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US 5,131,123 AGranted
Methods of manufacturing a bullet
AssigneeBarnes Bullets, Inc.
InventorRandy C. Brooks
Life of this patent
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AssigneeBarnes Bullets, Inc.
InventorRandy C. Brooks
Estimating the term…
A bullet is manufactured by providing a slug of metal having an end face and applying an axial force against the end face of sufficient magnitude to form an axially outwardly opening first cavity. Thereafter a second force is applied against the first cavity to reform the first cavity into a second cavity having a peripheral edge of a generally scalloped configuration and an interior surface defining tears of alternating triangular flat faces set-off by edges converging toward a blind end of the cavity. The end portion is then contoured into a generally convex curvature which constricts the scalloped peripheral edge and transforms the triangular faces into radially inwardly directed ribs and alternating lines of weakness which, upon bullet impact, control radial expansion and axial tearing of petals formed during impact which creates maximum hydraulic shock in the absence of fragmentation which in turn ensures humane killing of game.
A method of manufacturing a bullet comprising the steps of providing a slug of generally solid material having an end portion terminating in an end face, applying an impact extrusion force against the end face of sufficient magnitude to form an axially outwardly opening cavity therein in part defined by a generally undulating peripheral edge, and contouring the end portion to impart a generally convex curvature thereto while constricting the peripheral edge.
A method of manufacturing a bullet comprising the steps of providing a slug of generally solid material having an end portion terminating in an end face, applying a firsst impact extrusion force against the end face of sufficient magnitude to form an axially outwardly opening first cavity therein in part defined by an interior surface and a peripheral edge, applying a second impact extrusion force against the first cavity interior surface of sufficient magnitude to reform the first cavity into an axially outwardly opening second cavity in part defined by a generally undulating peripheral edge, and contouring the end portion to impart a generally convex curvature thereto while constricting the undulating peripheral edge.
A method of manufacturing a bullet comprising the steps of providing a slug of generally solid material having an end portion terminating in an end face;
Dependencies are inferred from the claim text.