Apr 22, 2025

US12281883 - Bullet with controlled fragmentation

A bullet with controlled fragmentation has a core in the form of a generally cylindrical body having a forward end and a rear end and intermediate side portions extending there between, the forward end of the core defining a cavity, a jacket encompassing the rear end and at least selected portions of the sides of the core, the jacket having a sidewall having a first drive band portion having a first wall thickness, and a second portion immediately forward of the drive band portion having a second thickness less than the first thickness, the exterior of the jacket defining a cannelure groove encircling the bullet, and the cannelure groove being positioned forward of the first drive band portion. The drive band may have forward edge defining a step. The bullet of the present invention may also be received in the case mouth of a rimless case and be partially protruding therefrom.

Assignee: HORNADY MANUFACTURING COMPANY
Inventors: David E. Emary
Filing date: 2022-11-14

bulletfragmentationjacketedammunition

The patent describes a jacketed hollow-point bullet designed for controlled fragmentation, featuring a core with a cavity and a jacket that varies in wall thickness. The jacket includes a V-shaped groove positioned adjacent to the thicker portion, enhancing the bullet’s performance when fired from a rimless case.

Claim 1

A jacketed hollow-point bullet comprising: a core having a forward end and a rear end and intermediate side portions extending therebetween; the forward end of the core defining a cavity; a jacket encompassing the rear end and at least selected portions of the sides of the core; the jacket having a sidewall having a first portion having a first wall thickness, and a second portion immediately forward of the first portion having a second wall thickness less than the first wall thickness; the first portion having an edge; the exterior of the second portion of the jacket defining a groove with a V-shape at least in part encompassing the bullet; the groove with a V-shape being positioned adjacent to the first portion of the jacket sidewall; an wherein the groove with a V-shape has a rear limit forward of the edge of the first portion. a core having a forward end and a rear end and intermediate side portions extending therebetween; the forward end of the core defining a cavity; a jacket encompassing the rear end and at least selected portions of the sides of the core; the jacket having a sidewall having a first portion having a first wall thickness, and a second portion immediately forward of the first portion having a second wall thickness less than the first wall thickness; the first portion having an edge; the exterior of the second portion of the jacket defining a groove with a V-shape at least in part encompassing the bullet; the groove with a V-shape being positioned adjacent to the first portion of the jacket sidewall; an wherein the groove with a V-shape has a rear limit forward of the edge of the first portion.

Google Patents

https://patents.google.com/patent/US12281883

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12281883