What type of ammunition is commonly used in semi-automatic firearms?

Full metal jacket ammunition is commonly used in semi-automatic firearms because of its design and performance characteristics. This type of round features a soft lead core that is encased in a harder metal shell, which helps to improve feeding reliability and stability during flight. Full metal jacket rounds are known for their ability to penetrate targets effectively while minimizing deformation upon impact, making them suitable for training, duty, and general shooting purposes.

Semi-automatic firearms rely on a feeding mechanism that requires ammunition that feeds smoothly and works consistently with the cycling action of the firearm. The smooth exterior of the full metal jacket cartridge aids in reliable feeding from the magazine into the chamber, which is crucial for the functioning of these types of firearms. Additionally, full metal jacket ammo typically offers good accuracy and is favored by many shooters for various applications, including target shooting and self-defense scenarios.

In contrast, shotgun shells are designed for shotguns, cylinder cartridges relate to revolvers, and blank rounds are typically used for training or theatrical purposes, lacking projectile ammunition.