Crimped-case cartridge
First Claim
1. A crimped casing cartridge, comprising:
- a bullet; and
a casing having an open end, wherein the casing is attached to the bullet at the open end via a plurality of crimped sections, leaving a plurality of uncrimped sections at the open end.
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Accused Products
Abstract
A crimped-case cartridge comprising a bullet and a casing wherein the casing has alternating crimped and uncrimped sections at its terminal end. The crimped sections form increased contact sections with the bullet, with the uncrimped sections maintaining proper head space for the cartridge. The amount of crimped section versus the amount of uncrimped section is variable to meet a variety of desired ballistic characteristics. Likewise, the amount of taper, angle of crimp, depth of crimp, and pressure applied in the crimped section is also variable. The crimped-case cartridge is employable with bullets having cannelure depressions of any geometry or no cannelure at all. Additionally, a bullet having a cannelure geometry mated to the crimped section geometry is disclosed. Likewise, a plurality of taper-crimp dies forming the crimped-die cartridge is disclosed.
3 Citations
22 Claims
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1. A crimped casing cartridge, comprising:
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a bullet; and
a casing having an open end, wherein the casing is attached to the bullet at the open end via a plurality of crimped sections, leaving a plurality of uncrimped sections at the open end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of forming a crimped-case cartridge, comprising:
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providing a casing taper to remove any casing belling; and
,providing a crimping taper to the casing to form a plurality of alternating crimped and uncrimped sections at an end of the casing. - View Dependent Claims (10, 11, 13, 14, 15, 17, 18, 19, 20)
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12. A bullet having a cannelure, the cannelure comprising:
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a seating edge; and
,a tapered relief surface.
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16. A crimp-taper die, comprising:
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a casing taper;
a crimp taper; and
at least one relief section within the crimp taper, wherein the at least one relief sections excludes a casing section within the relieved section from the crimp taper.
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21. A cartridge comprising:
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a bullet;
a casing adjacent to the bullet; and
a means for crimping the casing to the bullet to ensure proper head space. - View Dependent Claims (22)
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Specification