Patent ID: 6739083
Filing Date: 2004-05-25
Classification: F41A

Abstract:
A rifle barrel for realigning a projectile which is propelled through the barrel by gas pressure, said barrel comprising:a bore having a bore diameter and a bore length through which a projectile may travel which has an overall projectile length which is less than the bore length and a contact length that is less than the overall projectile length; and rifling ridges within said bore to contact a projectile along the contact length and rotate the projectile within the bore; at least one bore expansion chamber within said bore, wherein a diameter of at least one bore expansion chamber is greater than the bore diameter, wherein the at least one bore expansion chamber has a length that is smaller than the bore length, smaller than the overall projectile length, and greater than the contact length of the projectile, and wherein the bore expansion chamber is free of the rifling ridges.