Have it examined by a gunsmith
If it was made to shoot steel shot and has interchangeable chokes.
NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Do not shoot steel shot in this weapon.
Not recommended.
You can, but, it will cause a slight bulge in the barrel.
It can, but, damage will eventually happen. Not recommended.
Not reccomended. Older shotguns were made of softer steel, and may be scored by the harder pellets.
The lower the gauge number, the thicker the steel.
There are many gauge steel in a steel garage. It really depends on the kind of steel garage that you have and what kind of steel that you like to you in that steel garage.
Yes it is.
Only with cylinder and improved cylinder choke tubes.
I see no reason that you cannot.The steel shot sould work fine in your ranger model 120 shotgun.
16 gauge steel is 0.0598in. (1.52mm) and 16 gauge galvanised steel is 0.0635 (1.61). The easy way to remember is 16 gauge is 1.6mm