Full metal jacket bullets with improved lethality

Abstract

An improved pistol bullet comprises a jacket having a generally cylindrical body portion and a tapering nose portion; a first material disposed in the tapering nose portion of the jacket, and a second material, having a higher density than the first material, disposed in the jacket behind the first material.

1 . An improved pistol bullet comprising:
 a jacket having a generally cylindrical body portion and a tapering nose portion; and   a first material disposed in the tapering nose portion of the jacket, and a second material, having a higher density than the first material, disposed in the jacket behind the first material.   
     
     
         2 . The improved pistol bullet according to  claim 1 , wherein the first material substantially fills the tapering nose portion of the jacket. 
     
     
         3 . The improved pistol bullet according to  claim 1 , wherein the first material is non-metallic, and the second material is metallic. 
     
     
         4 . The improved pistol bullet according to  claim 1 , wherein the first material is a compacted, flowable powder. 
     
     
         5 . The improved pistol bullet according to  claim 4 , wherein the first material is sodium carbonate. 
     
     
         6 . The improved pistol bullet according to  claim 5 , wherein the second material is tin or a tin alloy. 
     
     
         7 . The improved pistol bullet according to  claim 5 , wherein the second material is lead or a lead alloy. 
     
     
         8 . The improved pistol bullet according to  claim 1 , wherein the density of the second material is at least twice the density of the first material. 
     
     
         9 . The improved pistol bullet according to  claim 8 , wherein the density of the second material is at least three times the density of the first material. 
     
     
         10 . The improved pistol bullet according to  claim 1 , wherein the location of the center of pressure of the bullet in air at STP (for velocities of between about 900 and about 1400 is at least 70/1000 from the center of mass of the bullet. 
     
     
         11 . The improved pistol bullet according to  claim 1 , further comprising flat faces on the exterior nose portion of the jacket. 
     
     
         12 . The improved pistol bullet according to claim,  1  configured so that when the bullet is fired into 10% ballistic gelatin at a velocity of between about 900 feet per second and about 1400 feet per second, the bullet penetrates the ballistic gelatin between about 12 inches and about 18 inches. 
     
     
         13 . The improved pistol bullet according to  claim 12 , wherein when the bullet is fired into 10% ballistic gelatin at a velocity of between about 900 feet per second and about 1400 feet per second, the bullet does not penetrate more than about 15 inches. 
     
     
         14 . The improved pistol bullet according to  claim 1 , configured so that when the bullet is fired into 10% ballistic gelatin at a velocity of between about 900 feet per second and about 1400 feet per second, the bullet yaws by at least 90° within about 6 inches of penetrating the ballistic gelatin. 
     
     
         15 . The improved pistol bullet according to  claim 14 , configured so that when the bullet is fired into 10% ballistic gelatin at a velocity of between about 900 feet per second and about 1400 feet per second, the bullet yaws by at least 90° within about 4.75 and about 5.25 inches of penetrating the ballistic gelatin. 
     
     
         16 . The bullet according to  claim 1 , configured so that when the bullet is fired into 10% ballistic gelatin, the bullet transfers 100% of its kinetic energy to 10% to the gelatin before the bullet penetrates 18 inches into the ballistic gelatin. 
     
     
         17 . The bullet according to  claim 1 , wherein the density of the first material is sufficiently lower than the density of the second material that when the bullet is fired into 10% ballistic gelatin, the bullet achieves 90° yaw at least 3 inches earlier than a bullet of the same configuration that contains only the second material, fired into 10% ballistic gelatin at the same speed. 
     
     
         18 . The bullet according to  claim 1 , wherein the density of the first material is sufficiently lower than the density of the second material that when the bullet is fired into 10% ballistic gelatin, the bullet stops at least 5 inches earlier than a bullet of the same configuration that contains only the second material, fired into 10% ballistic gelatin at the same speed. 
     
     
         19 . The bullet according to  claim 1 , wherein the density of the first material is sufficiently lower than the density of the second material such that when the bullet is fired into 10% ballistic gelatin, the bullet transfers 100% of its kinetic energy to the gelatin at least 5 inches earlier than a bullet of the same configuration that contains only the second material, fired into 10% ballistic gelatin at the same speed.