The .40 Super is a powerful automatic

pistol A pistol is a handgun, more specifically one with the chamber integral to its gun barrel, though in common usage the two terms are often used interchangeably. The English word was introduced in , when early handguns were produced in Europe, a ...

cartridge developed in 1996 and introduced to the market by Triton Cartridge. The cartridge was co-developed by Fernando Coelho and Tom Burczynski. It never attained mainstream success, Triton Cartridge folded, and supplies and support is now very limited.

History and design

In 1994 Triton Cartridge, an ammunition company based in upstate NY, released a cartridge called the .45 Super. Essentially, the .45 Super is based on a .451 Detonics case trimmed to .45 ACP length. Pioneered by writers Dean Grennell and the late Tom Ferguson, the .45 Super raised the performance level for .45 ACP-chambered autos beyond that of the .45 ACP+P and even the

10mm Auto The 10mm Auto (10×25mm, official C.I.P. nomenclature: 10 mm Auto, official SAAMI nomenclature: 10mm Automatic) is a semi-automatic pistol cartridge introduced in 1983. Its design was adopted and later produced by ammunition manufacturer ...

. With the availability of the strong .45 Super cartridge case, in January 1996 Fernando Coelho (president and founder of Triton Cartridge) and Tom Burczynski (inventor of Hydra-Shok, Starfire and Quik-Shok bullets) began work on a new, more radical cartridge. Based on a .45 Super necked down to .40 caliber, the new cartridge began to take shape. Necking a .45 ACP to .40 caliber was nothing new. Before the public debut of the .40 S&W, Charles Petty, a well-known and respected writer, had already ventured into the bottleneck arena. His cartridge, called the "10mm Centaur", was based on a .45 ACP case necked to .40 caliber using 10 mm dies. Prior to that, Dean Grennell took .451 Detonics cases and necked them down to 9 mm, calling it the ".38/45 Hard Head". Petty and Tony Rumore (Tromix) were major contributors in the initial load development for Triton’s new cartridge. During that time, Triton began closely examining the specific attributes of the cartridge (feed reliability, case strength, down-range ballistic performance, etc.). In order to maximize the performance potential and reliability of the new cartridge, it was decided to lengthen the cartridge case from .45 ACP (.898 in) to 10 mm (.992 in) length. By trimming .45 Winchester Magnum brass to 10 mm case length and necking them to .40 caliber, the .40 Super began to take final shape. Working closely with Starline Brass Company, more testing was conducted on the cartridge case. These tests led to further improvements. A small primer pocket replaced the large primer pocket. This allowed the use of small pistol magnum or small rifle primers and helped control primer flow. The final improvement came with the increased thickness of the cartridge case wall from the web area up to the beginning of the shoulder. This created a cartridge case stronger than the .45 Winchester Magnum cartridge case. The .40 Super cartridge case was designed for a balance of strength and powder capacity. To maximize bullet pull and overall feeding characteristics, the case has a neck length of .175 in. The shoulder angle is an optimum 25 degrees. The neck yields more precise bullet alignment than can be achieved using a cartridge with a shorter neck. This translates to increased accuracy. The pressure limit for factory .40 Super ammunition from Triton was 37,000 PSI, well below the strength limits of the cartridge case. The .40 Super drives a 135 grain bullet to 1,800 feet per second while generating less chamber pressure than the 9x23mm Winchester. With a 200-grain bullet, the .40 Super delivers more foot-pounds of energy at 100 yards than the .45 ACP does at the muzzle. The original plan was to market the .40 Super as the .40 SIG, the big brother to the .357 SIG. The cartridge was introduced in 1996 to Michael Bussard, the assistant to the president of SigArms, and he was interested in the cartridge for use in the P220 pistol. Safari Arms also produced a couple of barrels marked "Triton 10", presumably prior to Triton selecting the .40 Super moniker. Initial prototype .40 Super brass actually had a headstamp that read, ".45 Colt" with the second batch of prototype cases stamped "45 WinMag". Starline Brass, the manufacturer of the .40 Super cartridge case, used .45 Colt forming dies and later the 45 Win Mag dies. Ultimately the headstamp was updated to read, "Triton .40 Super" and the previous large pistol primer pocket was changed to accept small rifle and pistol primers.

Ammunition and handloading

From a reloader standpoint, there was tremendous versatility in the .40 Super. Bullet weights on the market included: 125, 135, 150, 155, 165, 170, 180, 190, 200 and 220 grains. Loads were developed with a dozen powders. Small pistol magnum or small rifle primers could be utilized. Brass was available from both Triton and Starline Brass Company. Many semi-automatic pistols can accommodate the .40 Super, especially those already chambered for the .45 ACP cartridge are the easiest to convert. This is accomplished by simply swapping out the .45 ACP barrel with the .40 Super barrel and upgrading the recoil spring system with a heavy duty spring. Existing .45 ACP magazines are utilized with no modifications. Handguns converted to .40 Super include the S&W 4506, Glock 21, Glock 30, SIG P220, FNH FNP-45, FNH FNX-45, HK USP, Tanfoglio Witness and the 1911 Government Model (and its variants). Handguns set up for the .45 Super cartridge only need a barrel swap. Handguns chambered for the .400 Cor-Bon can have their barrels rechambered to .40 Super. Factory-chambered 1911 handguns were introduced by STI. Barrel reamers were produced by Clymer Mfg. Barrels and conversions were available from Bar-Sto Barrels, Jarvis, Inc., Storm Lake Machine, Cylinder & Slide, Al’s Custom, Inc., Morris Custom, LaRocca Gunworks, and EFK Fire Dragon. Reloading dies are available from RCBS and Redding.

Current status

The .40 Super cartridge lost momentum when Triton Cartridge was sold and later closed. Double Tap Ammo and Underwood Ammo still offer loaded ammunition for the .40 Super. Today brass is still available from Starline Brass Company and DoubleTap. 1911 conversion kits or barrels are no longer available as of 2013, the last known source was Bar-Sto Precision Machine. Lone Wolf Distributors and RockYourGlock still offer the conversion barrel for a Glock 21 and you must use a Glock 21 10-round single-stack magazine in order for the ammo to feed correctly, a double-stack 13-round magazine will not feed reliably.

Related rounds

* .45 Super *

.45 Winchester Magnum The .45 Winchester Magnum is a .45 caliber rimless cartridge intended for use in semi-automatic pistols. The cartridge is externally a lengthened .45 ACP with a thicker web to withstand higher operating pressures. The 45 Win Mag is nearly iden ...

.45 ACP The .45 ACP ( Automatic Colt Pistol) or .45 Auto (11.43×23mm) is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol. After successful military trials, it ...

.400 Corbon 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. It is essentially a .45 ACP case, necked down to .40 caliber with a 2 ...

.357 SIG The .357 SIG (designated as the 357 Sig by the SAAMI and 357 SIG by the C.I.P. or 9×22mm in unofficial metric notation) is a bottlenecked rimless centerfire handgun cartridge developed by the Swiss- German firearms manufacturer SIG Sauer, ...

* .38/.45 Clerke * .38 Casull

References

External links