This term refers to a specific type of shotgun ammunition designed for recreational shooting. Typically, it signifies a 12-gauge shotshell loaded with approximately one ounce (or 1 1/8 ounce) of lead shot, or a similar weight in steel or other shot types, propelled to a velocity suitable for breaking clay targets or other target shooting applications. Such loads are common and widely available, often sold in quantities of 100 rounds per box.
The designation of this ammunition type reflects a balance between manageable recoil, effective target-breaking performance, and cost-effectiveness. This balance has contributed to its popularity among both novice and experienced target shooters. Historically, these types of loads have played a significant role in the development and popularization of various clay target shooting disciplines, such as trap, skeet, and sporting clays.