A rifle cartridge is a type of ammunition designed for use in a rifle. It typically consists of a bullet, gunpowder, and a casing. The bullet is the projectile that is fired, while the gunpowder provides the explosive force needed to propel the bullet out of the barrel. The casing holds all the components together and is usually made of brass, steel, or aluminum. Rifle cartridges come in various calibers, which refer to the diameter of the bullet. Common calibers include .223 Remington, .308 Winchester, and .30-06 Springfield. Each caliber is suited for different types of shooting, such as hunting or target practice, and can affect the rifle's performance and accuracy.