| anvil contained
in the primer. A fixed metallic point against which the priming mixture is crushed and
thereby detonated by the action of the firing pin. bearing
surface that portion of a bullets surface that touches the bore when moving
through the barrel.
bell to expand the mouth of the case slightly
in order to seat a bullet easily.
Berdan primer type of primer with no
integral anvil. The anvil is formed in the bottom of the primer pocket. It is common in
Europe on military cartridges. It is difficult if not impossible to reload. Identify by
viewing the empty cartridge from the top. If you see two flash holes, throw the case away.
Boxer primer the standard American
type of primer. When viewed from the top of an empty cartridge case, one flash hole should
be seen. This is the one to reload.
bullet the missile only. It becomes a
projectile in flight. It may be of the jacketed or cast lead type.
bullet seating inserting the bullet into
the cartridge case to the correct over all length (OAL) of the completed cartridge.
caliber approximate bore or groove diameter
expressed in decimals or metric, for example: .308 or 10mm.
cannelure groove around a bullet or
cartridge case. It is used to hold lubricant, or to crimp case into.
cartridge a complete unit of ammunition
assembled. The complete unit is comprised of : cartridge case, propellant, powder,
primer, and bullet.
case trimming the trimming of a
fired rifle case back to its original over all length. Note that the trimming of straight
walled cases is unnecessary.
chamber the part of the bore, at the breach,
machined to accept and support the cartridge.
chamfer to ream a taper on the inside of a
case mouth to assist in seating a bullet.
crimp (roll or taper) the bending inward of the
mouth of a case in order to grip the bullet. |
|
crimped
primer a forcing inward of the brass around the top of the primer pocket to
prevent the primer from backing out. It is usually found in military cartridges. Crimp
must be removed to allow you to insert a new primer. Call Dillon or visit our online catalog for information on our Super
Swager. decap to push out a primer from the primer
pocket with the decapping pin in the sizing die.
expand to open rifle and pistol cartridge case
mouths to the proper diameter needed to hold the bullet firmly. Not to be confused with
"belling".
flaring see bell.
flash hole the hole leading from the primer
pocket into the cartridge case.
headspace the distance from the bolt face to
that point in the barrel or chamber that stops the cartridge from moving further forward
into the chamber.
Rifle - cartridge rim, belt or shoulder. Handgun - cartridge mouth of the case
or rim.
leading lead deposited in the bore from shooting
swaged lead bullets. Hardcast bullets will not cause leading in pistols.
neck size to resize the neck on a rifle case.
For rifle cases only.
over all length (OAL) the distance from
the tip of the bullet to the base of the case.
ogive the rounded portion of the bullet ahead of
the cylindrical section. Also the radius of the curve ahead of the bearing surface.
oil dent dent in the case formed by having too
much oil or lubricant when sizing.
primer pocket the portion of the cartridge
case that contains the primer. Note: It is not necessary to clean primer pockets
on modern ammunition. This practice is a carry over from the old corrosive primer days.
resize to return a fired cartridge case to
its original dimensions by its insertion into a resizing die. Note: resizing does
not compensate for the stretching of a rifle case when they’ve been fired. See case trimming. |
