What is common to all blowback systems is that the cartridge case must move under the direct action of the powder pressure, therefore any gun in which the bolt is not rigidly locked, and permitted to move while there remains gas pressure in the chamber, will undergo a degree of blowback action. Some guns use energy from blowback to perform the automatic bolt cycling /reloading process, while others will use a portion of the blowback to operate only certain parts of the cycle or simply use the blowback energy to enhance the operational energy from another system of automatic operation. This 'blowback' is the predominant component of the recoil. The expanding gas also creates a jet propulsion effect rearward in the barrel against the spent cartridge case. bullet) is still within the gun barrel, the high-pressure propellant gas behind it is contained within what could be seen as a closed system but at the moment it exits the muzzle, this functional seal is broken, allowing the propellant gas to be suddenly released in an explosive muzzle blast. In firearms, a blowback system is generally defined as an operating system in which energy to operate the firearm's various mechanisms, and automate the loading of another cartridge, is derived from the inertia of the spent cartridge case being pushed out the rear of the chamber by rapidly expanding gases produced by a burning propellant, typically gunpowder. Other operating principles for self-loading firearms include delayed blowback, blow forward, gas operation, and recoil operation. The blowback principle may be considered a simplified form of gas operation, since the cartridge case behaves like a piston driven by the powder gases. A few locked breech designs use a form of blowback (example: primer actuation) to perform the unlocking function. In most actions that use blowback operation, the breech is not locked mechanically at the time of firing: the inertia of the bolt and recoil spring(s), relative to the weight of the bullet, delay opening of the breech until the bullet has left the barrel. Several blowback systems exist within this broad principle of operation, each distinguished by the methods used to control bolt movement.

Send us feedback about these examples.Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gas created by the ignition of the propellant charge. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'revolve.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2023 Outside government channels, that could mean working Richardson's contacts: a revolving cast of former diplomats, intelligence and law enforcement officials. 2023 The problem persists years later, and the school doors start to become revolving ones as employees search for livable wages during a time of high inflation. 2023 Then, the revolving hours and minutes were positioned on aluminum cylinders visible on the case band as another nod to the lateral displays seen on many MB&F Machines. Chris Bumbaca, USA TODAY, 16 June 2023 Since the mid-90s, this country has been governed by revolving continuous resolution and omnibus spending bill. 2023 And any championship aspirations revolve mostly around the success of the offense.

2023 With up to 146,000 workers threatening to strike as soon as Friday if contract agreements can’t be reached, late-stage negotiations have revolved heavily around compensation and benefits. 2023 Though the former President is in and out of the fair quickly, his status as the dominant force in the primary, the hub around which all things revolve, is affirmed.

Recent Examples on the Web The case revolves mostly around the state's RICO statute, the Racketeer Influenced and Corrupt Organizations Act, which penalizes activities of individuals engaging in organized crime.

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