The major diameter in a barrel which is the diameter of a circle circumscribed by the bottom of the grooves in a rifled barrel.
Archives: Glossary
Glossary custom post type
GROUP
A series of consecutive shots fired at the same aiming point without changing the sight adjustments of the firearm.
GROUP SIZE
The determination of the statistics of a particular group. Examples of measurements include Extreme Spread, Mean Radius, Vertical and Horizontal Extreme Spread, to name a few.
FOLDING SIGHT
A front or rear sight that can be folded down.
FOLLOWER
That part in a firearm which, through the action of a spring, forces a cartridge or cartridges to move.
FORCING CONE
1. The tapered leade from the shotgun chamber diameter to the bore diameter. 2. The tapered leade from the bore diameter to the choke diameter. 3. The tapered entrance to the bore in the rear of a revolver barrel.
FOREARM
Traditionally, the forward part of a two-piece stock. Sometimes called a Fore-end.
FORE-END
Traditionally, the forward portion of a one-piece stock. Sometimes called a Forearm.
FORE-END LUG
A protrusion found on the bottom of the barrel(s) (or lower barrel in over/under firearms) that serves as the attachment point of the fore-end. Typically associated with top-break action firearms.
FRANGIBLE BULLET
A projectile designed to readily break up upon impact on a hard surface in order to minimize ricochet or spatter.