Cartridge and Bullet with Controlled Expansion
AssigneeHornady Manufacturing Company
InventorDavid E. Emary
Life of this patent
Estimating the term…
Abstract
A bullet or a cartridge containing a bullet having an elongated body with a forward end and an opposed rear end. The body has an intermediate cylindrical portion between the rear and forward ends, and the front end of the body defines a cavity. A resilient nose element is received in the cavity. The nose element may be an elastomer, and may be a cylindrical body. The cavity may be a cylindrical bore, and the nose element may be closely encompassed within the bore. The forward end of the nose element may be flat, and may be flush with the forward end of the body.
Claims46
A 9 mm handgun bullet comprising:
- an elongated body;
- the body having a forward end;
- the body having a rear end opposite the forward end;
- the body having a cylindrical portion between the rear and forward ends, the body comprising a jacket encompassing a solid lead alloy core, the jacket having score lines to facilitate bullet expansion upon impact;
- the jacket defining a circumferential cannelure;
- the solid core directly contacting an interior surface portion of the jacket in the vicinity of the cannelure;
- a resilient nose element having an exposed flat front end;
- at least a portion of the nose element being received in a cavity open to the forward end of the body;
- wherein the nose element is an elastomer that can be compressed to less than 50% of its length repeatedly without permanent deformation;
- and
- wherein the jacket at the forward end of the body curves radially inward over the lead alloy core to form a blunt forward rim that defines a forward opening to the cavity.
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A firearm ammunition component comprising:
- an elongated body;
- the body having a forward end;
- the body having a rear end opposite the forward end;
- the body having a cylindrical portion between the rear and forward ends;
- the body defining a cavity open to the forward end of the body;
- the body comprising a jacket encompassing a solid lead alloy core;
- the jacket defining a circumferential cannelure;
- the solid core directly contacting an interior surface portion of the jacket in the vicinity of the cannelure;
- a resilient nose element, at least a portion of which is received in the cavity;
- wherein the portion of the nose element received in the cavity is an elongated body having opposed ends;
- and
- wherein the body has a caliber and the nose element is an elastomer having a Shore A hardness that is less than or equal to 1/100 of an X-axis velocity function for the caliber of the body and greater than or equal to 1/500 of the X-axis velocity function for the caliber of the body.
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A firearm ammunition component comprising:
- an elongated body;
- the body having a forward end;
- the body having a rear end opposite the forward end;
- the body having a cylindrical portion between the rear and forward ends;
- the body defining a cavity open to the forward end of the body;
- a resilient nose element, at least a portion of which is received in the cavity;
- wherein the nose element is an elastomer having a Shore A hardness less than or equal to 80;
- wherein the body includes a solid lead alloy core surrounded by a jacket, and wherein the jacket has a forward portion extending forward of the core and defining an aperture closely receiving a forward portion of the nose element;
- the jacket defining a circumferential cannelure;
- and
- the solid core directly contacting an interior surface portion of the jacket in the vicinity of the cannelure.
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Dependencies are inferred from the claim text.