Until the middle of the last century, all cartridges with a bullet diameter of less than 7mm were referred to as small caliber. Nowadays, this designation is primarily used for .22 caliber cartridges (5.6mm bullet diameter).
To the overview of the common calibers
More exciting reports on the subject of caliber
You can also find exciting, interesting and informative reports on the topic at our premium partner, the hunting magazine hunting time. for example in the overview of all articles on the subject of caliber.