Cartridge holder and Supply chamber

Cartridge holder noun - A metal frame or container holding cartridges; can be inserted into an automatic gun.

Supply chamber and cartridge holder are semantically related. In some cases you can use "Supply chamber" instead a noun phrase "Cartridge holder".

Supply chamber noun - A mechanical device for holding something and supplying it as needed.

Cartridge holder and supply chamber are semantically related. Sometimes you can replace phrase "Cartridge holder" with "Supply chamber", this phrases are similar.