The .243 Winchester, also known as the .243 Win, is a popular hunting cartridge that was first introduced in the 1950s. It is a versatile round that is used for hunting a variety of game, including deer, antelope, and coyotes. The .243 bullet typically weighs between 55 and 105 grains, with the most common being around 80 grains. This bullet has a muzzle velocity of around 3,000 feet per second, which makes it a relatively flat-shooting round with minimal recoil.

The .243 Rem bullet has become popular among hunters and shooters for its accuracy and versatility. It is commonly used for hunting medium-sized game, such as whitetail deer, due to its ability to deliver high energy and effective killing power at reasonable ranges. Additionally, it is also a popular choice for varmint hunting due to its high velocity and flat trajectory, which makes it easier to hit small targets at longer distances. The .243 bullet has also gained popularity among competitive shooters for its accuracy and consistency, making it a popular choice for long-range shooting competitions.