Without seeing a video it is speculation, but here are 3 things to check: 1. The "right" shots... your body is out racing your arms/club and they're behind and the face opens. This also can be that your front elbow starts pointing at the front hip (correctly), but on the downswing at impact it is pointing at the target (opens the face). Or, your hands flare the face open on the backswing and you don't get it back to square by impact. 2. The "left" shots... Your hands are closing the face just before impact trying to not go right. Or, your body quit rotating and the arms/club pass the body pointing the face left 3. The "fat*, thin, slice, hook" shots... you know (even without looking) at your swing I can almost tell you the reason you’re struggling with longer clubs is your hands. You feel the need to help through impact. Sometimes it is the arms, but “they” both need to maintain their setup shape through impact. You MUST feel the back of your front wrist flat (or even bowed out a bit) through impact. Also the elbows must stay close together and another MUST is that the front elbow MUST point back at the front hip through impact… if it is pointing at the target, you’re in trouble and you will have to flip to save the shot or it will block/right/shank etc. This will give you a couple of things to check. Remember… the body must continue rotating through impact bringing the arms/club around to the left (right hander). * FAT SHOTS: Sometimes fat is that you're sliding off the ball towards the back foot and don't get back and so you hit behind. Can also happen if you stop rotating and the arms take over. Check your elbows... must start close together and stay close together during the swing. If they're apart at setup, they can elongate and lengthen the radius causing a fat shot. Your chest can be dropping during the downswing causing a fat shot.
Move Less ... Get Good! DUPLESSISGOLF