초록 ▼

A method of canneluring a frangible projectile includes the steps of rotating the projectile at a high speed, and cutting the cannelure into the projectile to form a frangible cannelured projectile. To ensure that the body is not damaged during cutting, the cutting tool has bevels on each side of a

A method of canneluring a frangible projectile includes the steps of rotating the projectile at a high speed, and cutting the cannelure into the projectile to form a frangible cannelured projectile. To ensure that the body is not damaged during cutting, the cutting tool has bevels on each side of a square, generally flat, cutting surface. A frangible cannelured projectile made by the foregoing method includes a groove having a generally flat base and beveled edges.

대표청구항 ▼

We claim: 1. A method of canneluring a frangible bullet, comprising the steps of: positioning, in a cutting machine, a frangible bullet made of a compressed powdered metal material; rotating the bullet around a longitudinal axis; applying a cutting tool having a flat surface with beveled edges to t

We claim: 1. A method of canneluring a frangible bullet, comprising the steps of: positioning, in a cutting machine, a frangible bullet made of a compressed powdered metal material; rotating the bullet around a longitudinal axis; applying a cutting tool having a flat surface with beveled edges to the bullet in order to machine cut a cannelure. 2. A method as claimed in claim 1, wherein the powdered material is a lead-free powder material. 3. A method as claimed in claim 2, wherein the powdered material comprises a copper tin powder mixture. 4. A method as claimed in claim 1, wherein the beveled edges are at a 45 degree angle relatively to a flat base of the cannelure.