My younger brother has used a Savage BSE 12 with slugs to take deer for decades. The gun is robust, with 30 tubes and mod/full chokes. It has a single non selective trigger that fires the mod tube first. A good thing, the mod choke barrel will consistently put its slug into a pop can at fifty yards. The full choke barrel does not. We dont actually know where that one goes, as it wont hit the thirty inch circle on a web printing stock end at ten yards.
He has taken many deer with the gun. He only loads the mod barrel.
I imported slug guns from France that performed better, but, always considered them a compromise I wasnt interested in.

Best,
Ted