A continuously produced batch of ammunition uniquely identified by a code. Lot size is determined by the manufacturer as part of their manufacturing process.
An adapter that, when installed in a gun chamber for which it was designed, permits a smaller cartridge to be fired in the gun.
The angle formed between a horizontal line and the center line of the bore at the moment the projectile leaves the muzzle of the gun.
The arithmetic mean of pressure measurements for a number of rounds in a single test.
The vertical angle formed between the line of sight to the target and the axis of the barrel bore.
The ring-like space between the top of the primer and the primer pocket or battery cup on the base of a cartridge.
A fastening method of the fore-end of double barreled shotguns which utilizes a spring loaded bolt that extends beyond the tip of the fore-end. A British term.
A metallic element used to alloy lead to increase hardness. Symbol Sb.
An internal metal component in a cartridge primer assembly against which the priming mixture is pinched by the firing-pin blow. See Primer.
A form of metallic sight, front or rear, containing and aperture or disc with a hole. Also called Peep Sight, or Receiver Sight (if mounted on receiver). See Sight Aperture.