Highest Caliber Bullet - This article contains nested words: vague sentences that are often accompanied by biased or unverified information. These statements should be clarified or removed. (October 2019)
The .220 Swift (5.56×56mmSR) is a semi-rimmed rifle cartridge developed by Winchester and introduced in 1935 for small game and vermin hunting. It was the first factory-loaded rifle cartridge with a muzzle velocity of 1,200 m/s (4,000 ft/s).
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Cartridge velocities range from 2,000 km/h (1,200 mph; 560 m/s; 1,800 ft/s) to about 4,500 km/h (2,800 mph; 1,200 m/s); 4, 100 ft/s). The Swift is a large caliber .224 cartridge and bullet designed for small game such as prairie dogs, groundhogs, groundhogs and other insects (or "varmints" in the US). What it introduced was 1,400 ft/s (430 m/s) faster than its closest worm-hunting competitor, the .22 Hornet (also .224 caliber).
Bullet Grain & Bullet Weight
The .220 Swift remains the world's fastest commercial cartridge, using a 1.9 gram (29 gr) bullet and 2.7 gram (42 gr) 3031 powder with a published velocity of 1,422 m/s ( 4,665 ft/s).
Its very high velocity allows for bullet drop to be accurately observed up to 375 yd (343 m) and is considered an excellent bug-catching cartridge by experienced fast shooters.
The original Winchester factory load provided a 48-grain (3.1 g) bullet propelled at 1,200 meters per second (4,100 ft/s). Handloaders can improve this slightly, but only at max load. The Swift can be loaded with light bullets to reach 1,300 m/s (4,400 ft/s).
Correctly timed .224" 75 grain (4.9 g) bullets were developed for use in high velocity .22 caliber rifles for big game and long range shooting. Heavier bullets perform better in rifles which have the appropriate rifle twist rate for the projectile diameter. , lgth and other physical properties. Consider the properties.
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A prototype of the .220 Swift was developed in 1934-35 by Grosver Watkins that surpassed the .250-3000 Savage as a means of achieving much higher velocities. However, the final commercial version developed by Winchester was based on the neck of the 6mm Lee Navy cartridge down, but in addition to achieving the space between the head of the piece at its rim, a feature already considered obsolete in the 1930s, it was widened to accommodate a flared edge that complicated loading. 12mm wide .30-06 with bolt face. The .220 Swift was developed by Winchester and introduced in 1935 as a new caliber for its Model 54 bolt-action rifle. When the Winchester Model 70 was first released in 1936, the .220 Swift was one of the standard calibers offered and was discontinued in 1964.
The Swift has the dubious distinction of being the most controversial of the many .224 caliber cartridges,
And has inspired praise and criticism in equal measure. Traditionalists denounce it as an over-the-top "barrel burner" that can destroy a chromoly barrel in 200-300 rounds, especially if fired in long bursts from an increasingly hot barrel.
Its proponents argue that poor barrel steels and failure to remove copper spatter after firing are to blame, and point to instances of rifles with stainless steel barrels superior to the Swift, which maintained a lower MOA . Accuracy after more than 4,000 shots.
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.220 Swift Max C.I.P. Cartridge size All measurements are shown in metric (mm) and imperial (inch) units.
As cartridge bore diameters exceed capacity and projectile velocities are high, throat erosion is a common problem. Modern metallurgy and cryogenic treatments have greatly improved barrel life with the .220 Swift and other 4,000 ft/s (1,200 m/s) cartridges, although guns firing these cartridges generally require re-chambering or recan much faster. -velocity cartridges like the .222 Remington and .223 Remington.
The Swift is a controversial deer caliber. Its use is banned for large deer such as red, sika and fallow in several states in the US and the Netherlands, Norway, Wales and Northern Ireland, but some states, such as Minnesota, allow larger caliber rounds small like the .220 Swift. use
In the early days of the cartridge in the 1930s, the W.D.M. Bell used the .220 Swift on large deer with great success and praised the caliber's seemingly magical killing power, which he attributed to the very high-velocity bullet impact that created massive hydrostatic shock waves in the body of the animal
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A lighter bullet, 50 or 55 grain (3.2 or 3.6 g), does not leave insufficient margin of error in bullet placement for the skill of the average deer shooter.
. However, there is little debate as to the effectiveness of Swift's Proves on smaller deer species such as roe deer, but the very fast fragmenting "varmint" type pellets are not used.
Most factory Swift rifles have fairly slow twist rates, such as 1-12 or 1-14 inches, designed to stabilize lighter bullets popular in vermin hunting. Custom Swifts can have fast twist rates such as 1-9 inches to keep heavy bullets stable, with construction suitable for big game.
P.O. Ackley stated that the .220 Swift was a good round for medium-large game and used it extensively to kill wild burros in the American West.
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Famed Alaskan wildlife control officer Frank Glaser used the Winchester Model 70 chambered in .220 Swift extensively in the 1930s and 1940s. Glaser used the caliber on all kinds of big game in Alaska, including wolf, moose, caribou, and Dall's sheep, and found that so long as the shots were kept in the lungs, the Swift produced more instant death than any other weapon he possessed. However, he found them completely unsuitable for grizzly bear hunting, and on one occasion had to shoot aggressive sows eleven times.
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