A novel castable frangible projectile and techniques for manufacturing such are provided. A cartridge system includes a case defining a volume, a propellant disposed in the volume of the case, and a projectile coupled to the case. The projectile includes a body disposed at least partially within the case and configured to enclose the propellant within the volume of the case. The body is formed of a castable eutectic mixture, the castable eutectic mixture configured to be melted and cast, wherein the body is configured to break into a plurality of fragments upon impact with a target.

The present invention discloses a bullet with a negative Poisson's ratio effect and a method of designing thereof. The bullet includes a cylindrical section of the bullet having a negative Poisson's ratio design, and a conical tail of the bullet and a tip of the bullet each with a matching design; the cylindrical section of the bullet is a tubular structure having periodically alternating transverse and vertical holes; the tubular structure includes a plurality of holes, with a center axis of one hole being axially perpendicular to a center axis of another adjacent hole, that is, the axis of each hole being structurally orthogonal to an adjacent hole; and the holes in rows and columns are periodically arranged into the tubular structure, which is a tubular structure having the negative Poisson's ratio effect.

A rifled barrel has a cylindrical channel longitudinally extending within the rifled barrel between an oppositely oriented muzzle opening and a breach opening, the cylindrical channel having a rifled portion and a non-rifled portion, the rifled portion having a land and a groove helically extending along a surface of the cylindrical channel from the muzzle opening toward the breach opening, the non-rifled portion being smooth and having a consistent diameter along a length. The diameter of the non-rifled portion of the cylindrical channel is equal to a diameter of the rifled portion measured between oppositely oriented sections of the groove. A transitional section of the rifled portion has a diameter measured between oppositely oriented land sections that gradually decreases along a section of the rifled portion adjacent to the non-rifled portion until equaling the diameter of the non-rifled portion.

A projectile for loading into a rifled barrel includes a casing having a cylindrical body, a forward aerodynamic end, and a free end opposite the aerodynamic end, the cylindrical body of the casing defining an interior cavity extending to and in open communication with the free end. The projectile also has a bullet sized to initially slidably engage the casing along a partial length of the interior cavity through the free end. Upon discharge of propellant, the bullet is forced to slidably engage the casing farther within the cavity, preferably such that an entire length of the bullet is housed within the casing cavity, whereby a circumference of the casing is increased such that the increased circumference of the casing catches barrel rifling of the muzzleloader rifle. This allows a smaller caliber bullet to be used in a fouled barrel, while increasing accuracy of the muzzleloader rifle.

A double impact bullet with internal hammer and stabilization post.

A double impact bullet with internal hammer and stabilization post.

Muzzleloader systems include a pre-packaged propellant charge and primer for providing efficient loading and unloading of the muzzleloader. The muzzleloader accepts in the breech end the propellant containment vessel that abuts against a constriction portion with a reduced diameter portion. The propellant containment vessel having an end portion with a tapered surface that conforms to the constriction portion surface. A projectile is inserted in the muzzle end and seats against the constriction portion. The propellant containment vessel may be received in a removable breech plug. The constriction portion may be part of the breech plug or a separate component secured in the barrel by way of the breech plug. The containment vessel further comprises a primer mechanism that may be integrated into the proximal end of the containment vessel.

Muzzleloader systems include a pre-packaged propellant charge and primer for providing efficient loading and unloading of the muzzleloader. The muzzleloader accepts in the breech end the propellant containment vessel that abuts against a constriction portion with a reduced diameter portion. The propellant containment vessel having an end portion with a tapered surface that conforms to the constriction portion surface. A projectile is inserted in the muzzle end and seats against the constriction portion. The propellant containment vessel may be received in a removable breech plug. The constriction portion may be part of the breech plug or a separate component secured in the barrel by way of the breech plug. The containment vessel further comprises a primer mechanism that may be integrated into the proximal end of the containment vessel.

A novel castable frangible projectile and techniques for manufacturing such are provided. A cartridge system includes a case defining a volume, a propellant disposed in the volume of the case, and a projectile coupled to the case. The projectile includes a body disposed at least partially within the case and configured to enclose the propellant within the volume of the case. The body is formed of a castable eutectic mixture, the castable eutectic mixture configured to be melted and cast, wherein the body is configured to break into a plurality of fragments upon impact with a target.

A novel castable frangible projectile and techniques for manufacturing such are provided. A cartridge system includes a case defining a volume, a propellant disposed in the volume of the case, and a projectile coupled to the case. The projectile includes a body disposed at least partially within the case and configured to enclose the propellant within the volume of the case. The body is formed of a castable eutectic mixture, the castable eutectic mixture configured to be melted and cast, wherein the body is configured to break into a plurality of fragments upon impact with a target.