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The .22-250 Remington / 5.7x48mm is a very high-velocity, short action, .22 caliber rifle cartridge primarily used for varmint hunting and small game hunting. It is capable of reaching over 4,000 feet per second. Some jurisdictions prohibit the use of cartridges smaller than 6 mm (e.g., .243 Winchester) for deer hunting.
A black powder substitute is a replacement for black powder (gunpowder), primarily used in muzzleloading firearms. Substitutes may have slightly different properties from gunpowder such as: reduced sensitivity as an explosive, increased efficiency as a propellant powder, different density, and/or reduced ignition efficiency.
used to load the 173-grain (11.2 g) .30-06 Springfield M1 bullet; sold as military surplus by DCM [15] 1204 1925 1935 thin & short replaced by 4227 [15] 3031 1934 standard replaced 17 1/2; [18] for mid-range loads and medium sporting and military cartridges like the .257 Roberts, .30-30 and .348 Winchester [11] 4064 1935 standard
He went on to write "With the 90 grain load, the 244 is a good deer cartridge and certainly effective on antelope and any lighter game." [9] Ultimately 90 grain hunting bullets such as the soft pointed Spitzer used by Remington are known to be well suited to medium-sized big game and the 722 to be an inherently accurate rifle.
It was first offered for sale in 1963 in two barrel lengths: a 24-inch standard weight and 26-inch heavy weight. The price then was $295, same as the Mark V. Compared with the Mark V it weighs 40% less with most parts being reduced in size by 20%. The trigger assemblies are identical.
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It is currently the fastest production .22 caliber round in the world with muzzle velocities as high as 4,600 feet per second (1,402 meters per second). However, the .220 Swift still holds the record as the fastest .22 caliber centerfire cartridge with a published velocity of 4,665 ft/s (1,422 m/s) using a 29-grain (1.9 g) projectile and 42 ...
Ackley's loads only managed 4,600 ft/s (1,400 m/s)(Mach 4.2), firing a 50-grain (3.2 g) bullet. Based on a .378 Weatherby Magnum case, the case is impractically over-capacity for the bore diameter, and so the cartridge remains a curiosity. The advent of new slower-burning smokeless powders may have changed the equation. [8]