23 mm caliber is a specific size of popular
autocannon
An autocannon, automatic cannon or machine cannon is a automatic firearm, fully automatic gun that is capable of rapid-firing large-caliber ( or more) armour-piercing, explosive or incendiary ammunition, incendiary shell (projectile), shells, ...
ammunition.
This ammunition size has been widely used in many conflicts worldwide. Examples of armaments using it are:
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23×115mm
The 23×115mm round is used in Soviet (USSR)/Russian/ CIS aircraft autocannon. Although superseded by the 30×165mm round the Russian Air Force still uses it in the GSh-23L (in the aircraft's tail turrets and in the UPK-23-250 gun pod) and th ...
caliber, used on many Soviet and Russian airplanes
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23×122mm
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23×139mmSR
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23×152mmB caliber, used on Ilyushin Il-2 attack plane as well as on later Soviet anti-aircraft guns
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23×260mm caliber,
telescoped ammunition used on the
Rikhter R-23
The Rikhter R-23 is an aircraft autocannon developed for the Soviet Air Force starting in the late 1950s. It was designed to be as short as possible to avoid problems found on high-speed aircraft when the guns were pointed into the airstream. The ...
autocannon
An autocannon, automatic cannon or machine cannon is a automatic firearm, fully automatic gun that is capable of rapid-firing large-caliber ( or more) armour-piercing, explosive or incendiary ammunition, incendiary shell (projectile), shells, ...
[https://disk.yandex.com/a/03L473AK3VQkLK/5aeeab7966c8a637d96aa450]
Cartridges
(incomplete list)
See also
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12.7×99mm
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12.7×108mm
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14.5x114
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20 mm caliber
20 mm caliber is a specific size of popular autocannon ammunition. The dividing line between smaller-caliber weapons, commonly called "guns", from larger-caliber "cannons" (e.g. machine gun vs. autocannon), is conventionally taken to be the 20 m ...
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25×137mm
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40 mm grenade
This is a general collection of the world's many types of ammunition for grenade launchers in caliber.
Several countries have developed or adopted grenade launchers in 40 mm caliber.
NATO
NATO currently uses three standardized 40 mm grenad ...
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Bofors 40 mm gun
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List of cartridges (weaponry), pistol and rifle
A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purposes. A list may be memorialized in any number of ways, including existing only in the mind of the list-maker, but ...
References
{{Firearm cartridge calibers