Overview of 7.62mm Projectiles: The 7.62mm category includes several types of ammunition, each designed for specific firearms and purposes. Notable variants include the 7.62x39mm used in AK-47s, the 7.62x51mm NATO for rifles like the M14, and the 7.62x54mmR employed in Russian firearms such as the Mosin-Nagant.

Characteristics and Usage: The 7.62x39mm projectiles typically feature a 123-grain bullet suitable for close to medium-range engagements. In contrast, the 7.62x51mm NATO rounds, with their 147-grain FMJ bullets, excel in accuracy and penetration for longer-range targets. The 7.62x54mmR rounds, known for their heavier bullets ranging from 148 to 185 grains, offer excellent performance over long distances.