Aug 12, 2025

US12385725 - Multifunction primer pocket correction tool and method of using same

A multifunction primer pocket correction tool that combines three cutting features in a single hand tool for use in ammunition reloading. The tool operates to cut the primer pocket depth, removes the military crimp and chamfers the leading edge of the flash hole in a single process. This combined tool includes a new technology in an external flash hole chamfer. This adds another level of safety and consistency with each casing, while still chamfering, and end milling the primer pocket, all while using the base of the casing as a backstop for consistent depth of cut.

Assignee: K&M Shooting Products, LLC
Inventors: Roger G. Miller, Jr., David A. Allen
Filing date: 2024-05-27

ammunitionreloadingtool

The patent describes a multifunction primer pocket correction tool designed for ammunition reloading, which integrates three cutting functions into a single hand tool. This innovative design enhances safety and consistency by allowing users to cut primer pocket depth, remove military crimp, and chamfer the flash hole simultaneously.

Claim 1

A multifunction primer pocket cutting tool for use in reloading firearm ammunition comprising: a cutting head: an adapter having a shank; a hex driver attaching to the shank for use with a power drill tool; wherein the multifunction cutting tool is used in machining a casing primer pocket in preparation for a firearm ammunition reload; and wherein the cutting head is configured to cut primer pocket depth, chamfer a flash hole and chamfer a primer pocket. a cutting head: an adapter having a shank; a hex driver attaching to the shank for use with a power drill tool; wherein the multifunction cutting tool is used in machining a casing primer pocket in preparation for a firearm ammunition reload; and wherein the cutting head is configured to cut primer pocket depth, chamfer a flash hole and chamfer a primer pocket.

Google Patents

https://patents.google.com/patent/US12385725

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12385725