Actually now I think of it, Remington did go through a phase and ended up with a run of off bored barrels. There is even an elepitcal choke tube, sort of egg shaped, to help offset such an oddity. In practice it's an adjustable choke tube. Adjustable sights "may" have enough adjustment. And, they may not either. A scope or glass sight such as a red dot is in the same league. Maybe enough adjustment, maybe not. A new barrel might be in order, depending upon how badly you want to keep that particular gun. Regarding peep sights, make sure your aperture, the opening is large. Get something from about .200" upward to .250" for a shotgun slinging large shot for fast movers. That's accurate enough, yet offers plenty of window for the rear aperture to "ghost out" and not be in the sight picture. Learn to shoot with both eyes open and you'll increase your view by twice as much and be quicker. You also maintain the peripheal vision that way.
