SU546211A1 - Shot cartridge for shotgun - Google Patents

Abstract

THE RODGE FUNCTION CARTRIDGE, containing a sleeve with a grooved inner surface, primer-igniter, powder charge, wad and shot shot, is different from the fact that, in order to increase the initial shot shell speed without changing the powder charge value and improve the accuracy , in it on the inner surface of the liner in the area of the location of the wad and shotgun shells are made the spit of the knurling with a profile in the form of an isosceles triangle, and the knurling step is equal to 1/10 of the inner diameter of the liner, depth - 0.25-0.4 thickness of its wall. 2 Il.

Description

FIELD OF THE INVENTION The invention relates to ammunition for smooth, crimped hunting and sporting rifles, namely shotgun cartridges.

Known shotgun shotgun cartridge, in which the inner surface of the sleeve is made smooth.

The disadvantage of such a cartridge is the instability of the intra-ballistic characteristics due to the reduction of the inhibition of the shot and the pyz at the initial moment of the intra-ballistic process, which leads to incomplete utilization of the powder charge.

The closest technical solution is a shotgun rifle cartridge, in which the entire inner surface of the sleeve is grooved in the form of vertical and horizontal ridges.

Its disadvantage is that, while ensuring the strength of the connection of the element of the cartridge, it does not reliably absorb the powder charge.

The aim of the invention is to increase the utilization of powder charge and, consequently, increase the initial speed of the shot shell without changing the size of the powder charge and improving the accuracy of the bo patron.

This is achieved by the fact that on the inner surface of the liner in the area of the wad and shot shell there is a braid of a knurling with a profile of an isosceles triangle, the knurling step is 1/10 of the inner diameter of the liner, and the depth is 0.25 - 0 , 4 thickness of its wall.

Figure 1 shows a shotgun rifle cartridge, a longitudinal section; in Fig o 2 - sleeve, cross section.

The cartridge consists of a sleeve 1, kapsksh-ignitementep 2, powder

charge 3, covered with powder gasket 4, sealing off wads 4 from felt or plastic, shot shell 6 and cardboard pad 7, closing the shot.

At the same time, on the inner surface of the sleeve 1 there is a braid of a net knurling 8 with a profile of an isosceles triangle. The knurling pitch is 1/10 of the inner diameter of the liner, and the depth is 0.25-0.4 of its wall thickness.

When fired, the wakes 5 under the action of the pressure of the gases of the powder charge 3 are compressed, increasing in diameter.

and meshes with the rhombic projections of the oblique mesh knurling, 8 on the inner surface of the sleeve 1.

As a result, additional resistance is created at the initial moment of the dusk of the shot projectile 6, and an overlap of the interior space is provided, which contributes to a more complete combustion of the powder charge 3.

Due to such a construction of the inner surface of the liner, an increase in the utilization rate per unit weight of the charge, an increase in the initial shot velocity and an improvement in the accuracy of the bo are achieved.

1

Claims (2)

A shotgun cartridge containing a cartridge case with a corrugated inner surface, an ignition capsule 2, a powder charge, a wad and a shotgun shell, characterized in that, in order to increase the initial speed of the shotgun shell without changing the powder charge quantity and to improve the accuracy of the battle, it contains the inner surface of the sleeve in the area of the wad and shotgun made oblique mesh knurling with a section profile in the form of an isosceles triangle, while the knurling step is 1/10 of the inner diameter of the sleeve, and the depth is 0.25-0.4 then of tires of its wall. 2 ill.