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In page Bolt action:

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Most of the bolt-action designs use a rotating bolt (or "turn pull") design, which involves the shooter doing an upward "rotating" movement of the handle to unlock the bolt from the breech and cock the firing pin, followed by a rearward "pull" to open the breech, extract the spent cartridge case, then reverse the whole process to chamber the next cartridge and relock the breech. There are four major turn bolt-action designs: the Remington M-700, possibly the single most numerous produced rifle in history which is now also used as basis for most custom competition rifle actions,[1][citation needed] along with the Mauser system, the Lee–Enfield system, and the Mosin–Nagant system.