Years ago I shot with a fellow who bent his barrel up to move the point of impact three foot high at 21 yards. He claimed he had a eye problem and if he shot in line with the bird his shot would be three foot low every time. Truth is he had a habit of pulling the gun off his shoulder when he shot so I do not know what his sight picture was. It was almost a flinch the way he shot. Funny thing was he could shoot a .410 42 with a straight barrel and shoot respectable scores. Maybe he should have owned the up-bent Fox. I have seen trap shooters bend barrels to change POI years ago. There are a lot of squirrel(y) gun owners out there.