Help with identifiyng cartridges

[RCS]

During the early 60's military 7,62mm NATO was difficult to buy surplus and commercial ammo was expensive. Some decided to converted the Israeli 7,92mm to 7,62mm. It was boxed in 20 rd cardboard and sold at gun shows around the Chicago area.

Later on this was also done to make 7,62x39mm from other calibers tooAttachment 92529Attachment 92530Attachment 92531