The .243 Winchester was initially designed as a target/varmint round. It may be used for animals such as coyote, deer, pronghorn and wildhogs. The .243 was introduced in 1955 for the Winchester Model 70 bolt action and Model 88 lever-action rifles. The .243 has become a popular sporting rifle cartridge. Drawn from premium American-made brass cups, these casing are rigorously tested to ensure unparalleled durability and dependability, each casing undergoes rigorous in-line and postproduction quality assurance testing to ensure a flawless casing.