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Bolt action: A type of firearm action in which the firearm's bolt is operated manually by the opening and closing of the breech with a small handle. As the handle is operated, the bolt is unlocked, the breech is opened, the spent shell casing is withdrawn and ejected, the firing pin is cocked, and a new round/shell (if available) is placed into ...
Break-action shotguns, double rifles, and combination guns typically have an extractor that pushes out the casings when the action is flexed open. Most modern extractors are forceful enough to completely eject the casing from the gun (i.e. integrating the function of an ejector), but some require the user to manually remove spent cartridges.
270 Winchester necked down to a .243 bullet with the angle increased to 35 degrees - The 270 Winchester is a standardized cartridge of the same design as the 30-06 except the case is 1.2mm longer and necked down to the .270 caliber. Therefore, the 243 Catbird is a 6mm-06 with a 35 degree shoulder and a 1.2mm longer case. [10]
Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. A Remington Model 870 shotgun ... XP-100 (bolt-action) Notes
Most controlled feed mechanisms use a fixed mechanical ejector attached to the receiver, which results in the bolt having to be pulled all or almost all the way back to eject the spent casing. This can give a marginally quicker cyclic rate with a push feed action, since the bolt no longer has to be repeated as far or all the way back. [10]
The .17 Remington is based on the .223 Remington case necked down to .172 in (4.37 mm), with the shoulder moved back. [5] [6]Extremely high initial velocity (over 4,000 ft/s 1,200 m/s), flat trajectory and very low recoil are the .17 Remington's primary attributes.
In manually operated firearms, such as bolt-action, lever-action, and pump-action rifles or shotguns, the bolt is held fixed by its locking lugs during firing, forcing all the expanding gas forward. It is manually unlocked and moved to extract the spent casing and chamber another round.
Starting with a .450 Bushmaster case, Remington trimmed the length to 1.525 in from the original 1.7 and necked it down to accept a conical .308 in diameter bullet with a 25-degree shoulder. [ 4 ] The rim size is .492 in and because the round generates 55,000 psi, Remington opted to use a .308 rifle bolt in a 5.56-sized rifle for increased case ...