This advanced design from Federal uses a sabot delivery system, as well as locking components within the slug, that allows the slug to remain centered in the barrel for improved accuracy over most other rifled barrel slug designs. The all brass head is intended to aid in extraction, and the blue shell allows for fast and simple visual affirmation that a shell is or is not where it should be. These loads are also low recoil, to allow for more confidence in every trigger pull.