Recommended for use with large and heavy game, Power-Shok slugs provide better shot alignment and harder-hitting performance in the field. Loaded with Federal's TruBall rifled slug, this ammunition centers the slug in the middle of the barrel providing better down range accuracy. Combined with Federal's reputation for quality and awesome stopping power, this round will give you the results you've been looking for. Designed specifically for smooth bore barrels but can also be used in rifled choke tube barrels or fully rifled barrels.