The present invention provides a metal injection molded ammunition cartridge comprising a metal injection molded bottom portion comprising a primer recess in communication with a primer flash hole that extends into a propellant chamber and a metal injection molded body extending form the metal injection molded bottom portion.

The present invention provides a metal injection molded ammunition cartridge comprising a metal injection molded bottom portion comprising a primer recess in communication with a primer flash hole that extends into a propellant chamber and a metal injection molded body extending form the metal injection molded bottom portion.

A firearm cartridge system is provided and includes a case with a neck portion, body portion, shoulder portion, a base portion, and a indentation. The neck portion has a diameter between about 0.249 in to about 0.256 in. The body portion tapers from a first end having a diameter between about 0.465 in to about 0.475 to a second end having a diameter between about 0.449 in to about 0.458 in. The shoulder portion connects the body portion and neck portion and has a diameter between about 0.395 in to about 0.405 in. The base portion is positioned on the second end of the body portion and has diameter between about 0.463 in to about 0.477 in. The indentation joins the body portion and the base portion and includes a sidewall with angle between 30° to 42°.

A modified bullet cartridge having a score line formed around a primer bore. The score line may be positioned symmetrically or asymmetrically about the primer bore. The score line may have a regular or irregular two-dimensional geometric shape. A modified bullet cartridge having a counter-bore formed superposed about a primer bore. The counter-bore may have a vertical counter-bore extension and/or a radial counter-bore extension. Adhesive is positioned in the counter-bore about a primer secured in the primer bore. The primer may have a radial flange extending radially from an exterior sidewall of the primer. The flange registers against a bottom surface of the counterbore, or within a radial flange extension if present. Adhesive is used to lock the primer flange against the counter-bore and/or radial counter-bore extension. The combination of the counter-bore, adhesive and optionally the flanged primer locks the primer to the bullet cartridge to render the cartridge unusable after one use. The bullet cartridge is rendered waterproof with the use of the adhesive.

A modified bullet cartridge having a score line formed around a primer bore. The score line may be positioned symmetrically or asymmetrically about the primer bore. The score line may have a regular or irregular two-dimensional geometric shape. A modified bullet cartridge having a counter-bore formed superposed about a primer bore. The counter-bore may have a vertical counter-bore extension and/or a radial counter-bore extension. Adhesive is positioned in the counter-bore about a primer secured in the primer bore. The primer may have a radial flange extending radially from an exterior sidewall of the primer. The flange registers against a bottom surface of the counterbore, or within a radial flange extension if present. Adhesive is used to lock the primer flange against the counter-bore and/or radial counter-bore extension. The combination of the counter-bore, adhesive and optionally the flanged primer locks the primer to the bullet cartridge to render the cartridge unusable after one use. The bullet cartridge is rendered waterproof with the use of the adhesive.

The invention disclosed is an ammunition cartridge case dryer for use in the cleaning, drying and reloading of ammunition cartridge cases. It comprises an upper housing, a base, means for forcing air into a hollow space defined by the upper housing and base, an array of cups or nozzles that are located on the upper surface of the dryer and are adapted to receive a wet cartridge case. The nozzles have apertures in communication with the hollow space such that air can be expelled through said nozzles into said cases for quick drying.

The present invention provides a polymeric ammunition cartridge having polymer cartridge with a metal primer insert having a primer recess and a primer diffuser cup or ring inserted into the primer recess.

The rifle system comprises a rifle and an ammunition round for operation with the rifle. The high pressure ammunition round further comprises a cartridge case having an outer wall wherein prior to firing of the ammunition round, the outer wall geometry of the cartridge case is devoid of features configured for interfacing with a mechanical extractor. The rifle further comprising a barrel chamber which fully supports a chambered cartridge case and a rear extraction mechanism for extracting a spent cartridge case through the rear of the barrel chamber.

A casing for use in a cartridge for a firearm comprises a sleeve portion and a base portion, where the base has cannelure comprised of curving surfaces. In a casing embodiment, a sleeve has cylindrical portion with a mouth for holding a bullet and an opposing end radially-running bulkhead. A nipple extends from the bulkhead and into a passageway of the base, thereby securing the sleeve to the base. The sleeve bulkhead preferably has at least one circumferential wave and contacts a distal end surface of the base, which may be planar or conical. The cannelure is characterized by a continuously curving groove bottom, a maximum groove depth diameter that is 60 to 80 percent of the base outside diameter, and a volume that is 20 to 43 percent of the volume of a like base which has no cannelure.

The invention relates to a cartridge having a projectile, and a case which is mounted on the projectile from behind and which has a case mouth at the front end, wherein the projectile has a tip, and at the rear this tip merges into a circumferential front guide band which defines the outside diameter of the projectile, and directly adjoining this front guide band in the direction of the projectile base, a circumferential case mouth receiving space which extends in the axial direction of the projectile and in which the case mouth engages is situated in the projectile. In order to reduce the twistless freebore to a minimum and build up the gas pressure early during firing, it is proposed that an exposed portion of the case mouth receiving space extending in the axial direction of the projectile is situated between the front guide band and the case mouth; i.e., the case mouth does not completely fill the case mouth receiving space in the direction of the nose of the projectile.