Full metal jacket penetrator projectile

Abstract

The invention relates to a full metal jacket penetrator projectile (1), in particular having a caliber of less than 20 mm, in particular less than 12 mm or less than 9 mm, comprising a projectile jacket (3), a front penetration core (7), in particular a penetration core made of steel or hardened metal, which is provided in the projectile jacket (3), and a rear core (5) which is provided in the projectile jacket (3). The projectile is characterized in that the penetration core (7) has a recessed diameter (9), in particular a recessed diameter over the circumference, at the rear on the circumferential surface facing the projectile jacket (3) so that an annular space (11), in particular a circumferential annular space, is formed between the penetration core (7) and the projectile jacket (3), the rear core (5) protruding into the annular space.

Description

[0001] SwissP Defense AG, R31240WO SKIYI / P

[0002] Penetrator full metal jacket bullet

[0003] The present invention relates to a penetrator full metal jacket projectile, in particular with a caliber of less than 20 mm, less than 12 mm, or less than 9 mm. Penetrating projectiles of this type are preferably used in the military sector and serve to penetrate higher protection classes. This means that the projectiles have increased penetration power in order to damage or penetrate targets of increased strength.

[0004] So-called dual-core bullets are known from the prior art, in which the front core consists of a hard material such as cemented carbide and the rear core of lead, with both cores integrated into a full metal jacket. The hard core provides the penetration power, while the rear core serves to improve accuracy and reduce barrel erosion. In the 5.56 x 45 mm NATO ammunition category, the SS109 model has become predominant, featuring a very small frontal penetration core and a large rear lead core that extends to the rear of the bullet's ogive. However, this bullet's insufficient penetration upon impact with a target has proven to be a disadvantage.

[0005] In an attempt to increase penetration power, a conflict of objectives was identified with regard to the simultaneous desire to protect the firearm barrel. If the frontal hard core of the SS109 projectile were extended towards the rear, barrel erosion would increase considerably, resulting in significant damage to the firearm barrel. Furthermore, it was found that this would lead to a significantly worsened pressure-velocity ratio.

[0006] From RU 2357195 C1, a penetrating full metal jacket bullet of this type is known, featuring a front-facing carbide core and a rear-facing lead core. Compared to the SS109 bullet, this bullet has a longer front-facing carbide core that extends well into the rear of the bullet, essentially covering the entire length of the cylindrical section. Firstly, there is an increased need for lead-free bullets. Secondly, the manufacturing process of the bullet according to RU 2357195 C1 has proven to be disadvantageous. The front carbide core partially overlaps the ogive in the front of the bullet and has a cylindrical section extending towards the rear of the bullet. This cylindrical section is smaller than the bullet jacket, allowing the rear-facing lead core to extend into the resulting space and form a jacket.It has been found that the jacket length is too large in relation to the remaining length of the lead core, complicating manufacturing. In the production of this type of projectile, a cylindrical lead blank is inserted at the rear and pressed towards the projectile front using a die, thus forming the jacket section around the carbide core. If the jacket length is too large relative to the remaining length of the lead core at the rear, the lead core migrates outwards beyond the axial extent of the jacket, preventing the die from sealing completely against the jacket and compromising reliable production. Furthermore, it was determined that the aforementioned trade-off between high penetration power and reduced barrel erosion is not reliably achieved.

[0007] One object of the present invention is to overcome the disadvantages of the prior art, in particular to provide a penetrator full metal jacket bullet that achieves reduced barrel erosion while maintaining the highest possible penetration performance.

[0008] The problem is solved by the subject matter of the independent claims.

[0009] A penetrator full metal jacket bullet, in particular with a caliber of less than 20 mm, especially less than 12 mm or less than 9 mm, is then provided.

[0010] The full metal jacket projectile according to the invention comprises a projectile jacket, a front-facing penetration core arranged in the projectile jacket, preferably made of steel or hardened metal, and a rear-facing core arranged in the projectile jacket. The projectile jacket serves as the outer shell of the projectile and ensures its structural integrity. The penetration core at the front is responsible for the penetration performance, while the rear core, which is preferably made of lead, improves accuracy and reduces barrel erosion. According to one aspect of the present invention, the penetration core has a diameter reduction, preferably circumferential, on its circumferential surface facing the projectile jacket at the rear, so that an annular space, preferably circumferential, is formed between the penetration core and the projectile jacket, into which the rear core projects.A particular advantage of the present invention is that, while maintaining high penetration performance, a reduction in barrel erosion is achieved. This leads to a longer service life for the firearm barrel without compromising the desired high penetration performance. The rear core serves to reduce barrel erosion by acting as a buffer between the hard penetration core and the rifle barrel. Due to the diameter step, a uniform layer of the rear core can form around the penetration core between the latter and the projectile jacket, thus ensuring the most precise possible centering of the penetration core within the jacket. This reduces any imbalances and increases accuracy. It was also found that the diameter step results in a shoulder extending transversely to the projectile's longitudinal direction, which acts as a stop for the rear core.This serves to limit its deformation during manufacturing, ensuring a defined deformation space, particularly when pressing the rear core into the gap between the penetration core and the shell. This, in turn, can reduce any existing imbalances and / or increase precision.

[0011] According to one exemplary embodiment, the shoulder can be designed such that in the area of ​​the full metal jacket bullet, where the jacket must be deformed during insertion into the rifling of the firearm barrel to reduce barrel erosion, a particularly thin and / or uniform intermediate layer of the tail core is present. This results in a good pressure-velocity ratio, a long barrel life, and good accuracy in the form of low dispersion and a flat trajectory.

[0012] The reduced diameter allows the penetration core to be extended into the rear section of the full metal jacket bullet, thus increasing the mass fraction of the penetration-relevant core without significant losses in terms of barrel life or pressure-velocity ratio. This is because barrel erosion is reduced by the jacket section of the rear core that encases the rear portion of the penetration core. Tests have shown that the full metal jacket bullet according to the invention exhibits 30% higher penetration performance compared to the conventional SS109 bullet. The test was conducted using steel plates made of either structural steel or high-strength steel with a hardness of approximately 400 HB.

[0013] According to an exemplary embodiment, the diameter setback has a dimension of less than 1 mm, in particular less than 0.75 mm or less than 0.5 mm, and / or less than 10%, in particular less than 9% or less than 8%, of the maximum diameter of the full metal jacket bullet. The maximum diameter is determined by the caliber. The small diameter setback ensures the proper manufacture of the full metal jacket bullet, in particular the insertion of the tail core at the rear. The tail core, which is typically made of a softer material such as lead, protrudes into the annular space and provides improved stability and accuracy of the bullet.

[0014] In one exemplary embodiment, the projectile jacket comprises a front ogive section and a rear cylindrical section to engage the rifling profile of a firearm barrel. The ogive section is the front, aerodynamically shaped part of the projectile, which minimizes drag and improves flight stability. The cylindrical section is the rear cylindrical part of the projectile, which guides it within the barrel and assists its rotation as it travels through the barrel. The rear core extends only as far as the transition from the ogive section to the cylindrical section. In other words, the rear core does not protrude into the ogive section. This ensures, firstly, that the rear core is located in the area of ​​the projectile where it is needed to protect the barrel, and secondly, that its mass is limited to the overall weight so as not to impair penetration performance.

[0015] According to an exemplary embodiment, the penetration core has a core section, particularly a cylindrical one, that adjoins the rearward reduction in diameter at the rear. This core section has a length in the longitudinal direction of the projectile that is at most 50% of the total length of the penetration core, preferably at most 40%, 30%, or 25%. This improves the manufacturability of the projectile, as the cylindrical core section, and thus the sleeve section of the rear core, is not too long, allowing the rear core to be reliably pressed into the surrounding annular space. This ensures that the rear core is firmly and stably anchored in the projectile jacket. The core section can be provided with a demolding angle oriented in the rear direction of the projectile, particularly to facilitate manufacturing, which can be, for example, a maximum of 2°, preferably about 0.5°. In this respect, the core section can be slightly conical in this area.

[0016] In one exemplary design, the penetration core is manufactured using bulk forming. Bulk forming is a manufacturing process in which the material is plastically deformed into the desired shape without removing any material. This process allows the penetration core to be manufactured from a single piece, resulting in high strength and homogeneity of the material. Using bulk forming enables the penetration core to be manufactured with exceptional precision and tight tolerances, improving the overall quality and performance of the projectile. One advantage of this process is the increased strength of the penetration core, as the plastic deformation causes work hardening of the material. Bulk forming also produces a smooth surface in a cost-effective manner, which in turn enhances penetration performance because the friction between the core and the material to be penetrated is reduced.This reduces the imbalance of the projectile and results in a more stable trajectory.

[0017] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a penetrator full metal jacket bullet, in particular with a caliber of less than 20 mm, especially less than 12 mm or less than 9 mm, is provided.

[0018] The full metal jacket bullet according to the invention comprises a bullet jacket, a front-facing penetration core arranged in the bullet jacket, in particular made of steel or hardened metal, and a rear-facing core arranged in the bullet jacket. The bullet jacket serves as the outer shell of the bullet and ensures its structural integrity. The penetration core at the front is responsible for the penetration performance, while the rear core, which is preferably made of lead, improves accuracy and reduces barrel erosion.

[0019] The penetration core can have a frontal point with a tip angle ranging from 70° to 120°, which can improve the projectile's penetration capability. The projectile jacket is divided into two sections: a front ogive section and a rear cylindrical section that engages the rifling profile of a firearm barrel. The rear core extends to the transition from the ogive section to the cylindrical section, thus optimally distributing the mass of the rear core to reduce barrel erosion. In other words, the rear core does not protrude into the ogive section. This ensures, firstly, that the rear core is positioned in the area of ​​the projectile where it is needed to protect the barrel, and secondly, that its mass is limited to the overall weight so as not to impair penetration performance.

[0020] The penetration core makes full contact with the bullet jacket along the entire ogive section. This ensures consistent force transmission and stability during flight. Specifically, the penetration core maintains full contact with the bullet jacket along its entire length at the axial height of the ogive section. This full-surface contact between the penetration core and the bullet jacket along the ogive section guarantees a stable trajectory and uniform force distribution, further improving the bullet's accuracy and ballistic properties.

[0021] In one exemplary embodiment, the penetrating core is undersized at the rear relative to the projectile jacket, creating an annular space between the core and jacket into which the core protrudes, with the core essentially filling this space. Due to manufacturing constraints, the core is initially provided as a cylindrical blank and inserted into the jacket from the rear of the projectile, aligning it with the front-facing penetrating core. The core is then pressed in using a die, resulting in material from the core being displaced into the annular space. The term "undersized" refers to the deliberate reduction in the diameter of the penetrating core compared to the projectile jacket to create the described annular space.The tail core, typically made of a softer material like lead, fills this space and ensures a better fit of the bullet to the rifling profile of the barrel. This reduces barrel erosion, as the softer tail core minimizes friction and wear within the barrel. The surrounding annular space allows the tail core to deform optimally upon firing and conform to the jacket, thereby increasing bullet accuracy. Furthermore, the tail core contributes to bullet stabilization and improves ballistic properties by stabilizing the trajectory and optimizing muzzle velocity.

[0022] According to an exemplary embodiment, the tail core comprises a sleeve portion that encases the penetration core and has a length in the longitudinal direction of the projectile of at most 60%, in particular at most 55%, at most 50%, or at most 45% of the total length of the tail core in the longitudinal direction of the projectile. The sleeve portion of the tail core at least partially encases the penetration core and provides a flexible intermediate layer between the projectile jacket and the penetration core. The specific length of the sleeve portion in relation to the total length of the tail core is selected to achieve an optimal balance between reducing barrel erosion and maintaining the structural integrity of the projectile. This exemplary embodiment makes it possible to optimally combine the advantages of a hard penetration core with those of a softer tail core, resulting in improved overall projectile performance.According to the exemplary further development, it is ensured, among other things, that the jacket length is not too large in relation to the remaining length of the lead core, thus simplifying manufacturing as much as possible. The rear core, pressed into the jacket from the rear using a press die, is dimensioned so that it does not extend beyond the axial length of the jacket. This ensures that the press die seals completely against the jacket, guaranteeing reliable production. Furthermore, it was found that the aforementioned conflict of objectives—high penetration on the one hand and reduced barrel erosion on the other—is not reliably achieved.

[0023] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a penetrator full metal jacket bullet, in particular with a caliber of less than 20 mm, especially less than 12 mm or less than 9 mm, is provided.

[0024] The full metal jacket bullet according to the invention comprises a bullet jacket, a front-facing penetration core arranged in the bullet jacket, preferably made of steel or hardened metal, and a rear-facing core arranged in the bullet jacket. The bullet jacket serves as the outer shell of the bullet and ensures its structural integrity. The front-facing penetration core is responsible for the penetration performance, while the rear core, preferably made of lead, improves accuracy and reduces barrel erosion. The penetration core can have a front-facing tip with a tip angle in the range of 70° to 120°, which can improve the bullet's penetration capability.

[0025] According to a further aspect of the present invention, the penetration core is manufactured by bulk forming. The term "bulk forming" refers to a manufacturing process in which the penetration core is produced by plastically deforming a workpiece without removing any material. This method makes it possible to form the penetration core from a single piece of material, resulting in greater strength and homogeneity of the core. The front tip of the penetration core can be designed to have an optimal tip angle that increases the penetration power of the projectile. A tip angle in the range of 70° to 120° provides a good compromise between maximum penetration power when the projectile strikes the material to be penetrated at a right angle and the lowest possible loss of penetration power at impact angles of less than 90°.Manufacturing the penetration core through bulk forming achieves high strength and hardness, further improving the projectile's penetration performance. The tail core, located in the rear of the projectile jacket, serves to reduce barrel erosion. Barrel erosion occurs when the projectile is propelled through the barrel, removing material and leading to decreased accuracy and reduced barrel life. The tail core, typically made of a softer material such as lead, conforms better to the rifling profile of the barrel during firing, thus reducing friction and material loss. This results in improved accuracy and a longer barrel life.The combination of a hardened penetration core with a soft tail core thus offers an advantageous solution that optimizes both the penetration power and precision of the projectile and the service life of the firearm barrel.

[0026] According to an exemplary embodiment, the full metal jacket bullet is characterized by the specific material selection for the penetration core and the tail core. The penetration core is made of a material with a hardness of at least 55 HRC and / or at most 66 HRC. Alternatively or additionally, the tail core can be made of a material with a hardness of at most 160 N / mm². 2It has been found that a specific strength ratio between the penetration core and the rear core, in particular a difference in strength between the penetration core and the rear core, is crucial in resolving the inherent conflict of objectives of the invention between high penetration performance and reduced barrel erosion, regardless of the specific material selection. A hardness of the penetration core in the range of 55 to 66 HRC ensures that the core retains its shape and integrity upon impact, resulting in greater penetration depth. The selection of a material with a hardness of no more than 160 N / mm² 2The softer rear core effectively reduces barrel erosion by conforming better to the rifling profile of the rifle barrel during firing. This reduces friction and wear within the barrel, extending its lifespan. Furthermore, the softer rear core improves bullet accuracy by minimizing imbalance and ensuring a more even distribution of mass. This material combination optimizes the bullet's internal ballistics by creating a favorable pressure-velocity ratio, resulting in a higher muzzle velocity and a flatter trajectory.

[0027] According to one exemplary embodiment, the penetrator full metal jacket bullet is designed such that the weight fraction of the penetrating core to the total bullet weight is at least 20% and / or at most 50%, and / or the axial length of the penetrating core in the bullet's longitudinal direction is less than 60%, and in particular less than 55%, of the total bullet's longitudinal length. The penetrating core can be dimensioned to have sufficient mass and length to ensure effective penetration of targets. For a 5.56 caliber full metal jacket bullet, the mass fraction of the penetrating core could be increased from approximately 15% to at least 20% compared to standard bullets, such as the SS109 bullet, and for the 6.8 caliber bullet, from below 20% to at least 30%.A minimum weight of 20% for the penetration core ensures it is heavy enough to deliver the necessary kinetic energy to penetrate hard targets. Simultaneously, a 50% upper limit prevents the penetration core from becoming too large relative to the tail core and jacket, which would impair manufacturing. This upper limit also ensures reliable tail core insertion. This can also be achieved by limiting the axial length of the penetration core to less than 60% of the total bullet length.

[0028] According to one exemplary design, the tail core contains or is made of tin, a tin alloy (particularly a tin-bismuth alloy), zinc, a zinc alloy, and / or plastic. This makes it possible to create a lead-free bullet. Tin and tin alloys, such as tin-bismuth alloys, are known for their good malleability and low hardness, which helps to reduce barrel erosion. Zinc and zinc alloys offer similar advantages, as they also exhibit good malleability and relatively low hardness. Plastic as a material for the tail core offers the additional advantage of low manufacturing costs and high malleability. Furthermore, plastic's damping properties can further reduce stresses on the barrel, which also contributes to reducing barrel erosion.

[0029] According to one exemplary design, the penetration core has a frontal point with a tip angle ranging from 70° to 120°. This increases the projectile's penetration power. A tip angle of 70° to 120° provides a good compromise between maximum penetration performance when the projectile strikes the material at a right angle and minimal loss of penetration performance at impact angles of less than 90°.

[0030] According to another exemplary embodiment, the penetration core has a front-facing stub section with an ogive-shaped outer contour and / or an end face oriented perpendicular to the longitudinal direction. The radius of curvature of the stub section can differ from that of the ogive section of the jacket, so that the radial distance between the outer contour of the core and the ogive section of the jacket increases towards the projectile front. The penetration core, in particular its stub section with the flattened end face, can be manufactured by bulk forming or machining.

[0031] Preferred embodiments are specified in the dependent claims.

[0032] Further properties, features and advantages of the invention will be clarified below by describing preferred embodiments of the invention with reference to the accompanying exemplary drawings, which show:

[0033] Fig. 1 shows an exemplary embodiment of a full metal jacket bullet according to the invention in sectional view;

[0034] Fig. 2 shows a further exemplary embodiment of a full metal jacket bullet according to the invention in sectional view; Fig. 3 shows a further exemplary embodiment of a full metal jacket bullet according to the invention in sectional view.

[0035] In the following description of exemplary embodiments of the present invention, a penetrator full metal jacket bullet according to the invention is generally referred to by the reference numeral

[0036] 1. According to Figure 1, one embodiment of the projectile is in caliber 5.56 and in Figure

[0037] Figure 2 shows a version in caliber 6.8. Figure 3 shows another version of a full metal jacket bullet, which differs essentially in the design of the front core. Identical or similar components are designated with the same or similar reference numerals.

[0038] Figure 1 shows a schematic cross-sectional view of a penetrator full metal jacket bullet 1. The bullet comprises a jacket 3, which has a front ogive section 13 and a rear cylindrical section 15, which defines a maximum diameter d of the bullet 1 and is designed to engage the rifling profile of a firearm barrel. A penetration core 7 and a tail core 5 are arranged within the jacket 3.

[0039] The penetration core 7 is made of steel or another hardened metal and has a frontal tip 19 with a tip angle α in the range of 70° to 120°. The penetration core 7 extends along the ogive section 13 and is in full contact with the projectile jacket 3. At its rear, the penetration core 7 has a circumferential diameter recess 9, to which a rear-facing cylindrical core section 17 connects, forming a circumferential annular space 11 between the penetration core 7 and the projectile jacket.

[0040] 3 results in the diameter step 9 having a dimension t of less than 1 mm, in particular less than 0.75 mm or less than 0.5 mm.

[0041] The tail core 5 is located at the rear of the penetration core 7 within the projectile jacket 3 and projects into the surrounding annular space 11. The tail core 5 has a sleeve section 21, produced by pressing during manufacturing, which encases the cylindrical core section 17 of the penetration core 7. The tail core 5 is made of a material with a hardness of no more than 160 N / mm². 2 , such as tin, a tin alloy, in particular a tin-bismuth alloy, zinc, a zinc alloy or plastic. The sleeve part 21 encasing the penetration core 7 has a length a in the longitudinal direction L of at most 60%, in particular at most 55%, at most 50% or at most 45% of the total length of the tail core in the longitudinal direction L, in order to reliably carry out the manufacturing, in particular the pressing in by means of a press die.

[0042] The penetration core 7 is in full contact with the projectile jacket 3 along the ogive section 13, while the tail core 5 extends, according to the exemplary embodiments, at most to a transition from the ogive section 13 into the cylinder section 15.

[0043] The 9-inch diameter step offers advantages beyond maximizing penetration and reducing barrel erosion. It also provides a defined stop and limit for the amount of material pressed into the annular space of the rear core. This defined stop simplifies manufacturing and prevents incorrect assembly.

[0044] Figure 2 shows another exemplary embodiment of a penetrator full metal jacket bullet 1 according to the invention, which differs from the embodiment according to Figure 1 essentially with regard to the caliber, i.e., the axial diameter d. The embodiment according to Figure 1 represents a 5.56 caliber bullet, the embodiment according to Figure 2 a 6.8 caliber bullet.

[0045] Furthermore, the above statements regarding Figure 1 essentially also apply to the embodiments according to Figure 2. As can be seen from the comparison of Figures 1 and 2, one dimension of the sleeve part 21 is slightly different. Firstly, the wall section t of the diameter step 9 is smaller in Figure 2, but its axial dimension a is somewhat larger. The relevant proportions for the invention with regard to length and also with regard to the weight fraction of the penetration core in relation to the total mass are present in both embodiments.

[0046] The embodiment of the inventive projectile 1 according to Figure 3 differs from the preceding projectiles 1 essentially by the pointed shape of the front core 5. According to Figure 3, the core 5 has a front blunt section 23. This blunt section 23 has an ogive-shaped outer contour 25, the radius of curvature of which differs from that of the ogive section 13 of the mantle 3, such that the radial distance between the outer contour 25 of the core 5 and the ogive section 13 of the mantle 3 increases towards the projectile front. An end face 27 of the blunt section 23 is oriented essentially perpendicular to the longitudinal direction of the penetration core 7. The penetration core 5, in particular its blunt section 23, can be manufactured by bulk forming or machining.

[0047] The features disclosed in the foregoing description, figures and claims can be important for the realization of the invention in its various embodiments, both individually and in any combination.

[0048] REFERENCE MARK LIST

[0049] 1 full metal jacket bullet

[0050] 3-round shell

[0051] 5 Rear core

[0052] 7 Penetration core

[0053] 9 Diameter regression

[0054] 11 surrounding annular space

[0055] 13 Ogiform section

[0056] 15 Cylinder section

[0057] 17 Core part

[0058] 19 front tip

[0059] 21 Sleeve part

[0060] 23 Stump section

[0061] 25 ogee-shaped outer contour

[0062] 27 End face d Diameter a Length a Angle t Wall thickness

[0063] L Floor longitudinal direction

Claims

SwissP Defense AG R31240WO SKIYI / P REQUIREMENTS 1. Penetrator full metal jacket bullet (1), in particular with a caliber of less than 20 mm, in particular of less than 12 mm or of less than 9 mm, comprising a bullet jacket (3), a front-facing penetration core (7) arranged in the bullet jacket (3), in particular made of steel or hardened metal, and a rear-facing tail core (5) arranged in the bullet jacket (3), characterized in that the penetration core (7) has a diameter reduction (9) on its circumferential surface facing the bullet jacket (3) at the rear, such that an annular space (11) is formed between the penetration core (7) and the bullet jacket (3), into which the tail core (5) projects.

2. Full metal jacket bullet (1) according to claim 1 , characterized in that the diameter step-back (9) has a dimension (t) of less than 1 mm, in particular less than 0.75 mm or less than 0.5 mm, and / or is less than 10%, in particular less than 9% or less than 8% of a maximum diameter of the full metal jacket bullet (1).

3. Full metal jacket bullet (1) according to claim 1 or 2, characterized in that the bullet jacket (3) has a front ogive section (13) and a rear cylinder section (15) for engaging in the rifling profile of a firearm barrel and the rear core (5) extends at most to a transition from the ogive section (13) into the cylinder section (15).

4. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that the penetration core (7) has a core part (17) adjoining the diameter reduction (9) at the rear, in particular a cylindrical core part, which has a length (a) in the longitudinal direction (L) of the projectile of at most 50%, in particular of at most 40%, at most 30% or at most 25% of a total length of the penetration core in the longitudinal direction (L).

5. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that the penetration core (7) is produced by bulk forming.

6. Penetrator full metal jacket bullet (1), in particular according to one of the preceding claims, in particular with a caliber of less than 20 mm, in particular of less than 12 mm or less than 9 mm, comprising a bullet jacket (3), a front-facing penetration core (7) arranged in the bullet jacket (3), in particular made of steel or hardened metal, and a rear-facing tail core (5) arranged in the bullet jacket (3), wherein the bullet jacket (3) has a front-facing ogive section (13) and a rear-facing cylindrical section (15) for engaging the rifling profile of a firearm barrel, characterized in that the tail core (5) extends at most to a transition from the ogive section (13) into the cylindrical section (15) and the penetration core (7) bears full surface contact with the bullet jacket (3) along the ogive section (13).

7. Full metal jacket projectile (1) according to claim 6, characterized in that the penetration core (7) is undersized at the rear in relation to the projectile jacket (3) such that a particularly circumferential annular space (11) is formed between the penetration core (7) and the projectile jacket (3), into which the rear core (5) projects, in particular which is substantially completely filled by the rear core (5).

8. Full metal jacket bullet (1) according to claim 7, characterized in that the tail core (5) has a sleeve part (21) encasing the penetration core (7) which has a length (a) in the longitudinal direction (L) of the bullet of at most 60%, in particular of at most 55%, at most 50% or at most 45% of a total length of the tail core in the longitudinal direction (L).

9. Penetrator full metal jacket bullet (1), in particular according to one of the preceding claims, in particular with a caliber of less than 20 mm, in particular of less than 12 mm or less than 9 mm, comprising a bullet jacket (3), a front-facing penetration core (7) arranged in the bullet jacket (3), in particular made of steel or hardened metal, and a rear-facing penetration core arranged in the Projectile jacket (3) arranged rear core (5), characterized in that the penetration core (7) is produced by bulk forming.

10. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that the penetration core (7) is made of a material with a hardness of at least 55 HRC and / or at most 66 HRC and / or the tail core (5) is made of a material with a hardness of at most 160 N / mm² 2 is manufactured.

11. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that wherein a weight fraction of the penetration core to the total bullet weight is at least 20% and / or at most 50% and / or wherein an axial length of the penetration core in the longitudinal direction of the bullet (L) is less than 60%, in particular less than 55%, of a total bullet length in the longitudinal direction of the bullet (L).

12. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that the tail core (5) comprises tin, a tin alloy, in particular a tin-bismuth alloy, zinc, a zinc alloy and / or plastic, in particular is made thereof.

13. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that the penetration core (7) has a frontal tip (19) with a tip angle (a) in the range of 70° to 120°.

14. Full metal jacket bullet (1) according to one of the preceding claims, characterized in that the penetration core (7) has a frontal blunt section (23) with an ogival outer contour (25) and / or an end face (27) oriented perpendicular to the longitudinal direction.

Images