The Definition of Plus P
Also spelled "+P" or "P+".
Is small arms ammunition that has been loaded to a higher internal pressure than standard for it's caliber.
Many calibers are available in both standard and +p or +p+ variants. Ammunition marked +p produces more power
and higher pressures than the standard ammunition. Not all firearms are designed to handle the increased
pressure consult your owner's manual or gun manufacturer before using +P ammunition.
19 Other Firearms Definitions You Need To Know
The small dished container located on the side or top of a matchlock, wheel-lock or flintlock forearm used to hold the priming powder charge.
A screw with about half of its threading removed in longitudinal sections. Often used at the breech end of a
takedown firearm's barrel. When the barrel's interrupted female threads are inserted into the receiver's
complementary interrupted male threads, only a partial rotation is necessary for assembly rather than many full turns.
Not really a gun at all. During the U.S. Civil War,
both sides would take tree branches or tree trunks, paint them black, and position them so that they appeared to be rifles or artillery pieces.
By doing so, they could fool the other side into believing that they had more artillery than they really did.
An external, manual safety which is typically disengaged with the firing-hand thumb.
Slang word for short barreled revolver.
A firearm designed to fire a single cartridge, eject the empty case and reload the chamber each time the trigger is pulled.
It uses the energy from the fired shot to eject the empty case and feed the next round into the chamber.
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A three-barrel gun.
Typically it has two shotgun barrels side by side on the top, with a third rifle barrel underneath.
This provides a very versatile firearm capable of taking winged animals as well as big game.
It also is useful in jurisdictions where a person is only allowed to own a single firearm.
The distance, or clearance, between the base of a chambered cartridge and the breech face (or bolt face) of a firearm.
This is a critical dimension, particularly in high powered rifles. If there is too little headspace, the bolt will not close.
If there is too much headspace the cartridge will not be properly supported in the chamber and the cartridge will expand upon
firing and may rupture, blasting high-pressure gas into the action and possibly into the body of the shooter.
Headspace should be .003" - .006" in a centerfire rifle. It can be checked with a set of "Go and No-Go"
gauges specific to the calibre in question. (See below.) With a standard cartridge, the headspace is
registered by the shoulder, with a belted cartridge, the headspace is registered by the forward edge of the belt.
A method of building a pair of barrels where the entire breech end of both barrels and the lumps together are machined
from one solid piece of steel. The barrel tubes are then fitted separately into this monoblock and the ribs attached.
Often identifiable by a distinctive ring around the barrels about three inches in front of the breech end.
The favored jointing method of the Beretta company. An incorrect euphemism for sleeved barrels.
The chemical propellant which is burned to produce the hot gases which send the projectile flying downrange.
A condition (status) of a shooting range that shooters may commence to fire.
A malfunction in which the spent case fails to eject from a semi-automatic firearm and blocks the chamber.
As the fresh round is brought forward it cannot enter the chamber. It is cleared by
stripping the magazine from the gun, racking the slide several times to eject the spent case, and then reloading.
A firearm is a portable gun (pistol or rifle), being a barreled weapon that launches one or more projectiles often driven by the action of an explosive force.
As in Trapdoor buttplate or Trapdoor Pistol Grip Cap, one of these articles of furniture including a hinged plate,
covering a small compartment below in which may be stored several extra cartridges, sight bits, extra springs or pins, cleaning rod, etc.
A unit of measure traditionally used for black powder shotgun charges. Today, used for smokeless powders on the basis of the new propellant's
equivalent performance to that weight of black powder. Thus, a shotgun shell marked 3 - 1 1/8
would be loaded with the smokeless powder equivalent of 3 drams of black powder, and with 1 ounce of shot. 1 Dram = 1/16 ounce = 437.5 grains.
Refers to a revolver frame that has no top-strap over the cylinder.
The process of assembling cartridge case, bullet or shot, wads and primer to produce a complete cartridge with the use of
hand tools in the interest of loading for firearms for which cartridges are not available, experimenting with loads
to achieve better performance, or to save money. Not to be attempted without knowledgeable instruction and careful study of the process.
A type of firearm in which the action is closed, with a cartridge in the chamber prior to firing. When the trigger is pressed the cartridge is fired,
and the action cycles loading another cartridge into chamber and when firing is stopped the bolt remains closed and the chamber remains loaded.