Yes
I see no reason that you cannot.The steel shot sould work fine in your ranger model 120 shotgun.
A shotgun can shoot up to 80 yards it it depends on what the choke is on the gun.
Depends on the load and what the maker of the choke/shotgun say.
No.
Yes your Winchester model 1897 pump action shotgun can shoot buck shot through it.
Yes, but, DON'T DO IT!!!!!!!!
Not recommended.
Not recommended
Pellets or slugs. shotguns usually shoot shot or pellets, but you can shoot slugs. in Indiana we use a shotgun to hunt deer and use shotgun slugs, better to use a barrel with no choke in it. cylinder bore preferred.
Cylinder to Full depending on what discipline you are into.
yes for a shotgun you need a rifle barrel DO NOT shoot slugs if you have a poly-choke!
Never fire a shotgun without a choke tube installed. DANGER, DANGER, DANGER