23х152


#1

The cartridge case MP-6 or a variant of VYa-23.


#2

Hi!

From the dates on the hstps, 1940 or 41, and the morphology of the case bases, these cartridges are undoubtly VyA 23.

Cheers

PR


#3

Philippe, I thought that these 23x152 unbelted cases were unique to the MP-6 cannon; were these used in early stages of the VYa-23 cannon too?


#4

Right Fede, the first cases made were unbelted, as MP-6 but it seems that the positioning of the cartridge in the chamber was not perfect, probably due toi its length, so a small belt was added, which was adopted with the later VyA-23 gun.

The question remains: until when the unbelted cartridge was made?

PR


#5

Nudelman writes in his book that the momentum of forward movement was too high for the rimless case and that the belt was added to receive and compensate the forces.