20 mm cartridge

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", is conventionally taken to be the 20 mm round, the smallest caliber of autocannon. All 20 mm cartridges have an outside projectile (bullet) diameter and barrel bore diameter of approximately 0.787 inches (20.0 mm). These projectiles are typically 75 to 127 mm (3–5 in) long, cartridge cases are typically 75 to 152 mm (3–6 in) long, and most are shells, with an explosive payload and detonating fuze.

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Wikidata
2 cm caliber; 2 cm cartridge
cartridge family, cartridge, 
20 × 42mmB, 20 × 82mm, 20×102 mm, 7.5 mm cartridge, 93 mm cartridge, blunderbuss, Breda M37, Browning BLR, cartridge, Franchi SPAS-15, Furrer submachine gun, Hwacha, Mark 149, Marlin Model 336, musket, Smålänning, Springfield Model 1892-99, 

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Location: KML, Cluster Map, Maps,

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  20 × 42mmB ⓘ
  cannon cartridge designed by Denel

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  20 × 82mm ⓘ
  cannon cartridge designed by Denel

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  20×102 mm ⓘ
  20 mm cartridge, known for its use in M61 Vulcan

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  7.5 mm cartridge ⓘ
  cartridge size

• 

  93 mm cartridge ⓘ
  cartridge size

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  Mark 149 ⓘ
  

Frameless

Type	Subtype	Date	Description	Notes	Source
class	weapon		20 × 42mmB	cannon cartridge, belted magnum, 20 mm cartridge	Wikidata
class	weapon		20 × 82mm	20 mm cartridge, cannon cartridge	Wikidata
class	weapon		20×102 mm	cartridge, cannon cartridge, 20 mm cartridge	Wikidata
class	weapon		7.5 mm cartridge	20 mm cartridge, cartridge	Wikidata
class	weapon		93 mm cartridge	20 mm cartridge	Wikidata
class	weapon		Mark 149	20 mm cartridge	Wikidata