FULL METAL JACKET BULLETS WITH IMPROVED LETHALITY

• US 20120180690A1
• Filed: 04/07/2011
• Published: 07/19/2012
• Est. Priority Date: 04/19/2010
• Status: Abandoned Application

• Current Assignee: OLIN Corporation
• Original Assignee: OLIN Corporation
• Inventors: Masinelli, Kyle A., Eberhart, Gerald T.
• Application Number:
  US13/081,743
• Publication Number:
  US 20120180690A1
• Time in Patent Office: Days
• US Class Current: 102/514
• CPC Class Codes: F42B 12/74 of the core or solid body
• CPC Class Codes: F42B 12/78 of jackets for smallarm bullets ; Jacketed bullets or projectiles

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.

Claims

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.