AO
AO is a medium-burning single-base propellant. Identifier: large green flakes. AO is known for its consistent performance and is suitable for a variety of 12-gauge field loads, including some bismuth- and copper-shot applications, as well as loads in 16-gauge and 20-gauge. AO’s performance range puts it in the area of Herco, 800-X, 3N37, and Longshot.