This is Prvi Partizan .375 H&H Mag 300gr Full Metal Jacket Ammo. This ammo is manufactured by Prvi Partizan in Serbia. Prvi Partizan FMJ Handgun Bullets are general-purpose bullets suitable for autoloading pistols. They provide excellent cartridge feeding into the weapon chamber and have good penetration. These bullets are a good choice for practice shooting. The Prvi Partizan Ammunition plant manufactures ammo for military use around the world, and is well known for their superior quality ammunition. It is brass cased, boxer primed and 100% non-corrosive. It comes packed in 20rd boxes.