125grain

125grain is a unit of mass, commonly used in ammunition. It refers to the weight of a projectile, typically a bullet, in grains. A grain is a unit of mass derived from the weight of a grain of barley or wheat. One grain is approximately equal to 0.0648 grams. Therefore, a 125-grain bullet weighs about 8.1 grams.

The 125-grain weight is frequently found in handgun cartridges, most notably the 9mm Luger and the .357 Magnum. In 9mm Luger ammunition, 125-grain bullets are often used for self-defense and target shooting, offering a balance of penetration and stopping power. In .357 Magnum, this weight is also common and contributes to the cartridge's reputation for significant energy and recoil.

Ammunition manufacturers produce 125-grain bullets in various constructions, including full metal jacket (FMJ) for target practice and economy, jacketed hollow point (JHP) for expanding upon impact, and soft point (SP) for controlled expansion. The velocity at which a 125-grain bullet travels will vary depending on the specific cartridge and firearm, influencing its trajectory, energy, and terminal ballistics. The selection of a 125-grain bullet is often a consideration for shooters seeking a specific performance characteristic for their intended application.