Any shotgun slug ammunition from a SAAMI member ammunition manufacturer. We suggest Sabot slugs with our rifled barrels. Our Sabot Express choke tube allows you to shoot Sabot and Foster-type slugs through any Browning shotgun with back-bored barrels. We also have a Standard Invector rifled choke tube that allows you to shoot Sabot and Foster-type slugs through any Browning Standard Invector barrels.