Partial fragmentation and deformation bullets having an identical point of impact

• US 20050241523A1
• Filed: 04/30/2003
• Published: 11/03/2005
• Est. Priority Date: 04/30/2002
• Status: Active Grant

• Current Assignee: RUAG Ammotec GmbH (Government of Switzerland)
• Original Assignee: RUAG Ammotec GmbH (Government of Switzerland)
• Inventors: Krause, Bernd, Schikora, Irene, Riess, Friedrich
• Granted Patent: US 7,299,750 B2
• Time in Patent Office: Days
• US Class Current: 102/510
• CPC Class Codes: F42B 12/34 expanding before or on impact, i.e. of dumdum or mushroom type

Abstract

Especially in hunting, the choice of bullets has to be such that it is in keeping with the wild animals to be hunted. According to the desired effect on the target, deformation bullets or partial fragmentation bullets are used. Since both types of bullets are different, the position of the point of impact from the same weapon is different. According to the type of bullet used, the weapon must be oriented differently in relation to the target. This can be obstructive and if insufficient attention is paid, can result in misses. According to the invention, a shell-less cored steel bullet is used as a deformation bullet (1) or partial fragmentation bullet (2), having an identical caliber and a closed cavity (4) in the tip (3) of said bullet In order to achieve the same point of impact of said bullets (1,2) on the target, while maintaining the effect of the respectively selected bullet during the same handling of the weapon, during the same setting of the target in an identical position, the external volume, centre of gravity, mass and base copper-tin alloy are identical and the cavity (E) in the tip (3) of the bullet, consisting of a combination of cylindrical and conical sections (10, 12, 13; 20), in addition to the composition of the bullet material, are adapted to the effect of said bullet.

Claims

1. Method for producing shell-less solid bullets as deformation bullets or partial fragmentation bullets with an identical calibre and a closed cavity in the tip of the bullet, characterised in that in order to achieve the same position of the point of impact of the bullets at the target point with the effect of the respectively selected bullet with the same handling of the weapon, with the same setting with respect to a target in an identical position, the external volume, the position of the centre of gravity, the mass and the base alloy, a copper-zinc alloy, are selected so that they are identical, and in that the cavity in the tip of the bullet, consisting of a combination of cylindrical and conical sections, and also the composition of the material of the bullet are matched to the effect of the bullet.

2. Method according to claim 1, characterised in that in the case of the partial fragmentation bullet a conical section whose cone angle is selected so that it is different from that of the preceding conical portion is added to the cavity in front of the shaft bore.

3. Method according to claim 1 or 2, characterised in that if in the case of two types of bullet with features that are provided that are otherwise identical the same masses are to result, the alloy of the partial fragmentation bullet and the alloy of the deformation bullet are matched to each other.

4. Method according to one of claims 1 to 3, characterised in that a circumferential notch is provided as a predetermined breaking point on the conical portion of the bullet.

5. Method according to one of claims 1 to 4, characterised in that in the case of the partial fragmentation bullet in addition to the base alloy another portion of up to 4% of elements that positively influence the splinter-formation and thus the fragmentation, preferably lead or tellurium and phosphorus, is added, to the debit of the basic composition.

6. Shell-less solid bullet as a deformation bullet (1) or partial fragmentation bullet (2) with an identical calibre and a closed cavity (4) in the tip (3) of the bullet, produced according to one of claims 1 to 5, characterised in that in order to achieve the same position of the point of impact of the bullets (1, 2) at the target point with the effect of the respectively selected bullet with the same handling of the weapon, with the same setting with respect to a target in an identical position, the external volume, the position of the centre of gravity, the mass and the base alloy, a copper-zinc alloy, are identical, and in that the cavity (4) in the tip of the bullet (3), consisting of a combination of cylindrical and conical sections (10, 12, 13;

20), and also the composition of the material of the bullet are matched to the effect of the bullet at the target.

7. Shell-less solid bullet according to claim 6, characterised in that the cavity (4) is composed of a conical opening (10), which is closed by a cap (5) with a double-cone form, a cylindrical section (12) and also at least one further conical section (13) and the bore (8) following on therefrom for receiving the shaft (7).

8. Shell-less solid bullet according to claim 6 or 7, characterised in that in the case of the partial fragmentation bullet (2) a further conical section (20) is provided in front of the bore (8) for receiving the shaft (7), and in that this section (20) has a different opening angle from the preceding conical section (13).

9. Shell-less solid bullet according to one of claims 6 to 8, characterised in that the bullet (1, 2) has a conical portion (15) and a follow-on cylindrical portion (16), and in that the conical portion (15) of the partial fragmentation bullet (2) has a circumferential notch (21) as a predetermined breaking point.

10. Shell-less solid bullet according to one of claims 6 to 9, characterised in that the bullet (1, 2) has a sharp edge (14) substantially at the transition from the conical portion (15) to the cylindrical portion (16).

11. Shell-less solid bullet according to one of claims 6 to 10, characterised in that the bullet (1, 2) has relief grooves (17) on the cylindrical portion (16).

12. Shell-less solid bullet according to one of claims 6 to 11, characterised in that the bullet (1, 2) has a tail cone (19) in its tail (18).

13. Shell-less solid bullet according to one of claims 6 to 12, characterised in that in the case of the partial fragmentation bullet (2) in addition to the base alloy another portion of up to 4% of elements that positively influence the splinter-formation and thus the fragmentation, preferably lead or tellurium and phosphorus, is added, to the debit of the basic composition.