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The .225 Winchester was chambered in factory rifles by Winchester (Models 70 and 670) and Savage (Model 340). All commercially produced rifles chambered in .225 Winchester were turn-bolt or break actions.
Rifling of a 105 mm Royal Ordnance L7 tank gun Conventional rifling of a 90 mm M75 cannon (production year 1891, Austria-Hungary) Rifling in a GAU-8 autocannon. Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy.
The SR-3 Vikhr (СР-3 Вихрь, Russian for "whirlwind") is a Russian 9×39mm compact assault rifle.It was developed by A. D. Borisov, V. N. Levchenko and A. Tyshlykov at TsNIITochMash (Central Institute for Precision Machine Building) in the early 1990s and was manufactured in 1994.
The second reference drag curve is adjusted to equal the Siacci/Mayevski retardation rate function at a projectile velocity of 2600 fps (792.5 m/s) using a .30-06 Springfield Cartridge, Ball, Caliber .30 M2 152 grains (9.8 g) rifle spitzer bullet with a slope or deceleration constant factor of 0.5 in the supersonic flight regime. In other ...
A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves ("rifling") cut into the barrel walls.The raised areas of the rifling are called "lands," which make contact with the projectile (for small arms usage, called a bullet), imparting spin around an axis corresponding to the orientation of the weapon.
Firearm muzzle velocities range from approximately 120 m/s (390 ft/s) to 370 m/s (1,200 ft/s) in black powder muskets, [3] to more than 1,200 m/s (3,900 ft/s) [4] in modern rifles with high-velocity cartridges such as the .220 Swift and .204 Ruger, all the way to 1,700 m/s (5,600 ft/s) [5] for tank guns firing kinetic energy penetrator ammunition.
M16 type rifles are currently made in 5.56×45mm NATO, 6.8×43mm SPC and .300 AAC Blackout caliber. [309] AK-47 type rifles are currently made in 7.62×39mm, 5.45×39mm and 5.56×45mm NATO. [204] The 7.62mm NATO SR-25 and M110 are based on the original AR-10, but feature additional refinements to maximize parts commonality with the M16. [310]
The ability to compare ammunition is a direct result of the invention of rifling around the turn of the 16th century. [6] By forcing the bullet to spin as it travels down the barrel of the weapon the precision is greatly increased. At the same time, the rifling leaves marks on the bullet that are indicative of that particular barrel.