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The CZ-550 is a bolt-action hunting rifle series manufactured by Česká Zbrojovka Uherský Brod (CZ). The CZ 5005 series is available with a medium or magnum sized action. The CZ 550 rifle resembles the Mauser 98 rifle series, though it is not an exact copy. Since the CZ 550 magnum size action can be chambered for super magnum cartridges some elephant gun wildcat cartridges where tested (see .585 Gehringer) or where specially designed (see .600 Overkill) with and for this action.
[edit] Design detailsAs a modern civilian offspring of the Karabiner 98k service rifle the CZ 550 series offers several features and factory options, that are also typical for sporterised Mauser Karabiner 98k ex-service rifles, ranging from various technical departures from the basic Mauser service rifle on to luxury wood grades. Some of the available options were originally developed and introduced by John Rigby & Co. on Rigby Mauser hunting rifles. [edit] Operating mechanismThe operating mechanism of the CZ 550 series is based on the Mauser M 98 controlled-feed bolt action system though it is not an exact copy. The original Mauser M 98 is a simple, strong, safe, and well-thought-out design that inspired other military and hunting/sporting rifle designs that became available during the 20th century. For the CZ 550 series the action system is machined out of high-grade steel. It also features a double square bridge for mounting a telescopic sight. [edit] Features The CZ 550 system consists of a receiver that serves as the systems shroud and a bolt group of which the bolt body has three locking lugs, two large main lugs at the bolt head and the bolt handle serves as a backup in case the primary locking lugs failed. The bolt handle is permanently attached to the bolt and on the CZ 550 series and is turned-down and backwards for use with optical sights. Another distinctive feature of the CZ 550 system is the controlled-feed mechanism, consisting of a large, non-rotating claw extractor that engages the cartridge case rim as soon as the round leaves the magazine and firmly holds the cartridge case until the round is ejected by the ejector, mounted inside the receiver. The CZ 550 bolt action will cycle correctly irrespective of the way the rifle is moved or positioned during the bolt cycling action or if the cartridge has been fired or not. Only if the bolt is not brought back far enough, sharply enough, in a controlled round feed bolt action the cartridge case may not be cleanly ejected and a jam may result. The bolt houses the firing pin mechanism that visually and tactilely protrudes from the rear of the bolt indicating if the action is cocked or not. A small disassembly button offers the possibility to access the firing pin and spring. The action features a large gas relief hole at the bolt body designed to protect the users head in case of a primer or cartridge rupture or detonation. When the action suffers a catastrophic failure it is designed to deflect the debris away from the operator's face. The CZ 550 group can be easily removed from the receiver simply by pushing the disassembly button, located at the left wall of the receiver, and then by rotating and pulling the bolt out. [edit] SafetyA horizontal 2-position safety is mounted on the right side just behind the bolt system. The safety locks the bolt and sear. The user interface consists of a rather compact grooved button that should ensure good operability of the safety with low mounted aiming optics. [edit] TriggerThe single set trigger on a CZ-550 operates as a single stage during normal operation. However, when it is desirable to have less trigger pull, such as for longer range or very accurate shooting, the trigger can be pushed forward, making it a set trigger. These rifles are factory set with the trigger pull set at approximately 15 N (3.4 lbf) in standard mode and approximately 7 N (1.6 lbf) in the set mode. Both settings are adjustable.[1] [edit] BarrelThe rifles have hammer forged steel barrels. [edit] Ammunition feedingFor some models the internal magazine of the CZ 550 series M 98 system consists of an integral box machined to match the cartridge for which the rifle was being chambered, with a detachable floorplate, that can hold up to 5 standard sized rifle cartridges. Other models are fed by detachable box magazines, that can hold up to 4 standard sized rifle cartridges. The detachable magazines are released by a magazine release located at the front of the trigger guard. [edit] SightsDepending on the model various open sight are mounted as standard. All CZ 550 receivers have 19 mm dove tails milled into the top of the front and rear of the receiver as factory preparation for telescopic sight mounts (bases in square bridge) or complete mounts for telescopic sights with or without a mounting rail.[2] [edit] StockThe stocks vary form model to model and can be made out of wood or polymers. [edit] VariantsThe CZ-550 rifle is available in two basic variants. These variants technically differ in the size (length and other dimensions) of the action. These variants are offered in several versions. [edit] Medium size actionSTANDARD MC LUX MEDIUM LUX AMERICAN FS BATTUE LUX VARMINT VARMINT-LAMINATED HA 550 HUNTER or ULTIMATE HUNTING RIFLE CZ 750 SNIPER [edit] Magnum size action The magnum sized action is a magnum variant of the CZ 550 intended for big-game and safari hunting. This action can be chambered for cartridges found in elephant guns. These cartridges are dimensionally larger compared to regular magnum rifle cartridges.[3] STANDARD LUX SAFARI MAGNUM AMERICAN SAFARI MAGNUM H.E.T [edit] Safari ClassicsThese rifles are based on the CZ 550 standard and magnum sized actions. CZ USA offers with this series semi custom and custom built rifles intended for big-game and safari hunting. The Express Rifle uses the standard size CZ 550 action and the Magnum Express Rifle uses the CZ 550 Magnum action. For the standard length action the standard chambering palette is .270 Winchester, .30-06 Springfield, .300 Winchester Magnum, .338 Winchester Magnum, 9.3x62mm, .375 Ruger, .416 Ruger, .416 Taylor and .425 Westley Richards. For the magnum length action the standard chambering palette is .300 Holland & Holland, .338 Lapua Magnum, .375 Holland & Holland, .404 Jeffery, .416 Remington Magnum, .450 Rigby, .500 Jeffery and .505 Gibbs. The rifles chambered in .505 Gibbs and .500 Jeffery include a mercury recoil reducer installed in the stock. Since these rifles offer a lot of options and can built to individual customer specifications the weights and overall and barrel lengths vary. The range of possible chamberings is wider than for other CZ 550 rifles and not limited to the above mentioned standard chambering palette. [edit] See also[edit] References[edit] External links | |||||||||||||||||||||||||||||||
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