The Definition of Cylindro Conoidal Bullet
Cylindro Conoidal Bullet
A hollow base bullet, shaped so that, when fired, the bullet will expand and seal the bore.
It was invented by Captain John Norton of the British 34th Regiment in 1832, after he examined the blow pipe arrows used
by the natives in India and found that their base was formed of elastic locus pith, which by its expansion against the
inner surface of the blow pipe prevented the escape of air past it.
19 Other Firearms Definitions You Need To Know
The diameter of the bore of a firearm measured as a fraction of an inch.
Although such a measurement may be frequently stated in millimeters.
It is correctly expressed as ".40 caliber" (note the decimal point) or as "10 millimeter"
(without "caliber" or the leading decimal point). Caliber numbers when used to identify the size of the
bullet a gun will file are usually followed by words or letters to create the complete name of the cartridge.
These letters often represent a brand name or an abbreviation for the name of the company that first introduced the round.
A measure of projectiles ability to overcome air resistance in flight.
It is inversely proportional to the deceleration—a high number indicates a low deceleration.
Ballistic Coefficient (abbreviated as BC) is a function of mass, diameter, and drag coefficient. In bullets it refers to the amount that drop over distance and wind drift will affect the bullet.
The portion of the receiver which is threaded so the barrel can be attached to it.
Any piece of clothing that covers the holstered gun. When the gun is worn on the belt, the most common types of cover garments are vests, sweaters, and jackets.
A specialized facility designed for firearms practice.
The amount of change in the bore axis, measured both vertically and horizontally, while the projectile moves from the chamber to the muzzle when it is fired.
A steel ring, around an inch in diameter, mounted to a stud, usually on the left side of the receiver of a carbine,
to which may be tied a leather thong to secure it to a saddle or a scabbard so as not to lose the carbine when riding a rambunctious horse.
The original small single-shot or multi-barreled pocket pistol designed and manufactured by Henry Deringer of Philadelphia.
Derringers (spelled with two Rs) are called that because of the original desinger and anmufactuturer of that
type of gun, Henry Deringer. To get around copyright infringment other designers and manufacturers spell the name with two Rs.
However guns designed and built by Deringer are spelled with only one R
A quick shot taken without deliberate aim.
An offset of a gun stock to the left, so
that the line of sight aligns comfortably with the left eye while the butt of the stock
rests comfortably on the left shoulder. Almost all left-handed shooters benefit from a
little caston and most custom built guns are made this way. The only question is how
much. The caston of a gun is about right when, with the gun comfortably mounted, the
front bead lines up with the center of the standing breech.
A stock offset to the right, for shooting from the right shoulder is said to be
Attribute of a break-open gun whereby the barrels drop down simply by pressing the toplever without muscling them
open manually. The Holland & Holland system utilizes a coil spring within a cylindrical housing mounted just ahead of the forward lump to urge the barrels open.
The Purdey system utilizes residual energy remaining in the mainspring after the gun has been fired.
Both systems enable a shooter to load more quickly when birds are coming fast.
A safety which the shooter must deliberately disengage in order to fire the gun. The most common form of safety mechanism is a
switch that, when set to the "safe" position, prevents a pull of the trigger from firing the firearm.
Co-Witness Sighting is the use of any iron sight mounted onto a rifle that is fitted with an optical sight as a primary sighting system.
They come in two basic configurations, fixed or flip-up. The idea is that if you align your red dot and your iron
sights you have a backup aiming system on the gun.
The part of the trigger mechanism which holds the hammer or striker back. Pressure on the trigger causes the sear to release the hammer or striker, allowing it to strike the firing pin and discharge the weapon.
Expanding the neck of an existing cartridge to make it use a bullet of a different caliber. A typical process used in the creation of wildcat cartridges.
The thumb-piece on the top rear of the hammer that enables it to be manually drawn back to full cock.
Openings at the muzzle end of the gun through which some of the spent gases can escape.
Porting reduces perceived recoil and lessens muzzle rise but increases the noise and flash.
A style of rear sight, typically used on rifles for either slow-moving bullets or for long ranges, whereby a ladder may be raised from
flush with the barrel to a vertical position, and which incorporates a sliding crossbar which may be moved vertically in order to achieve significant elevation.