Cartridge of a firearm, cartridge chamber, combination consisting of a lock and cartridge chamber of such a cartridge, and firearm
The invention relates to a cartridge of a firearm, comprising a cartridge case implemented in the manner of a bottleneck case for receiving a projectile, wherein the cartridge case has an overall length (L 3 ) of 37.50 mm (1.4764″) to 40.50 mm (1.5945″), preferably of 38.50 mm (1.5157″) to 39.50 mm (1.5551″), particularly preferably of 39.00 mm (1.5354″), and the length of the case neck—case neck length (L 3 -L 2 )—is selected such that the ratio of the diameter (G 1 ) of the projectile ( 8 ) to the case neck length (L 3 -L 2 ) 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. The invention further relates to a cartridge chamber, to a combination of breech and cartridge chamber of such a firearm, and to a firearm.
1 . A cartridge of a firearm comprising a cartridge case implemented in the manner of a bottleneck cartridge case for receiving a projectile, wherein the cartridge case has an overall length of 38.50 mm (1.5157″) to 40.50 mm (1.5945″), wherein the length from the bottom to the transition from a shoulder cone to case neck is 32.29 mm (1.2713″) to 33.29 mm (1.3106″),
wherein the length of the case neck is selected such that the ratio of the diameter of the projectile to the case neck length of the cartridge case is between 1.26 and 1.36, and
wherein the shoulder cone connects to the case neck and transitions into the case body of the cartridge case,
wherein the case body connects to an extractor groove of the cartridge at the case bottom and has a conical taper from the extractor groove toward the shoulder cone, such that the case body has a diameter of 10.07 mm (0.3965″) to 11.350 mm (0.4469″) at the connection to the shoulder cone, and
wherein the cartridge, when employed in weapons systems, demonstrates unilateral backward capability.
2 . The cartridge according to claim 1 , characterized in that the cartridge case is implemented as a rimless rifle cartridge having a centerfire primer.
3 . The cartridge according to claim 1 , characterized in that the diameter of the projectile is 7.85 mm (0.309″) to 7.92 mm (0.312″).
4 . The cartridge according to claim 1 , characterized in that the length of the case neck is 5.81 mm (0.2287″) to 6.61 mm (0.2602″).
5 . The cartridge according to claim 1 , characterized in that the maximum overall length of the cartridge is 55.00 mm (2.165″) to 57.00 mm (2.244″).
6 . The cartridge according to claim 5 , characterized in that the maximum overall length of the cartridge is 55.70 mm (2.1929″) to 56.30 mm (2.165″).
7 . The cartridge according to claim 1 , characterized in that the case body has a diameter (P 1 ) of 11.35 mm (0.4469″) at the connection to the extractor groove ( 3 )).
8 . The cartridge according to claim 1 , characterized in that a radius (r 1 min ) of 1.50 mm (0.0591″) is provided at the transition from the case body to the shoulder cone and a radius (r 2 ) of 1.50 mm (0.0591″) is provided at the transition from the shoulder cone to the case neck.
9 . The cartridge according to claim 1 , characterized in that the shoulder cone is implemented having a conical taper toward the case neck and a half angle of 20° to 42.5°.
10 . The cartridge according to claim 9 , characterized in that the shoulder cone is implemented having a conical taper toward the case neck and a half angle (α) of 20° to 30°.
11 . The cartridge according to claim 1 , wherein the cartridge case has an overall length of 38.50 mm (1.5157″) to 39.50 mm (1.5551″), and the length of the case neck is selected such that the ratio of the diameter of the projectile to the case neck length of the cartridge case is between 1.26 and 1.27.
12 . The cartridge according to claim 1 , wherein the length from the bottom to the transition from shoulder cone to case neck is 32.79 mm (1.2090″).
13 . The cartridge according to claim 7 , characterized in that the case body has a diameter of 10.45 mm (0.4114″) to 11.00 mm (0.4331″) at the connection to the shoulder cone.
14 . A cartridge chamber of a firearm, wherein the cartridge chamber has a cartridge space comprising a case neck to which a shoulder cone connects and transitions into the case body of the cartridge space, wherein the cartridge space is implemented complementarily for receiving a cartridge according to claim 1 .
15 . The cartridge chamber according to claim 14 , characterized in that the length of the cartridge chamber up to the diameter H 2 is 38.50 mm (1.5157″) to 40.80 mm (1.6063″), and the difference between the overall length and the length from the bottom to the transition from a shoulder cone to case neck of the cartridge chamber is selected such that the ratio of the diameter of the projectile transition to the difference between the overall length and the length from the bottom to the transition from a shoulder cone to case neck is 1.13 to 1.27.
16 . The cartridge chamber according to claim 14 , characterized in that the cartridge chamber is implemented having shoulder contact, so that the shoulder cone of a cartridge inserted into the cartridge chamber contacts the complementary shoulder cone of the cartridge chamber.
17 . The cartridge chamber according to claim 16 , characterized in that the diameter of the case neck is 8.64 mm (0.3402″), and the cartridge space has a radius (r 1 max ) of 1.00 mm (0.0394″) at the transition from the case body to the shoulder cone and a radius (r 2 ) of 2.00 mm (0.0787″) at the transition from the shoulder cone to the case neck.
18 . A combination of a breech and a cartridge chamber of a firearm comprising a cartridge chamber according to claim 14 , characterized in that the cartridge chamber is implemented such that a breech clearance, that is the spacing between the case bottom of the cartridge and the closed breech of the firearm, is 0.00 mm (0.000″) to 0.15 mm (0.006″) for the cartridge.
19 . The combination according to claim 18 , characterized in that the cartridge chamber is capable of receiving a cartridge ( 1 ) of caliber 7.62 mm×39 (M43), wherein the breech clearance is between 0.00 mm (0.000″) and 0.15 mm (0.006″).
20 . A firearm comprising a cartridge chamber according to claim 14 or a combination of a breech and the cartridge chamber, wherein the firearm is preferably a handgun, a small arm, such as a sidearm, a submachine gun, or a machine gun, or a combination thereof.