A "kiloyard" is not a commonly used unit of measurement, and it is not part of the International System of Units (SI). In everyday conversation and most scientific contexts, the yard is used as a unit of length in some countries, primarily the United States and the United Kingdom. One yard is equal to 3 feet or 36 inches.
The prefix "kilo-" typically denotes a factor of 1,000. So, a "kiloyard" would theoretically be 1,000 yards. However, this term is not standard in any established system of measurement and is unlikely to be encountered in practical use. If you need to express a length of 1,000 yards, it's more common to simply say "1,000 yards" or "one thousand yards" rather than using the term "kiloyard."
"Caliber" is a term used to describe the internal diameter or bore of a firearm's barrel or the diameter of the projectile (bullet) it fires. It is typically expressed in either inches or millimeters, depending on the measurement system used.
In the United States, caliber is often expressed in inches. For example, a firearm with a bore diameter of 0.30 inches would be referred to as having a ".30 caliber" bore. Similarly, a firearm with a bore diameter of 0.45 inches would be described as having a ".45 caliber" bore.
In many other countries that use the metric system, caliber is expressed in millimeters. For instance, a firearm with a bore diameter of 9 millimeters is referred to as having a "9mm caliber" bore.
Caliber is an essential specification for firearms because it determines the size of ammunition that can be used with a particular gun. The ammunition for a firearm must match its caliber to function safely and accurately. Different firearms are designed to use specific calibers of ammunition, and it's crucial for firearm owners to select and use the correct ammunition for their guns.