noticed a loss of distance with my irons and wedges. I was hitting on the launch monitor and my swing speed was an average of 85 with a launch angle of 18 degrees with a 6 iron. Theses numbers seem pretty solid to me but my average carry was only about 160-high 150s. This seems realy short for my ss and lauch angle. Are there any other numbers that can affect distance?
Thanks guys

Is there anything you've changed on your swing at all?

California92 said:

Is there anything you've changed on your swing at all?

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Not really in my swing but i change my posture a bit. i stand more upright with my hands a little higher than before