I think I have that exact 20-gauge in my closet. Haven't fired the thing in years and years. Been thinking of making a gun-barrel coffee with it though.
Amazing what we end up doing with those old, little, relics.
It's an old Stevens Savage that I got for my 14th Christmas. It has sentimental value. My brother has one also, we call them scud launchers in honor of their inexpensive simplicity.