Hitting long irons fat is a common problem for golfers of all skill levels. If you find yourself chunking your long irons, there are a few simple fixes that can help. Grip First, check your grip. A weak grip will cause the clubface to open at impact, leading to a fat shot. Club Selection Second, make sure you are using the correct club. If you are struggling to hit your long irons, you may be trying to use a club that is too long for you. Practice Finally, take some time to practice your swing. A smooth, controlled swing will produce better results than a choppy, hurried one.