Kevin I'll make 1 suggestion - go to that instructor yourself too this Aug.
On shotguns you point it, you don't aim it on flying targets. And that's why VG rifle guys can be poor bird gunners, and vice versa, The 2 disciplines contradict each other.
Gun fit is #1.
For myself for example: 90+% of the guns do not fit me as there is a gap between the rear and front sight - meaning that I will shoot high - that's a helluva handicap and a miss every time on crossing shots. Most factory shims do not correct it enough for me. For example on Citori's there is a hug gap between the sights, When I shoulder it and look down the vent rib it looks like an airplane landing runway when on approach
I've seen guys piss away $$$$'s on guns and they keep on buying as they can't shoot well.... If a $2k gun does not fit you, you will not shoot well. Conversely a beat up $300 gun that does fit you, you can shoot well.
It's like you want to learn to box, but 1 hand is tied behind your back. So how good can you be? As the poor fit of the gun is what is tying the hand. Get a well fitting shotgun - NOW you have the opportunity to learn to shoot better.
Fit. Fit. Fit.
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God, help me be the man that my dog thinks that I am.