Oct 28, 2025

US12455150 - Extended range bullet

A cartridge with an expanding bullet that has advantageous terminal effects over an extended range. The expanding bullet including a bullet body including a metal jacket extending from a tail portion to a nose portion and surrounding an interior solid core and defining a forward opening and interior cavity. A tip has an exterior surface substantially flush with an exterior surface of the metal jacket. The tip has a main portion forward of the opening and a tip retention portion that at least partially fills the interior cavity. In certain embodiments the tip retention portion includes one or more fluid entry facilitation means such as a fracture regions configured to, upon impact of the bullet with a target, fracture or deform to expose one or more fluid pathways into the interior cavity and to a forward facing interior surface for initiating expansion of the expanding bullet.

Assignee: Federal Cartridge Company
Inventors: Justin A. Carbone, Jared Kutney, Shawn Fitzsimonds, Lawrence P. Head, Bryan Peterson, Richard Hurt, Joel J. Foley
Filing date: 2024-06-11

ammunitionbulletcartridgeexpanding

The patent describes an extended range cartridge featuring an expanding bullet designed for improved terminal effects, with a unique bullet body that includes a metal jacket and an interior cavity. The bullet’s tip incorporates fluid entry facilitation means to enhance expansion upon impact, optimizing its performance over longer distances.

Claim 1

1 . A cartridge, comprising: a casing comprising a rearward primer, propellant, and a bullet, the bullet comprising: a bullet body including a rearward boattail portion extending to a bearing portion and a tapering forward body portion forward of the bearing portion; the bullet body having a circumferential groove positioned in a forward half of the bearing portion and in a rearward half of a length of the bullet body; wherein the circumferential groove is defined by a curved forward wall portion, a bottom wall portion, and a curved rearward wall portion, and wherein a curvature of the curved forward wall portion in cross section is greater than a curvature of the curved rearward wall portion in cross section. a casing comprising a rearward primer, propellant, and a bullet, the bullet comprising: a bullet body including a rearward boattail portion extending to a bearing portion and a tapering forward body portion forward of the bearing portion; the bullet body having a circumferential groove positioned in a forward half of the bearing portion and in a rearward half of a length of the bullet body; wherein the circumferential groove is defined by a curved forward wall portion, a bottom wall portion, and a curved rearward wall portion, and wherein a curvature of the curved forward wall portion in cross section is greater than a curvature of the curved rearward wall portion in cross section. a bullet body including a rearward boattail portion extending to a bearing portion and a tapering forward body portion forward of the bearing portion; the bullet body having a circumferential groove positioned in a forward half of the bearing portion and in a rearward half of a length of the bullet body; wherein the circumferential groove is defined by a curved forward wall portion, a bottom wall portion, and a curved rearward wall portion, and wherein a curvature of the curved forward wall portion in cross section is greater than a curvature of the curved rearward wall portion in cross section.

Google Patents

https://patents.google.com/patent/US12455150

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12455150