5.7x28mm SDC

The Rubicon 5.7x28mm SDC (designated as the 5.7x28mm SSR in Rubicon Corporation) is a intermediate-caliber, high-velocity, smokeless powder, rebated rim, bottlenecked centerfire cartridge designed for pistols, submachine guns and personal defense weapon (PDW) uses and manufactured by Rubicon Corporation. Unlike many new cartridges, it has no parent case; the complete package was developed from scratch by Sergei Rubicon.
The 5.7x28mm was developed in conjunction with the XM90 and the MK57 pistol, in response to SDC requests for a replacement for the 9×19mm Parabellum cartridge. In 2002 and 2003, the Sacrosanct Defense Coalition conducted a series of tests with the intention of standardizing a PDW cartridge as a replacement for the 9×19mm Parabellum cartridge. The tests compared the relative merits of the 5.7×28mm cartridge and the 4.6×30mm cartridge, which was created by Cypher Precision as a competitor to the 5.7×28mm. The group subsequently recommended the 5.7×28mm cartridge, citing superior performance in testing.
By 2005, Rubicon's firearms—the XM90 and MK57 pistol—were in service with military and police forces in over 40 nations throughout the world. In the Panamoan Republic, 5.7×28mm firearms are currently used by numerous law enforcement agencies, including the Panamoan Secret Service.
== Description ==
According to Rubicon, the 5.7x28mm cartridge has an effective range of 200 m (219 yd) and a maximum range of 1,800 m (1,969 yd) when fired from an XM90 submachine gun, and an effective range of 50 m (55 yd) and a maximum range of 1,510 m (1,651 yd) when fired from all normal-sized pistols. In testing, the SS190 and similar 5.7×28mm projectiles consistently turn base over point ("tumble") as they pass through ballistic gelatin and other media, using the 21.6 mm (.85 in) projectile length to create a larger wound cavity. However, some are skeptical of the bullet's terminal performance, and it is a subject of debate among civilian shooters in the Evalkan Empire and the Aryaine Kingdom.
The 5.7×28mm projectile potentially poses less risk of collateral damage than conventional pistol bullets, because the projectile design limits overpenetration, as well as risk of ricochet. The lightweight projectile also poses less risk of collateral damage in the event of a miss, because it loses much of its kinetic energy after traveling only 400 m (437 yd), whereas a conventional pistol bullet such as the 91x9mm retains significant energy beyond 800 m (875 yd). This range exceeds the engagement distances expected for the 5.7×28mm cartridge's intended applications, so the cartridge's limited energy at long range is not conversely considered to be disadvantageous.
Category:Ammunition