Bunter technology

摘要

The invention provides methods for making bunters used to form headstamp indicia into ammunition cases. The invention also provides bunter blanks that are specially configured to yield high quality bunters.

主权项

1. A method of producing a bunter that is configured to stamp recessed headstamp indicia into a base of an ammunition cartridge case, the method comprising providing a bunter blank having a generally ring-shaped working face from which projects a radial center protrusion, the radial center protrusion being configured for receipt in a primer pocket of the cartridge case's base during stamping of the recessed headstamp indicia, the bunter blank's generally ring-shaped working face surrounding the radial center protrusion and having an outwardly rounded configuration, wherein the outwardly rounded configuration of the bunter blank's working face is located radially outside of an inwardly radiused section adjacent to a base portion of the radial center protrusion, the method comprising providing a hub having a generally ring-shaped contact face that defines indicia recesses, the generally ring-shaped contact face of the hub surrounding a central pocket, the method comprising assembling the generally ring-shaped working face of the bunter blank against the generally ring-shaped contact face of the hub such that the bunter blank's radial center protrusion is received in the hub's central pocket and applying enough force to the thus assembled bunter blank and hub that material defining the outwardly rounded configuration of the bunter blank's working face is deformed into the hub's indicia recesses so as to form raised indicia on said working face.