Question: Which of the handgun with which .400 Cor-Bon was designed to mimic was designed by John Browning in 1905?
Context: The Browning Hi Power is a single-action, semi-automatic handgun available in 9mm and .40 S&W calibers.  It is based on a design by American firearms inventor John Browning, and completed by Dieudonné Saive at "Fabrique Nationale" (FN) of Herstal, Belgium.  Browning died in 1926, several years before the design was finalized.  The Hi-Power is one of the most widely used military pistols in history, having been used by the armed forces of over 50 countries. The .400 Corbon is an automatic pistol cartridge developed by Cor-Bon in 1997.  It was created to mimic the ballistics of the 10 mm Auto cartridge in a .45 ACP form factor. The .440 Cor-Bon is a large-caliber handgun cartridge.  The Cor-Bon company produced the caliber bullet in 1998. The One-Pro 45 (stylized as onepro.45 or one PRO.45) is a semi-automatic pistol chambered in .45 ACP (with some variants in .400 Cor-Bon) and manufactured in Wettingen, (previously Solothurn) Switzerland.  It was at one time imported into the USA by Magnum Research and into Italy by ALGIMEC. Vis (Polish designation "pistolet wz.  35 Vis", German designation "9 mm Pistole 35(p)", or simply the Radom in English sources) is a 9×19mm caliber, single-action, semi-automatic pistol.  Inspired by American firearms inventor John Browning's 9mm "Browning GP" pistol design which was completed after Browning's death by designers at Fabrique Nationale in Herstal Belgium, this Polish gun began production at the Fabryka Broni (Arms Factory) in Radom in 1935, and was adopted as the standard handgun of the Polish Army the following year.  The pistol was valued by the Germans, and towards the end of the war issued to the German paratroopers.  As a pistol largely based on the Colt 1911 and using 9 mm rounds, it is highly prized among collectors of firearms. The .45 ACP (Automatic Colt Pistol), or .45 Auto (11.43×23mm) is a handgun cartridge designed by John Browning in 1905, for use in his prototype Colt semi-automatic pistol.  After successful military trials it was adopted, along with the Browning .45 Colt handgun, as the .45 M1911 cartridge.  The handgun was designated M1911 pistol. The FN Model 1903 (M1903, FN Mle 1903), or Browning No.2 was a self-loading semi-automatic pistol engineered by John Browning and made by Belgian arms manufacturer Fabrique Nationale (FN).  It was introduced in 1903 and fired the 9×20mmSR Browning Long cartridge.  It should not be confused with the US-made Colt Model 1903 Pocket Hammerless (in .32 ACP), nor with the Colt Model 1903 Pocket Hammer (in .38 ACP).  The FN Model 1903 is based on the same mechanical design as the Colt Model 1903 Pocket Hammerless, which Browning sold to both companies (and others as well), but enlarged to handle the more powerful 9mm Browning Long cartridge.  Due to its reliability, accuracy, light weight, and quick reloading, the M1903 was an issued sidearm for many police forces and militaries.  The pistol was initially introduced by FN as the Browning Modèle de Guerre (Browning War Model) or Browning Grand Modèle (Browning Large Model). The FN Browning M1900 is a single action, semi-automatic pistol designed c. 1896 by John Browning for Fabrique Nationale de Herstal (FN) and produced in Belgium at the turn of the century.  It was the first production handgun to use a slide. Gaztañaga Destroyer was an automatic pistol designed by Isidro Gaztañaga in Eibar, Basque country, in 1913, using 6.35 mm caliber.  It was produced in Gaztañaga y Companía, Eibar, Basque Country, and is notable for being a common Spanish handgun with the Eibar Type safety located above the grip.  It was followed in production by a 7.65 mm version which was produced for the French army during World War I.  The standard magazine contained nine rounds, but in production models used only six or seven.  The weapon is a copy of John Browning's 1906 pistols. The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning.  Its design is similar to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge.  The M2 uses the much larger and much more powerful .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for "Browning Machine Gun").  It has been referred to as "Ma Deuce", in reference to its M2 nomenclature.  The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal.  .50, M2, HB, Flexible.  It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft.  The M2 has been produced longer than any other machine gun.
Answer: .45 ACP