Jul 8, 2025

US12352545 - Reduced stiffness barrel fired projectile

In various embodiments, a projectile includes a projectile body including a tail portion, a nose portion, a barrel engaging portion between the nose portion and the tail portion, and a metal jacket that defines an exterior of the projectile that surrounds an interior solid core. In one or more embodiments the projectile includes one or more circumferential grooves defined in the interior core portion, each of the one or more circumferential grooves covered by and positioned adjacent to the metal jacket and within the barrel-engaging portion. In various embodiments, during firing of the projectile, the one or more circumferential grooves define a void that allows material of one or more of the metal jacket and interior solid core to displace into the void for reduction in radial stiffness to the projectile in the barrel engaging portion.

Assignee: Federal Cartridge Company
Inventors: Bryan P. Peterson
Filing date: 2023-09-08

projectileammunitionfirearm

The patent describes a projectile designed with a metal jacket surrounding an interior core, featuring circumferential grooves that create a void during firing. This design allows for material displacement that reduces radial stiffness in the barrel engaging portion, enhancing the projectile’s performance.

Claim 1

A projectile having: a projectile body including a tail portion, a nose portion, a barrel engaging portion between the nose portion and the tail portion, the projectile comprising a metal jacket that extends from the tail portion to at least the nose portion and that defines an exterior of the projectile the metal jacket extending around an interior core, wherein the portions of the projectile body are arranged along a central longitudinal axis; and wherein a plurality of circumferential grooves are defined in the interior core and not in the metal jacket, each of the one or more circumferential grooves covered by and positioned adjacent to the metal jacket; wherein during firing of the projectile, the one or more circumferential grooves define a void that allows material of the metal jacket and interior core to displace into the void for reduction in radial stiffness to the projectile in the barrel engaging portion. a projectile body including a tail portion, a nose portion, a barrel engaging portion between the nose portion and the tail portion, the projectile comprising a metal jacket that extends from the tail portion to at least the nose portion and that defines an exterior of the projectile the metal jacket extending around an interior core, wherein the portions of the projectile body are arranged along a central longitudinal axis; and wherein a plurality of circumferential grooves are defined in the interior core and not in the metal jacket, each of the one or more circumferential grooves covered by and positioned adjacent to the metal jacket; wherein during firing of the projectile, the one or more circumferential grooves define a void that allows material of the metal jacket and interior core to displace into the void for reduction in radial stiffness to the projectile in the barrel engaging portion.

Google Patents

https://patents.google.com/patent/US12352545

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12352545