Die with interchangeable and adjustable mold parts for calibrating cartridge cases

Abstract

Die for calibrating cartridge cases with interchangeable and adjustable internal parts, comprising: • a die body with a central bore for receiving molded parts, • a first molded part for calibrating the powder chamber, • a second molded part for calibrating the neck / shoulder area, wherein the second molded part is interchangeable and height-adjustable.

Description

[0001] Die sets for sizing cartridge cases serve to make cartridge cases reloadable into a chamber and to ensure a secure bullet seating. However, since chambers in different firearms (of the same caliber) can have significantly different dimensions, it is often necessary to adapt the die used for sizing to the specific chamber.

[0002] Similarly, the wall thickness of cartridge cases, especially in the bullet seating area, varies, so that excessive reaming almost always occurs. This is achieved by a process called an expander, which, as the bullet is ejected from the cartridge case, widens the case neck to the dimension required for a secure bullet seat. This unnecessary overloading of the cartridge case leads to stresses in the material, resulting in the cartridge case failing prematurely.

[0003] The die with interchangeable and adjustable components for sizing cartridge cases allows both the powder chamber area and the neck / shoulder area to be adapted to the specific purpose. Additionally, the neck / shoulder area can be adjusted vertically to achieve an optimal length tailored to the specific firearm.

[0004] This prevents excessive stress on the cartridge case and increases its service life. Furthermore, with optimal adaptation to the chamber, higher precision can be expected. Description:

[0005] The die body has the outer shape of a standard reloading die, as used in commercially available presses. This body contains a through bore that serves to center the die pieces.

[0006] The component that calibrates the powder chamber is inserted from below and held in position by a thread. The fit is achieved through precise manufacturing of the outer diameter. To allow for the forming of the neck / shoulder section of the cartridge case, the length is slightly reduced.

[0007] The neck / shoulder mold has an internal shape suitable for calibrating the cartridge case. Its interchangeability allows for the use of neck / shoulder bushings with different diameters, adapted to the specific application. The goal is to shape the case neck to achieve a secure bullet seat without unnecessarily stressing the material.

[0008] To optimally adjust the distance from the base to the shoulder to the length of the respective cartridge chamber, the neck / shoulder bushing is height-adjustable via a stop on the spindle. The spindle position is adjustable via a thread, optionally with a fine adjustment featuring detents.

[0009] This allows three parameters to be adjusted: • The diameter of the powder chamber. • The diameter of the sleeve neck. • The length from the base of the cartridge case to the shoulder.

[0010] This allows the following types of calibrations to be performed: • Full calibration • Neck calibration • Calibration of the powder chamber only • Pushing back the shoulder position

Claims

[1] Die for calibrating cartridge cases with interchangeable and adjustable internal parts, comprising: • a die body with a central bore for receiving molded parts, • a first molded part for calibrating the powder chamber, • a second molded part for calibrating the neck / shoulder area, wherein the second molded part is interchangeable and height-adjustable. [2] Die according to claim 1, wherein the first forming part is screwed into the die body from the underside by means of a thread. [3] Die according to claim 1 or 2, wherein the second mold part has a height-adjustable spindle. [4] Die according to claim 3, wherein the spindle has an optional fine adjustment with detent. [5] Die according to one of the preceding claims, wherein different neck / shoulder bushings with different diameters can be used.

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