Cartridge case reforming die having precise measuring system

Details Cartridge case reforming die having precise measuring system Cartridge case reforming die having precise measuring system

2000-08-08

2002-06-04

Carone, Michael J. (Department: 3641)

Ammunition and explosive-charge making

Ammunition loading

Implements, including resizing, reconditioning

C086S024000, C086S029000, C086S031000, C086S023000

Reexamination Certificate

active

06397720

ABSTRACT:

FIELD OF INVENTION
This invention relates to an apparatus for reloading firearm cartridges, and more particularly, to a die that provides proper forming of the cartridge case and for quickly and efficiently ensuring proper cartridge case headspace distance when inserted into the die.
BACKGROUND OF THE INVENTION
Cartridge cases are reloaded by individuals for a plurality of reasons. For example, the individual may desire to control the powder charge, the sizing of the bullet, or the resizing of the case. Further, the process for reloading cartridges may be practiced by hobbyists who wish to tailor make their ammunition or save money by reloading their own cartridges.
When a round of ammunition is fired, the cartridge case may be enlarged both by length and in diameter in that the cartridge is expanded longitudinally and also the body and neck of the cartridge case is expanded. In order to reuse a cartridge that has been fired, the cartridge needs to be properly resized. Accordingly, a resizing die is utilized that is typically mounted into a reloading press and the cartridge case is pressed axially into an internal bore of the resizing die to compress and reform the sides of the cartridge case into an appropriate cross sectional configuration. Accordingly, the diameters of the body and neck are shrunk down to their original tolerances.
In a typical cartridge case resizing process, the user is typically required to place the resizing die in a press and then, by trial and error, determine how far the resizing die should be threaded into a bore of the press so that when the cartridge case is resized, the headspace distance of the cartridge does not turn out to be too short, in which the cartridge case needs to be discarded and is of no use, or is too long in which the cartridge case again needs to be resized and remeasured.
Accordingly, it would be desirable to provide an apparatus and method for quickly and efficiently ensuring proper placement of the resizing die as it relates to the reloading press such that after one cartridge is resized, the reloading die can be properly adjusted to be at the proper position in the reloading press thereby ensuring proper headspace distance of the resized cartridge.


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