Patent ID: 7219607
Filing Date: 2007-05-22
Classification: F42B

Abstract:
1. A bullet for a firearm, the bullet comprising: a main body having a main axis and a diameter, said diameter being less than the internal diameter of a barrel of a firearm using said bullet; a counter bore in the rear of said main body, said counter bore being a hollow recess along said main axis and having walls; and an expansion plug, said expansion plug including a rearward-opening hollow recess having a front, said expansion plug placed at least partially within said counter bore; wherein, when said firearm is discharged, propellant gases from said discharge enter said hollow recess in said expansion plug and push against said front to force said expansion plug further into said counter bore, the movement of said expansion plug further into said counter bore forcing said walls to expand away from said main axis; wherein said expansion plug is located entirely within said counter bore prior to said discharge.