A projectile 360, 460 includes a body having a distal ogive section with external ballistic effect uniforming surface discontinuity (e.g., nose ring groove 369, 469) defined therein to provide an unsupported gap in the ogive profile which affects the flow of air over the front half of the ogive to provide greater aerodynamic uniformity and shot-to-shot consistency with more uniform observed external ballistics and superior terminal ballistics. The bullet's external surface discontinuity feature (369 or 469) creates effects in the flowfield that dominate any dynamic effects from bullet-to-bullet manufacturing inconsistency and resultant differences in dynamic behavior.

A piston/rocket projectile for use within a launcher system having a barrel and method of firing such are presented herein. The projectile comprises a projectile body having a combustion chamber for propellant, a piston moveable to extend out a base of the projectile as a result of ignition of propellant in the combustion chamber, and vents for expulsion of combustion products from the ignition of propellant out of the projectile base after initial movement of the piston. A casing is secured to the base of the projectile body, enclosing the piston and vents prior to the ignition of propellant, and a separable joint is disposed between the casing and the base of the projectile body. Upon ignition of propellant in the combustion chamber, the projectile piston is forced down and the separable joint is caused to separate, leaving the casing in the barrel. After the piston completes exertion of propulsion force, combustion products of the ignition of propellant are expelled through the vents out of a lower end of the projectile and solid combustion byproducts from the ignition of the propellant are collected in the casing.

A lightweight projectile having an integrated metal band positioned around the exterior of the polymer base of the projectile. The metal band may be a driving band that protrudes from the polymer base to minimize the contact between the polymer base and the rifling to reduce friction between the barrel and the projectile as the projectile is fired. The lightweight projectile may be propelled with less propellant force than conventional projectiles of the same caliber while still retaining the ballistic advantages of a spin stabilized projectile.

A lightweight projectile having an integrated metal band positioned around the exterior of the polymer base of the projectile. The metal band may be a driving band that protrudes from the polymer base to minimize the contact between the polymer base and the rifling to reduce friction between the barrel and the projectile as the projectile is fired. The lightweight projectile may be propelled with less propellant force than conventional projectiles of the same caliber while still retaining the ballistic advantages of a spin stabilized projectile.

The present invention provides an ammunition having a metal injection molded projectile and a polymer cartridge case comprising a polymer ammunition cartridge comprising a bottom portion and a top portion that enclose a propellant chamber, wherein the bottom portion comprises a primer recess in communication with a primer flash hole that extends into a propellant chamber and the top portion comprises a projectile aperture; a primer inserted into the primer flash hole aperture; a propellant at least partially filling the propellant chamber; and a metal injection molded projectile frictionally fitted in the projectile aperture, wherein the metal injection molded projectile comprises a nose extending essentially symmetrically to a shoulder, and an essentially cylindrical bearing surface extending from the shoulder to a base.

The present invention provides an ammunition having a metal injection molded projectile and a polymer cartridge case comprising a polymer ammunition cartridge comprising a bottom portion and a top portion that enclose a propellant chamber, wherein the bottom portion comprises a primer recess in communication with a primer flash hole that extends into a propellant chamber and the top portion comprises a projectile aperture; a primer inserted into the primer flash hole aperture; a propellant at least partially filling the propellant chamber; and a metal injection molded projectile frictionally fitted in the projectile aperture, wherein the metal injection molded projectile comprises a nose extending essentially symmetrically to a shoulder, and an essentially cylindrical bearing surface extending from the shoulder to a base.

Provided are methods and related devices for disrupting an explosive device using a propellant driven disrupter (PDD) that propels a rounded projectile (RP) toward an explosive device. The RP travels along a linear trajectory and impacts the target, including a barrier portion of the explosive device. The impacting between the RP and barrier forms a composite projectile via a solid state weld between a portion of the barrier and the RP distal end, thereby minimizing or avoiding spall and fragment generation into the explosive device. The projectile traverses a penetration distance along the linear trajectory, or a defined-angle relative thereto, to disrupt the explosive device without unwanted explosive detonation.

Provided are methods and related devices for disrupting an explosive device using a propellant driven disrupter (PDD) that propels a rounded projectile (RP) toward an explosive device. The RP travels along a linear trajectory and impacts the target, including a barrier portion of the explosive device. The impacting between the RP and barrier forms a composite projectile via a solid state weld between a portion of the barrier and the RP distal end, thereby minimizing or avoiding spall and fragment generation into the explosive device. The projectile traverses a penetration distance along the linear trajectory, or a defined-angle relative thereto, to disrupt the explosive device without unwanted explosive detonation.

Modular cartridges are disclosed that can be initially assembled, disassembled, and reprocessed by hand. The cartridge case is suitable for use with a variety of projectile designs and weights and for use with a range of propellant amounts and primer types. The variety of projectiles and range of propelling forces permits the present invention to provide cartridges for all types of uses, including indoor and outdoor target shooting, training, non-lethal self-protection, and lethal uses. The cartridges include a case, a projectile, a primer, and a selectable amount of propellant (if any), and primer housing insert” and which is configured to be releasably attached to the striking end of the case and to contain the primer and the desired amount of propellant.

Modular cartridges are disclosed that can be initially assembled, disassembled, and reprocessed by hand. The cartridge case is suitable for use with a variety of projectile designs and weights and for use with a range of propellant amounts and primer types. The variety of projectiles and range of propelling forces permits the present invention to provide cartridges for all types of uses, including indoor and outdoor target shooting, training, non-lethal self-protection, and lethal uses. The cartridges include a case, a projectile, a primer, and a selectable amount of propellant (if any), and primer housing insert” and which is configured to be releasably attached to the striking end of the case and to contain the primer and the desired amount of propellant.