The late Gene Hill, in his Shotgunners Notebook had this to say on the subject:
"...in my opinion the perfect shotgun is one that I'm entirely unconscious of; it is merely a place to put two shells. I don't see barrels, I don't feel stock--it's part of me, like pointing a finger or, simpler, just looking. And that's the secret here: just looking. As simple as it seems, a vast number of gunners sight down the barrel instead of looking at the bird. Let me assure you, you can't do both and be a good wingshot. You must ignore the gun and look, and look hard, at the target--and wherever you eyes go, the gun barrel will go all by itself! Doesn't that sound easy? It is and it works."
My instructor at the Remington Shooting School broke me of the habit of aiming by forcing the barrel on my gun through the bottom of a Dixie Cup, then sliding the Cup up until its open end butted up against the forend. He then secured it there with electrical tape. This obliterated my view of the barrel and forced me to LOOK AT THE TARGET, just like Gene recommended.
Know what? It DOES work! Leave the Cup in place until your scores improve. Your squad mates may laugh (at first), but who cares if it helps you achieve your goal of being a better wingshot?
Try this on your own gun and see if it helps.
Good luck, and good shooting!