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Three common bullet types are: Full metal jacket (FMJ) commonly used for target shooting and competition. Hollow point (HP) commonly used for self defense. Soft point (SP) commonly used for self defense.

Most modern cartridges consist of four main components the case, primer, propellant, and projectile. A shotgun cartridge, more commonly referred to as a shell, consists of five components the case, primer, propellant, projectile(s) and wad.

Ammunition is generally expressed in a measurement. The measurements in metric are almost always a diameter to length ratio; for example, a bullet in the caliber: 5.56x45mm is 5.56mm wide and 45mm long. 9x19mm cartridge is 9mm wide and 19mm long.

Caliber usually is measured as the diameter of the bore from land to opposite land and is expressed in hundredths of an inch, thousandths of an inch, or millimeters. For example, a . 270-caliber rifle bore measures 270/1000ths of an inch in diameter between the lands and has a larger bore diameter than a .

Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weapons that create the effect on a target (e.g., bullets and warheads).

Bonding By the Book Some bullet makers use what is basically a soldering process, wherein the lead core is melted inside a copper jacket until lead fills the available space and adheres to the copper. Others use an electrochemical process, wherein the jacket is more or less applied to the outer surface as plating.

Wrap in soft tissue paper and seal in a labeled paper envelope or box. Package each bullet separately. DO NOT MARK the bullet or allow it to be marked. Mark the sealed container with a description of the bullet and all other pertinent data.