Calibrated taper crimp die
OwnerThomas B. Buckleyinventor
Life of this patent
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Abstract
An ammunition case reloading die assembly, and method of use, that provides calibrated adjustment of taper imposed on the mouth of an ammunition case. A calibrating ring or cap bears indicia in the form of polygonal faces, splines or radially-directed markings. The ring or cap rotates with an upper portion of the die for threaded adjustment of the position of the die within the frame of a reloading press. The die has a longitudinal bore, a lower portion whereof is tapered for imposing a tapered crimp upon the mouth of the case. The taper of the longitudinal bore is preferably chosen to make each partial rotation of the calibrating ring or cap through one indicium correspond to increasing the taper imposed on the case mouth by one thousandth of an inch per case longitudinal inch.
Claims34
An ammunition case reloading die assembly adapted for being mounted to the die holder of an ammunition reloading press, comprising:
- an elongated, generally cylindrical die body having first and second ends, a bore extending from the first end to the second end, and an external thread for mounting within internal threads of said die holder;
- a lock ring adapted for threading onto said external thread of the die body;
- and
- index means attachable to, and rotatable with, the first end of the die body for manually regulating and calibrating by rotation of said index means the degree of taper crimp to be imposed on the mouth of a sized and loaded ammunition case;
- wherein the second end of said bore in said die has an annular, tapered portion against which the mouth of the case is pressed when the case is pressed far enough into the die body to impose a taper crimp on the mouth of the case.
Dependencies are inferred from the claim text.