Patent ID: 6371029
Filing Date: 2002-04-16
Classification: F42B

Abstract:
A method for the manufacture of a projectile for gun ammunition of 50 caliber or less employing a projectile which includes at least one core of pressed powder housed within a cup-shaped jacket having a closed end, an initially open opposite end, and a longitudinal centerline comprising the steps ofdisposing within the jacket a powder-based core, thereafter, disposing within the jacket in juxtaposition to the core, a powder based disc, said disc comprising a compressed compact having opposite planar faces and pressure-formed from a powder or mixture of powders into a substantially self-supporting compact of substantially uniform thickness and substantially uniform density throughout the compact, said compact being of substantially right cylindrical geometry with its perimetral edges being free of extraneous material and being deformable when incorporated into the jacket with one or more cores and with said disc being initially oriented with its planar faces disposed substantially normal to the longitudinal centerline of the jacket, pressing said core and disc simultaneously into conforming fit within a portion of the interior volume of the jacket, thereafter, die-forming an ogive at the open end of the jacket by forcing the open end of the jacket into a die cavity which defines the desired geometry of the ogive, the force applied to the jacket being sufficient to deform the open end of the jacket, along with the disc and at least a portion of that end of the core juxtaposed to the disc, into conformity with the volume of the die cavity, and to deform said disc into a generally hollow hemispherical geometry within the ogive and substantially filling said hollow with powder from said core.