Both, but the Higgins is an early/mid fifties gun. Early steel loads could bulge an older barrel with choke tubes. Not sure about today's steel loads. Hate to take a chance since this is an inherited gun.

A single bismuth shell costs about as much as a Costco roast chicken. Thinking about buying a service jacket for my Brittany, then letting her come into Costco with me to help pick a chicken out of the hot case.