Re: Question about Interarms/Rossi Squire .410 SxS
You can shoot damacus steel barreled guns. Take it to a competent gunsmith and have it checked out for rust at the hammer welds and if it is ok you can use low preasure ammo in it. If it is damacus you should see the pattern design on the barrel. These guns were imported by Interarms, I am not so sure they were still making damascus barrels in the 60s.
When you are up to your butt in alligators, it is hard to remember your intent was to drain the swamp. Stay focused!