Patent ID: 8459163

Claim:
An adjustable sizing die assembly for shaping a bullet, said sizing die assembly comprising: a) a cylindrical steel sizing die having a first external diameter and a through bore with an internal diameter generally equivalent to an external diameter of a bullet, said cylindrical steel sizing die having a first thin-walled tapering portion formed on a first end; b) an external sleeve having a first internal diameter equivalent to said first external diameter of said cylindrical steel sizing die and a second internal diameter larger than said first internal diameter, said second internal diameter being threaded; c) a female compression collar having a first length with a uniform internal diameter, a second length having an internal taper configured to receive said first thin-walled tapering portion, and an external thread which mates with said second internal diameter of said external sleeve; whereby when said female compression collar is tightened into said second internal diameter, said second length having said internal taper collapses said first thin-walled tapering portion to a smaller effective diameter.