62grain

62grain is a term commonly used in the context of ammunition, specifically for rifle cartridges. It refers to the weight of the projectile, or bullet, measured in grains. A grain is a unit of mass, equivalent to approximately 0.0648 grams. Therefore, a 62-grain bullet weighs about 4.02 grams.

This particular bullet weight is frequently associated with 5.56x45mm NATO ammunition, which is the standard service cartridge for many modern military rifles, including the M16 and M4 carbine. While lighter (e.g., 55-grain) and heavier (e.g., 75 or 77-grain) bullets are also used in this caliber, the 62-grain option offers a balance of ballistic performance. It generally provides good accuracy, penetration, and terminal ballistics for its class.

A common type of 62-grain bullet is the "green tip" M855 ball round. This designation refers to the paint marking on the bullet's tip, which signifies a steel penetrator core designed to improve its ability to pierce certain barriers. The M855 round is widely used by military forces and is also available in some civilian markets, though regulations may vary. The 62-grain weight is a critical specification for handloaders and ammunition manufacturers when developing or selecting loads for various firearms chambered in 5.56mm or .223 Remington.