.243 Win.

The .243 Winchester is a popular centerfire rifle cartridge that was introduced in 1955 by the Winchester Repeating Arms Company. It is based on the .308 Winchester cartridge case, necked down to accept a smaller, 6mm bullet.The .243 Winchester cartridge typically fires a 55-105 grain bullet at a muzzle velocity of around 2,700 to 3,200 feet per second, depending on the bullet weight and powder charge. It is a versatile cartridge that is well-suited for hunting varmints and small game, as well as larger game such as deer and antelope, especially at medium ranges.The .243 Winchester is a popular choice among hunters and target shooters due to its flat trajectory, mild recoil, and excellent accuracy. It is widely available in both factory-loaded ammunition and in reloading components, making it a convenient and flexible choice for a wide range of shooting applications.