I live in slug country. Hundreds of thousands of lead "foster"-type slugs have been shot out of hundreds of thousands of shotguns with full chokes with no effect whatsoever on the choke. The fosters were designed to be shot out of any barrel. While the accuracy may not be anything to write home about, there will be no damage to the gun. Saboted slugs are designed to be shot out of cylinder-bore or rifled barrels and are another matter.