A single trigger on double-barrel guns which fires the barrels in a fixed sequence.
Archives: Glossary
Glossary custom post type
NOSE
The point or tip of a bullet.
NOTCH SIGHT
An Open rear sight having either a “V,” “U” or square shaped cut on its upper edge.
OBTURATION
The momentary expansion of a cartridge case against chamber walls which minimizes the rearward flow of gases between the case and the chamber wall when the cartridge is fired.
OFFSET MOUNT
A mount for telescopes or iron sights affixed to the gun in such a manner, that the line of sight is to the side and above the receiver or barrel.
OFFSET STOCK
A curved buttstock for use by a shooter who wishes to use the left eye when shooting right handed or vice versa. Also known as a Cross-Over Stock.
OGIVE
The curved portion of a bullet forward of the bearing surface.
OGIVE BULLET
The curved forward part of a bullet.
OIL DENT
A shallow indentation in a cartridge case, generally caused by excessive oil:
a) present in dies during case manufacture
b) in re-sizing dies during handloading operations
c) in a chamber during firing
OILPROOF
The treatment of a cartridge to minimize the entry of oil or water.