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The AR-15/M16 can easily be converted to the 6×45mm with a simple barrel swap with few or no further modifications to the rifle. This is also true for rifles such as Ruger's Mini-14 and most bolt-action rifles chambered for the .223 Remington cartridge. [ 1 ]
The 6×45mm SAW describes an experimental series of rimless bottlenecked intermediate cartridges developed in the 1970s for the U.S. Army.The cartridges were produced in a variety of sizes and from a variety of materials.
The rimless cartridge has a base diameter of 11.82 mm (similar to the 7.62×51mm NATO) and a case length of 47.72 mm. [2]. The bullet is an unusual 6.65 mm diameter (6.45mm refers to the bore diameter), fractionally smaller than the common 6.5 mm (bore diameter) bullet.
PK barrels have a folding carry handle/grip that is positioned to the left of the receiver and is used to transport the weapon and quickly and safely change-out barrels to prevent barrel overheating. The bore is chrome-lined and features four right-hand grooves at a 240 mm (1 in 9.45 in) rifling twist rate.
Reduced barrel wear [5] compared to 6mm Norma BR; The 6.5×47mm Lapua has a base diameter and overall length similar to the 7.62×51mm NATO/.308 Winchester, allowing it to accept the same bolt heads and fit into similar short actions and magazines. A small rifle primer that is easier to seat and allows for higher case pressure than a large ...
Test barrel length: 24 inch Source(s): Federal Cartridge [ 1 ] / Accurate Powder [ 2 ] .30-06 Springfield wildcat cartridges are cartridges developed from a 30-06 Springfield "parent cartridge" through narrowing or widening the cartridge neck to fit a smaller or larger bullet in an attempt to improve performance in specific areas. [ 3 ]
To make the 6.5×68mm an awesome long-range cartridge, rifle barrels with a 200 mm to 230 mm (1 in 7.9 to 9 inch) twist rate are a better choice. Due to the large case capacity in relation to the 6.5 mm (.264 inch) caliber bore size the 6.5×68mm is very harsh on barrels. The 6.5×68mm typically wears out a rifle barrel in 500 to 1000 rounds.
The resulting legislation raised the minimum age for buying a firearm or airgun from 14 to 17, extended controls to shotguns and other smooth-bore weapons with barrels shorter than 20 in (510 mm) (later raised by the Firearms Act 1968 to 24 in (610 mm)), transferred certificates for machine guns to military oversight, regulated gun dealers, and ...