Firearm cartridges, cartridge chambers, combinations of the breech and cartridge chamber of such firearms, and firearms

Abstract

The invention relates to a cartridge for a firearm, comprising a cartridge case implemented in the manner of a bottleneck case for receiving a projectile, the cartridge case having a total length (L3) between 37.50 mm (1.4764 in) and 40.50 mm (1.5945 in), preferably between 38.50 mm (1.5157 in) and 39.50 mm (1.5551 in), particularly preferably 39.00 mm (1.5354 in), the length of the case neck, i.e. the case neck length (L3-L2), being selected such that the ratio of the diameter (G1) of the projectile (8) to the case neck length (L3-L2) is between 1.19 and 1.36, preferably between 1.26 and 1.36, particularly preferably between 1.26 and 1.27. The invention further relates to a cartridge chamber, a combination of a breech and a cartridge chamber for such a firearm, and to a firearm.

Description

Technical Field

[0001] The present invention relates to a firearm cartridge, a cartridge chamber, a combination of a breech and a cartridge chamber of such a firearm, and a firearm, particularly as per the independent claims.

Background Art

[0002] The present invention relates to a novel cartridge, particularly an intermediate rifle cartridge, or a rimless rifle cartridge having a center-fire primer, specially devised and optimized for handguns and support weapons for military and police operations in urban environments, and for use with subsonic and supersonic ammunition. An intermediate rifle cartridge has dimensions intermediate between pistol cartridges and rifle cartridges, enabling controllable single-shot or automatic firing from a handgun while having sufficient range distance and firing energy for the purpose. The engineering design aimed to maximize potential internal and external ballistic performance parameters.

[0003] Well-known and one of the most reliable and well-tested designs for combat in urban environments is the 7.62 mm × 39 (M43) cartridge with a related handgun system. Well-known handgun systems for firing this cartridge include the Avtomat Kalashnikova 47 assault rifle (AK-47).

[0004] The AK-47 system, chambered in 7.62mm x 39 (M43), has been the greatest potential threat to Western countries and NATO for over 75 years. This is due to its widespread global availability, low purchase price, relatively small external dimensions, and light weight of the weapon system and cartridge, resulting in relatively less shooter fatigue. The effectiveness of this cartridge is considered sufficient for the aforementioned application scenarios. The 7.62mm x 39 (M43) cartridge was developed in Germany (Genschoff, Karlsruhe-Berlin) in the 1930s for the Vollmer M35 assault rifle system in Biberach, and the design was announced in the Soviet Union in 1943.

[0005] Military small arms with a caliber of 7.62mm × 51 can also fire projectiles in the subsonic and supersonic ranges. However, such weapons are only suitable as support weapons combined with highly dynamic strategic tactics due to the significantly heavy weight of the small arms and ammunition.

[0006] Compared to weapon systems for shorter cartridges (such as the AK-47), the breech time (automatic loading time) is longer, and the recoil is stronger, leading to greater shooter fatigue and hindering rapid and accurate firing. Finally, the internal volume of the 7.62mm × 51 caliber case is not optimally designed for subsonic ammunition due to the relatively large cartridge case, which can lead to mechanical problems and reduced accuracy in the weapon. [Overview of the Initiative]

[0007] Therefore, an object of the present invention is to disclose a firearm cartridge that can eliminate the user-oriented gap in capabilities, particularly in operations in urban environments, between the known 7.62mm × 39 (M43) cartridge and the 7.62mm × 51 cartridge, which are based on intermediate rifle cartridges. In the supersonic range, it can perform superiorly to all equivalent cartridges associated with military and police (such as the 5.56mm × 45 cartridge and the 7.62mm × 35 cartridge) at typical combat distances in urban environments, under otherwise identical conditions. In particular, a cartridge chamber, a combination of the breech and cartridge chamber of such a firearm, and a firearm capable of firing the cartridge according to the present invention are disclosed, with unilateral backward compatibility with the 7.62mm × 39 (M43) caliber cartridge also ensured.

[0008] The (length) data according to this invention are expressed in millimeters [mm] and inches ["] in parentheses.

[0009] This objective is achieved by a firearm invention cartridge comprising a cartridge case implemented in the manner of a bottleneck case for receiving a projectile, wherein the cartridge case has an overall length (L3) between 37.50 mm (1.4764 inches) and 40.50 mm (1.5945 inches), preferably between 38.50 mm (1.5157 inches) and 39.50 mm (1.5551 inches), and particularly preferably between 39.00 mm (1.5354 inches), and the length of the case neck of the cartridge, i.e., the case neck length (LE-L2), is selected such that the ratio of the projectile diameter (G1) to the case neck length (L3-L2) of the cartridge case is between 1.19 and 1.36, preferably between 1.26 and 1.36, and particularly preferably between 1.26 and 1.27. This ratio is the quotient of the projectile diameter (G1) to the case neck length (L3-L2).

[0010] The case neck length is the difference between value L3 (total length of the cartridge case) and value L2 (length of the case from the shoulder to the neck).

[0011] The case neck length, i.e., the case neck length (L3-L2), may be between 5.81 mm (0.2287 inches) and 6.61 mm (0.2602 inches).

[0012] The Permanent International Committee for Firearms Testing (CIP) sets the average maximum allowable gas pressure (Pmax) at 4400 bar (638176 psi), representing the maximum value according to CIP. The Society of Sporting Arms and Ammunition Manufacturers (SAAMI) sets the average maximum allowable gas pressure (Pmax) at 5515 bar (80000 psi). Such high gas pressures significantly improve ballistic power and thermal efficiency compared to existing intermediate rifle cartridges.

[0013] The cartridge according to the present invention may be a rimless rifle cartridge having a centerfire primer. This cartridge has a case having an extractor groove. bottom And, case bottom It comprises a case body connected to a shoulder cone, the case body transitioning to a case neck for receiving the projectile.

[0014] When referring to dimensions according to the present invention, such as L1, L2, L3, G1 of a cartridge or cartridge chamber, or to known cartridges, it means dimensions, sizes, tolerances, measurements, and terminology used in accordance with the typical rules of the aforementioned Permanent International Commission for Certification of Small Arms (CIP). According to the present invention, the angle of the shoulder cone is usually indicated in half-angles in accordance with the Association of Sporting Arms and Ammunition Manufacturers (SAMMI). In the drawings (Figures 5 and 6), the angle of the shoulder cone is depicted in accordance with CIP.

[0015] The cartridge according to the present invention is: - They may be fired from military small arms and support weapons having relatively short barrels, preferably compact ones, without excessively impairing performance and with minimal wear on the weapon system. - In terms of ballistic effectiveness (accuracy, range, and energy transfer), it may be superior to equivalent intermediate rifle cartridges such as the 7.62mm × 35 and 7.62mm × 39 (M43) cartridges. -It may be suitable for firing the heaviest projectile in its caliber range at subsonic speeds, and, when combined with the use of a silencer, may contribute to a significant reduction in the unmasking coefficient. -The cartridge chamber may be designed with a special shape to allow the firing of 7.62mm x 39 (M43) cartridges (backward compatible). In this case, the projectile may have relatively high, above-average accuracy due to the optimal design of the projectile transition section. -The shape of the cartridge according to the present invention may be designed so that the cartridge cannot be fired from a weapon system with a caliber of 7.62mm × 39 (M43) (unilateral backward compatibility).

[0016] The cartridge length L6 is preferably between 55.00 mm (2.165 inches) and 57.00 mm (2.244 inches), preferably between 55.70 mm (2.1929 inches) and 56.30 mm (2.2165 inches), and particularly preferably 56.00 mm (2.2047 inches). The cartridge chamber according to the present invention can fire 7.62 mm × 39 (M43) cartridges in addition to the cartridge according to the present invention, ensuring that projectiles can be fired with above-average accuracy. This high-accuracy capability is achieved by the projectile transition section of the cartridge chamber, which is designed with higher accuracy from a modern perspective.

[0017] The diameter of the projectile is preferably between 7.85 mm (0.309 inches) and 7.92 mm (0.312 inches), and more preferably exactly 7.92 mm (0.312 inches), and the diameter of the case neck (H1) is preferably 8.60 mm (0.3386 inches).

[0018] bottomFrom the shoulder cone to the transition portion to the case neck, the length L2 is preferably between 31.69 mm (1.2476 inches) and 33.89 mm (1.3343 inches), preferably between 32.29 mm (1.2713 inches) and 33.29 mm (1.3106 inches), and particularly preferably may be 32.79 mm (1.2909 inches).

[0019] The shoulder cone is preferably connected to the case neck and may transition to the case body of the cartridge case. The case body is connected to the extractor groove of the cartridge. Preferably, it is mounted to have a conical taper in the direction from the extractor groove towards the shoulder cone. The case body has a diameter (P1) of 11.35 mm (0.4469 inches) at the connection to the extractor groove and, at the connection to the shoulder cone, has a diameter (P2) between 10.07 mm (0.3965 inches) and 11.350 mm (0.4469 inches), preferably between 10.45 mm (0.4114 inches) and 11.00 mm (0.4331 inches), and particularly preferably 10.773 mm (0.4241 inches). At the bottom The case body is connected to the extractor groove of the cartridge. Preferably, it is mounted to have a conical taper in the direction from the extractor groove towards the shoulder cone. The case body has a diameter (P1) of 11.35 mm (0.4469 inches) at the connection to the extractor groove and, at the connection to the shoulder cone, has a diameter (P2) between 10.07 mm (0.3965 inches) and 11.350 mm (0.4469 inches), preferably between 10.45 mm (0.4114 inches) and 11.00 mm (0.4331 inches), and particularly preferably 10.773 mm (0.4241 inches).

[0020] This feature also achieves one-way downward compatibility with the 7.62 mm × 39 (M43) cartridge. Such a cartridge can thereby also be fired in the cartridge chamber provided in the cartridge according to the present invention or in a firearm equipped with such a cartridge chamber.

[0021] The preferred diameter P2 of 10.773 mm (0.4241 inches) results in a case volume that is approximately 7% larger than the case volume of the 7.62 mm × 39 (M43) cartridge.

[0022] The cartridge includes a primer. The primer is preferably a boxer center fire primer or a Berdan primer.

[0023] According to one embodiment of the cartridge, a transition portion from the case body to the shoulder cone has a radius (r1 min ) of 1.50 mm (0.0591 inch), and a transition portion from the shoulder cone to the case neck has a radius (r2) of 1.50 mm (0.0591 inch).

[0024] The shoulder cone is mounted to have a conical taper toward the case neck and has a half angle of 20 degrees to 42.5 degrees, preferably between 20 degrees and 30 degrees, and particularly preferably 25 degrees.

[0025] The present invention further relates to a cartridge chamber of a firearm, the cartridge chamber having a cartridge space, the cartridge space having a case neck to which a shoulder cone is connected and which transitions to the case body, and the cartridge chamber being complementarily mounted to receive, in addition to the cartridge according to the present invention, a 7.62 mm × 39 (M43) cartridge.

[0026] The ratio of the projectile diameter G1 to the case neck length (L3-L2) of the cartridge according to the present invention may also be used for cartridge chambers implemented as a complement to the cartridge. Herein, the difference between the length of the cartridge chamber up to length L3, i.e., diameter H2, and the length of the cartridge chamber up to length L2, i.e., diameter H1, is taken. The difference between L3 and L2 may be selected such that the ratio of the diameter of the projectile transition section (G1; diameter at the starting point of the rifling transition section of the cartridge chamber) to the difference L3-L2 is between 1.13 and 1.27, preferably 1.19. As a result, the length L3 of the cartridge chamber up to diameter H2 may be between 37.80 mm (1.4882 inches) and 40.80 mm (1.6063 inches), preferably between 38.50 mm (1.5157 inches) and 40.00 mm (1.5748 inches), preferably between 39.00 mm (1.5354 inches) and 39.50 mm (1.5551 inches), and particularly preferably 39.30 mm (1.5472 inches), and the diameter G1 of the projectile transition section may be 7.95 mm (0.313 inches). This ratio brings about the advantages of the present invention that have already been described with respect to the cartridge.

[0027] As a result, the cartridge chamber is mounted to have shoulder contact such that the shoulder cone of the cartridge according to the present invention in the cartridge chamber contacts the complementary shoulder cone of the cartridge chamber.

[0028] The diameter of the case neck (H1) may be 8.64 mm (0.3402 inches), and the cartridge chamber preferably has a radius (r1) of 1.00 mm (0.0394 inches) at the transition (α) from the case body to the shoulder cone. max) may have a radius (r2) of 2.00 mm (0.0787 inches) at the transition from the shoulder cone to the case neck. Combined with further design features of the cartridge chamber as described above with respect to the corresponding radius of the shoulder cone provided on the cartridge, not only the cartridge according to the present invention but also 7.62 mm × 39 (M43) caliber cartridges can be fired from the cartridge chamber according to the present invention.

[0029] The present invention further relates to a combination of a breech and a cartridge chamber of a firearm, wherein the cartridge chamber is, breech Clearance (Fe), i.e., the case of the cartridge bottom The gap between the breech and the closed breech of the firearm is designed to be complementary to the cartridge that is mounted according to the present invention and introduced into the cartridge chamber, being between 0.00 mm (0.00 inch) and 0.15 mm (0.006 inch). Therefore, breech The clearance may be 0.10 mm (0.004 inches) for the cartridge according to the present invention, or 0.15 mm (0.006 inches) for a cartridge with a diameter of 7.62 mm × 39 (M43).

[0030] The present invention further relates to a firearm including a cartridge chamber according to the present invention, or a combination of a breech and a cartridge chamber according to the present invention. The firearm may be a small arms such as a handgun or sidearm, a submachine gun, or a machine gun.

[0031] The present invention is described in more detail below with reference to the drawings, along with a description of preferred embodiments. [Brief explanation of the drawing]

[0032] [Figure 1] An embodiment of the cartridge according to the present invention. [Figure 2] An embodiment of the cartridge chamber according to the present invention. [Figure 3] A cross-sectional view of a cartridge according to the present invention inserted into a cartridge chamber according to the present invention with the breech closed. [Figure 4] A schematic diagram of a potential firearm according to the present invention. [Figure 5] Dimensions of a preferred embodiment of the cartridge according to the present invention. [Figure 6] Dimensions of a preferred embodiment of the cartridge chamber according to the present invention. [Figure 7] A technical cross-sectional view of a cartridge according to the present invention (top of the drawing) inserted into a cartridge chamber according to the present invention, and a cartridge with a bore diameter of 7.62 × 39 (M43) (bottom of the drawing). [Modes for carrying out the invention]

[0033] Figure 1 shows one embodiment of the cartridge 1 according to the present invention. The cartridge 1 according to the present invention is mounted in a bottleneck case configuration, such as a rimless rifle cartridge having a centerfire primer, and has an extractor groove 3. bottom The projectile comprises a case body 4 connected to an extractor groove 3 for receiving propellant, the case body 4 transitioning to a case neck 6 via a shoulder cone 5, and the case mouth 7 of the case neck 6 receiving the projectile 8. As is evident, the case body is tapered in a conical shape toward the projectile 8. The shoulder cone 5 is similar.

[0034] As shown in Figure 5 (dimensions in mm), one potential preferred embodiment (best embodiment) of the cartridge (maximum dimensions) according to the present invention may be as follows:

[0035] The case length to the shoulder (L1) is specified as 30.456 mm (1.199 inches). The case length to the shoulder / neck transition (L2) is 32.786 mm (1.291 inches). The total case length (L3) is 39.00 mm (1.535 inches), and the maximum cartridge length (L6) is 56.00 mm (2.205 inches).

[0036] case bottom The dimensions are as follows: Rim height (R) is 1.50 mm (0.059 inches). Rim diameter (R1) is 11.35 mm (0.447 inches). Case bottom The height (E) is 3.20 mm (0.126 inches). The diameter of the extractor groove (E1) is 9.56 mm (0.376 inches). The height of the extractor groove (e min) is 1.00 mm (0.039 inches). The bevel angle of the extractor groove (δ) is 51 degrees 58 minutes 12 seconds. The length of the rim bevel (f) is 0.25 mm (0.010 inches). The bevel angle of the rim (β) is 45 degrees.

[0037] The diameter of the powder chamber at the transition point from the case body to the extractor groove (P1) is 11.35 mm (0.447 inches), and the diameter at the transition point from the shoulder cone to the case neck (P2) is 10.773 mm (0.424 inches).

[0038] The dimensions of the shoulder cone are defined as follows: The shoulder angle (α) has a half-angle of 25 degrees. The length to the apex of the shoulder angle (S) is 42.007 mm (1.654 inches). The transition from the case body to the shoulder cone has a radius (r1) of 1.50 mm (0.059 inches). min A 1.50 mm (0.059 inch) radius (r2) is provided at the transition from the shoulder cone to the case neck.

[0039] By setting the case dimensions within the functional design limits, the propellant volume can be maximized, the powder column can be lowered, and the propellant can burn more uniformly, resulting in the ability to design the internal and external ballistic performance to its fullest potential.

[0040] The aforementioned design also positively affects the variation in muzzle velocity v0 and thus the accuracy in the supersonic and subsonic regions. In particular, firearms equipped with silencers are inherently more prone to contamination than those without silencers, which significantly impacts the reliability of the firearm. Therefore, more uniform and better combustion of the propellant is extremely important, especially in firearms with silencers. Furthermore, the case shoulder design also extends the case neck length (L3-L2).

[0041] The diameter at the shoulder / neck transition (H1) and the diameter at the case mouth (H2) are both 8.60 mm (0.339 inches).

[0042] The projectile diameter (G1) in the case mouse is 7.92 mm (0.312 inches). The length to the land diameter (L3+G) is 47.30 mm (1.862 inches). Figure 2 shows an embodiment of the cartridge chamber 10 shown in Figure 1, mounted complementary to cartridge 1 and having shoulder contact.

[0043] As shown in Figure 6 (dimensions in mm), one potential preferred embodiment (best embodiment) of the cartridge chamber (minimum dimensions) according to the present invention may be as follows:

[0044] The length of the cartridge chamber up to diameter P2 (L1) is 30.323 mm (1.194 inches). The length of the cartridge chamber up to diameter H1 (L2) is 32.643 mm (1.285 inches). The length of the cartridge chamber up to diameter H2 (L3) is specified as 39.30 mm (1.547 inches).

[0045] The distance (E) from the breech block to the entrance of the cartridge chamber is 3.20 mm (0.126 inches). The diameter (P1) of the entrance of the cartridge chamber or at distance E is 11.38 mm (0.448 inches). The diameter (P2) at the starting point of the shoulder cone at distance L1 is 10.803 mm (0.425 inches).

[0046] The half-angle (α) of the shoulder cone is 25 degrees. The length (S) to the apex of the shoulder cone is 41.907 mm (1.65 inches). The radius of the transition at the end of diameter P2 is (r1) max The diameter is 1.00 mm (0.039 inches), and the radius at the transition from the shoulder cone to the case neck is 2.00 mm (0.0787 inches).

[0047] Cartridge chamber radius (r1 max (and r2) are the respective radii of the cartridge (r1 max Due to the differences between and r2), it is specially designed to ensure maximum reliability. When a 7.62mm × 39 (M43) cartridge is fired from the cartridge chamber according to the present invention, in addition to other design features, precisely defined breech The clearance is formed by the respective radii r2 of the cartridge (the cartridge according to the present invention and the 7.62 mm × 39 (M43) cartridge) and the cartridge chamber according to the present invention.

[0048] The diameter (H1) of the shoulder cone at the starting point at distance L2 is 8.64 mm (0.34 inches). The diameter (H2) at distance L3 is 8.63 mm (0.34 inches).

[0049] The diameter (G1) at the start of the rifling transition is 7.95 mm (0.313 inches), and the distance (G) between H2 and F is 8.301 mm (0.327 inches). The angle (α1) of the transition between H2 and G1 is 90 degrees. The distance (h) between H2 and G1 is 0.34 mm (0.013 inches). The length (s) between the cylindrical transition and the neck bevel is 2.00 mm (0.079 inches). The half-angle of the bevel at the rifling transition is 1.5 degrees.

[0050] The barrel bore diameter (F) is 7.62 mm (0.300 inches), and the barrel groove diameter (Z) is 7.92 mm (0.312 inches).

[0051] The maximum capacity of the cartridge in the cartridge chamber according to the present invention breech The clearance (Fe) is specified as 0.10 mm (0.004 inches).

[0052] 0.10mm (0.004 inch) breech According to CIP, the clearance is the maximum permissible mean gas pressure (Pmax) of a centerfire rifle cartridge with a maximum permissible mean gas pressure (Pmax) exceeding 3800 bar (55115 psi). breech This is the clearance. When a 7.62mm x 39 (M43) cartridge is loaded into the cartridge chamber according to the present invention, the maximum breech The clearance (Fe) is the legally defined maximum clearance of 0.15 mm (0.006 inches) allowed for a centerfire rifle cartridge at a maximum allowable mean gas pressure (Pmax) up to 3800 bar (55115 psi). breech This is the clearance (Fe). The corresponding maximum clearance differs between the cartridge according to the present invention and the 7.62 mm × 39 (M43) cartridge. breech The clearance design is unique and contributes to maximizing the functional reliability of the firearm even under adverse conditions.

[0053] Figure 3 is a cross-sectional view of the combination of the breech and cartridge chamber of the firearm according to the present invention, passing through the longitudinal central axis of the cartridge 1, and the scale is not indicated. The cartridge 1 may be mounted as shown in Figure 1, and the cartridge chamber 10 may be mounted as shown in Figure 2.

[0054] breech Clearance (Fe), i.e., the case of the cartridge bottom The distance between the gun barrel and the closed breech of the firearm is, according to the present invention, between 0.00 mm (0.00 inch) and 0.15 mm (0.006 inch).

[0055] Furthermore, Figure 4 shows a schematic diagram of a potential firearm 12. The firearm may be implemented as a support weapon such as a machine gun and may have the subject shown in Figure 3.

[0056] Figure 7 is a technical cross-sectional view of a cartridge according to the present invention (top of the drawing) inserted into a cartridge chamber according to the present invention, and a cartridge with a bore diameter of 7.62 × 39 (M43) (bottom of the drawing). From the depiction of the top, it can be seen that the contour of cartridge 1 according to the present invention fits closely into the cartridge chamber 10 according to the present invention (see detail E), that is, its outer contour fits snugly into the complementary inner contour of the cartridge chamber 10, by 0.10 mm (0.004 inches). breech It is clear that this constitutes the clearance (Fe) (see Details I).

[0057] From the depiction and detail F of the lower part, the 7.62mm x 39 (M43) cartridge also has a 0.15mm (0.006 inch) diameter as precisely defined herein. breech It is clear that the cartridge can be loaded into and fired from the cartridge chamber according to the present invention while maintaining clearance. This is particularly due to the retractable design for backward compatibility according to the present invention.

[0058] The cartridge according to the present invention is superior to the known cartridges described above due to its significantly higher effectiveness in the ultrasonic range, along with its unilateral backward compatibility with the 7.62mm × 39 (M43) cartridge and associated cartridge chamber, which share common maximum performance parameters and the ability to fire projectiles in the subsonic range. Thus, the previously existing capability gap can be filled by the subject matter of the present invention. Firearms according to the present invention having the cartridge and cartridge chamber according to the present invention enable greater endurance and survivability by significantly increasing strategic and tactical options, and contribute to surviving the most intense, complex, and extreme gun battles in urban environments. [Explanation of Symbols]

[0059] 1 cartridge 2 cases bottom 3 Extractor groove 4. Case body 5 Shoulder cones 6 Case Neck 7 Case Mouse 8 projectiles 9 Cartridge space 10 Cartridge Chambers 11. Brisk 12 Firearms Cartridge reference symbol L1 Length to shoulder cone L2 Shoulder cone / Case neck transition length L3 Case Length L6 Cartridge Length / Overall Length R rim height R1 Rim Diameter E1 Extractor groove diameter E Case bottom height f Rim bevel length β Rim bevel angle δ Extractor groove bevel angle P1 Diameter at the transition point between the case body and the extractor groove P2 Diameter at the shoulder cone / case neck transition. α Shoulder cone angle S Shoulder cone angle: length to the apex r1 min Shoulder radius r2 Neck radius H1 Diameter at the shoulder cone / neck transition Diameter in H2 case mice Projectile diameter in G1 case mouse Cartridge Chamber Reference Symbol L1 is the length of the cartridge chamber up to the diameter P2. L2 is the length of the cartridge chamber up to the diameter H1. L3 is the length of the cartridge chamber up to the diameter H2. R: Distance from the breech block to the rear end of the barrel R1 Diameter of the breech block E: Distance from the breech block to the entrance of the cartridge chamber. P1 Diameter at the entrance or distance E of the cartridge chamber P2 Diameter at the starting point of the shoulder cone at distance L1 α Shoulder cone angle S: Length to the top of the shoulder cone r1 max Radius of the transition at the end of diameter P2 r2 Radius of the transition area at the case neck H1 Diameter at the starting point of the case neck at distance L2 H2 Diameter at distance L3 G1 Diameter at the starting point of the transition section of the spiral Distance between G H2 and F i. Half-angle of the inclination at the transition point of the spiral F: Inner diameter of the gun barrel Z barrel groove diameter

Claims

1. A cartridge case is provided which is implemented in the manner of a bottleneck cartridge case to receive the projectile (8), The cartridge case has an overall length (L3) of 38.50 mm (1.5157 inches) to 40.50 mm (1.5945 inches), and the length (L2) from the bottom of the case to the transition section (H1) from the shoulder cone (5) to the case neck (6) is 32.29 mm (1.2713 inches) to 33.29 mm (1.3106 inches). The case neck length, i.e., the case neck length (L3-L2), is selected such that the ratio of the diameter (G1) of the projectile (8) to the case neck length (L3-L2) is between 1.26 and 1.

36. The shoulder cone (5) is connected to the case neck (6) and transitions to the case body (4) of the cartridge case, the case body (4) is connected to the extractor groove (3) of the cartridge (1) at the bottom (2) of the case, and is mounted to have a conical taper in the direction from the extractor groove (3) toward the shoulder cone (5), and the case body (4) has a diameter (P2) of 10.07 mm (0.3965 inches) to 11.350 mm (0.4469 inches) at the connection point to the shoulder cone (5), the cartridge (1) of a firearm (12).

2. The cartridge (1) according to claim 1, wherein the cartridge case is mounted as a rimless rifle cartridge having a centerfire primer.

3. The cartridge (1) according to claim 1 or 2, wherein the diameter (G1) of the projectile (8) is 7.85 mm (0.309 inches) to 7.92 mm (0.312 inches), and the diameter (H1) of the case neck is 8.60 mm (0.3386 inches).

4. The cartridge (1) according to claim 1 or 2, wherein the length of the case neck (L3-L2) is 5.81 mm (0.2287 inches) to 6.61 mm (0.2602 inches).

5. The cartridge (1) according to claim 1 or 2, wherein the maximum overall length (L6) of the cartridge (1) is 55.00 mm (2.165 inches) to 57.00 mm (2.244 inches).

6. The cartridge (1) according to claim 1 or 2, wherein the case body (4) has a diameter (P1) of 11.35 mm (0.4469 inches) at the connection portion to the extractor groove (3).

7. A radius of 1.50 mm (0.0591 inches) (r1) is provided at the transition from the case body (4) to the shoulder cone (5). ｍｉｎ The cartridge (1) according to claim 1, wherein a ) is provided, and a radius (r2) of 1.50 mm (0.0591 inches) is provided at the transition from the shoulder cone (5) to the case neck.

8. The cartridge (1) according to claim 6, wherein the shoulder cone (5) is mounted with a conical taper toward the case neck (6) and has a half-angle (α) of 20 to 42.5 degrees.

9. A cartridge chamber (10) of a firearm (12), The cartridge chamber (10) has a cartridge space (9), the cartridge space has a case neck (6) to which a shoulder cone (5) is connected and which transitions to a case body (4) of the cartridge space (9), and the cartridge chamber (10) is complementaryly mounted to receive the cartridge (1) according to claim 1 or 2.

10. The length (L3) of the cartridge chamber (10) up to the diameter H2 is between 38.50 mm (1.5157 inches) and 40.80 mm (1.6063 inches). The cartridge chamber (10) according to claim 9, wherein the difference between the length L3 and the length L2 of the cartridge chamber (10) is selected such that the ratio of the diameter of the projectile transfer section (G1) to the difference between L3 and L2 is from 1.13 to 1.

27.

11. The cartridge chamber (10) according to claim 9, wherein the cartridge chamber (10) is mounted such that the shoulder cone (5) of the cartridge (1) inserted into the cartridge chamber (10) has shoulder contacts such that the shoulder cone (5) of the cartridge chamber (10) is in complementary contact with the shoulder cone (5) of the cartridge chamber (10).

12. The diameter (H1) of the case neck is 8.64 mm (0.3402 inches), and the cartridge space (9) has a radius (r1) of 1.00 mm (0.0394 inches) at the transition from the case body (4) to the shoulder cone (5). ｍａｘ The cartridge chamber (10) according to claim 11, having a shoulder cone (5) and a radius (r2) of 2.00 mm (0.0787 inches) at the transition from the shoulder cone (5) to the case neck (6).

13. A combination of a breech (11) of a firearm (12) having a cartridge chamber (10) as described in claim 9, wherein the cartridge chamber (10) is mounted such that the breech clearance (Fe), i.e., the distance between the bottom of the case of the cartridge (1) and the closed breech (11) of the firearm (12), is 0.00 mm (0.000 inches) to 0.15 mm (0.006 inches) with respect to the cartridge (1) inserted into the cartridge chamber (10).

14. The combination according to claim 13, wherein the cartridge chamber (10) is capable of receiving a cartridge (1) of caliber 7.62 mm x 39 (M43), and the breech clearance (Fe) is between 0.00 mm (0.000 inches) and 0.15 mm (0.006 inches).

15. A firearm (12) comprising a cartridge chamber (10) as described in claim 9, The aforementioned firearm (12) is a small arms weapon such as a handgun or sidearm, a submachine gun, or a machine gun.

16. A firearm (12) comprising the combination of a breech (11) and a cartridge chamber (10) as described in claim 13, The aforementioned firearm (12) is a small arms weapon such as a handgun or sidearm, a submachine gun, or a machine gun.

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