High Spin Projectile Apparatus Comprising Components Made by Additive Manufacture

A method of making a projectile apparatus, comprising:

• making one or more components of a projectile apparatus by additive manufacture, the projectile apparatus comprising a propellant, a projectile, and a sabot, the projectile apparatus being configured to spin when fired from a smooth bore barrel, the propellant comprising a combustible material that produces exhaust gases when burned, the projectile apparatus being configured to direct exhaust gases from the propellant away from the propellant as the propellant is burned, and one or both of the projectile and the sabot comprising one or more elements or features for converting gas pressure or velocity from the propellant, as the propellant is burned, to a high rate of projectile spin within a smooth bore barrel, wherein the high rate of projectile spin is greater than 30,000 rotations per minute upon exiting the barrel.

A method of making a projectile apparatus, comprising:

• making one or more components of the projectile apparatus by additive manufacture, the projectile apparatus comprising a propellant, a projectile, and a wadding, the projectile apparatus being configured to spin when fired from a smooth bore barrel, the propellant comprising a combustible material that produces exhaust gases when burned, the projectile apparatus being configured to direct exhaust gases from the propellant away from the propellant as the propellant is burned, and one or both of the projectile and the wadding comprising one or more elements or features for converting gas pressure or velocity from the propellant, as the propellant is burned, to a high rate of projectile spin within a smooth bore barrel, wherein the high rate of projectile spin is greater than 30,000 rotations per minute upon exiting the barrel.