You can shoot leaded shot and slugs. Steel shot isn't allowed due to the risk of fire.
No, however ignore the ignorance of the gentleman below, Mr. Santos. If you wanted to call and ask they may alow slugs as well a shotgun does take skill to shoot skert and skill to shoot slugs.
Eric. Google doesn't have that answer..And this forum your asking is not monitored by Hole in the wall. Mainly you will see hand guns. And other low velocity rounds. Seriously shotguns @ an indoor shooting range!. A shotgun doesn't take skill to shoot. Go out to the country and shoot at the dirt.
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