The INERT Kynoch 400 Nitro refers to a specific type of ammunition cartridge utilized primarily for big-game hunting, especially during the early to mid-20th century. Here's a breakdown of its characteristics:

1. Type: The term "INERT" suggests that the cartridge is inactive or inert, meaning it has been rendered non-functional or safe for handling. This is common for cartridges used for display, training, or collection purposes.

2. Manufacturer: "Kynoch" refers to the British ammunition manufacturer, Kynoch Ltd., known for producing high-quality ammunition during the late 19th and 20th centuries. Kynoch was renowned for its cartridges, including those for hunting and military use.

3. Caliber: The "400 Nitro" designation indicates the caliber and type of cartridge. In this case, it's a .400 caliber cartridge designed for use in Nitro Express rifles.

4. Purpose: Nitro Express cartridges were developed for use in big-game hunting rifles, particularly in Africa and India during the colonial era. The 400 Nitro cartridge would typically be used for hunting large and dangerous game such as elephants, buffalo, or rhinoceros.

5. Power: Nitro Express cartridges are known for their considerable power and stopping ability, crucial for quickly incapacitating large and potentially dangerous animals. The 400 Nitro cartridge would deliver significant energy upon impact, ensuring the hunter's safety and effectiveness in the field.

Overall, the INERT Kynoch 400 Nitro cartridge represents a piece of historical ammunition with a rich legacy in big-game hunting and colonial-era safaris. It embodies the craftsmanship and power associated with classic hunting cartridges of the early to mid-20th century