You have a Remington Model 11. Don't let the age fool you--it is one FAST cycling shotgun.
I have one where someone cut the barrel off at 19". I mounted a magazine extension on it, and now use it for shooting clays. It points nicely and that gun will break clays all day long. My next step is to install a compensator on the end.
One tip: To ensure proper cycling and feeding, replace the magazine spring with a good new one. Also, I would not shoot slugs or buckshot--unless you like pain.
Hiding in plain sight...