Super Field propellant is the propellant of choice for Winchester 20 gauge AA Target loads. Winchester Super Field is an ideal choice to maximize velocities in 12 gauge 1-1/8 ounce and 1-1/4 ounce loads. Super-Field also performs well in 38 Super, 9mm, and 40 S&W pistol loads. It is an excellent propellant for action pistol applications. Specifications and Features: Check your reloading manual or go to a powder manufactures website for load data.