Projectile body and corresponding ammunition round for small arms or a light firearm

An ammunition round comprising:

• a projectile body having first and second axially opposed ends and a cavity extending between the first end and the second end, the first end being a leading end of the projectile and closed, the cavity being capable of holding a quantity of propellant for propelling the projectile body;
• a plurality of seals extending about an outer surface of the body, each seal protruding radially from the body to form a substantial seal against an inner circumferential surface of the barrel of a firearm, wherein two of the plurality of seals are mutually adjacent and spaced apart in a direction of a longitudinal axis of the body to form a seal bound outer surface portion of the body;
• and
• one or more holes formed in the body enabling fluid communication between the cavity and the seal bound outer surface portion of the body;
• a quantity of propellant held in the cavity;
• a base seal closing the second end to confine the propellant in the cavity;
• and, a primer supported in the base seal.

An ammunition round comprising:

• a projectile body first and second axially opposed ends and a cavity extending between the first end and the second end, the first end being a leading end of the projectile and closed, the cavity being capable of holding a quantity of propellant for propelling the projectile body;
• a plurality of seals extending about an outer surface of the body, each seal protruding radially from the body to form a substantial seal against an inner circumferential surface of the barrel of a firearm, wherein two of the plurality of seals are mutually adjacent and spaced apart in a direction of a longitudinal axis of the body to form a seal bound outer surface portion of the body;
• and
• one or more holes formed in the body enabling fluid communication between the cavity and the seal bound outer surface portion of the body;
• a tubular case sealed at one end by a base, the case fitted over a portion of the projectile body with the base facing the second end of the projectile body and closing the cavity;
• and
• a quantity of propellant retained within the cavity by the case, and wherein the first end of the projectile body protrudes from the case.