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{{more citations needed|date=April 2018}}
[[File:SSA 7.62mm 143gr AP.png|thumb|300px|SSA 7.62mm 143gr AP rifle cartridge, bullet]]
 
The '''7.62&nbsp;mm caliber''' is a nominal [[caliber]] used for a number of different [[cartridge (weaponry)|cartridges]]. Historically, this class of cartridge was commonly known as '''.30 caliber''', the equivalent in [[imperial unit|Imperial]] and [[United States customary unit|United States Customary]] measures. It is most commonly used in full-power military main [[battle rifle]] (MBR)hunting cartridges. The measurement equals 0.30 inches or three [[Line (unit)|decimal lines]], written '''''.3″''''' and read as '''''three-line'''''.<ref>Holt Bodinson: [https://www.thefreelibrary.com/The+old+Three-Line%3A+still+a+great+value.-a0151841457 The old Three-Line: still a great value], Guns Magazine, Nov, 2006</ref>
 
The 7.62&nbsp;mm designation refers to the internal diameter of the barrel at the lands (the raised helical ridges in rifled gun barrels). The actual bullet caliber is often {{convert|7.82|mm|abbr=on}}, although Soviet weapons commonly use a {{convert|7.91|mm|abbr=on}} bullet, as do older British ([[.303 British]]) and Japanese ([[7.7×58mm Arisaka]]) cartridges.
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* [[7.65×25mm Borchardt]], from which both the Mauser and Parabellum cartridges were developed
* [[7.65×21mm Parabellum]]
* [[.32 ACP|7.65×17mm Browning]], alsomore commonly known as [[.32 ACP]]
* [[7.62mm SP-2]], used only in the [[TKB-506]] cigarcigarette cuttercase pistol
 
==Revolver cartridges in 7.62 mm caliber==
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==Rifle cartridges in 7.62 mm caliber==
The most common and historical rifle cartridges in this caliber are:
* [[.30 Carbinecarbine]], used in the [[M1 Carbinecarbine|M1/M2/M3 carbines]], is sometimes called the 7.62×33mm.
* [[300 AAC Blackout (7.62×35mm)]], also known as 300 BLK, is designed for the [[M4 carbine]] and [[STANAG magazine]].
* Soviet [[7.62×39mm]], also known as 7.62&nbsp;mm Soviet, M43, or occasionally [[.30 Short Combloc]], is designed for the [[SKS]] and used in the [[AK-47]], [[AKM]], [[RPK]] and [[RPD machine gun|RPD]] light machine guns.
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* [[7.62×53mmR]], Finnish design based on the Russian 7.62×54mmR round.
* [[7.62×54mmR]], another Russian cartridge, it was first used in the [[Mosin–Nagant]] rifle in 1891. The modern versions of the cartridges are now in wide use in numerous world armies as sniper rifles (particularly the [[SVD (rifle)|SVD]] family) and machine guns (numerous types, many developed from AK family, such as the [[PK machine gun|PKM]]).
* [[.30-06 Springfield]], is a US military cartridge used in World War I, World War II, the KoreaKorean War, and the Vietnam War, as well as hunting game, is known as the 7.62×63mm in metric measurement.
* [[.303 British]], used in [[Lee–Metford]] and [[Lee–Enfield]] rifles, is known as 7.7×56mmR in metric measurement.
* [[7.7×58mm Arisaka]] is used in the [[Type 99 rifle|Type 99]], [[Parachutist's Rifle Type 2|Type 2]] and [[Type 4 rifle|Type 4]] rifles.
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