Barnes Vor-Tx 5.56x45mm NATO 70Grain 20 rounds

(1 customer review)


  • UPC:  130825164005
  • Brand: BARNES
  • Caliber: 5.56x45mm
  • Bullet Weight: 70 grain
  • Number of Rounds: 20 rounds
  • Unit of Measure: Box
  • Classification: Ammunition


BUY Barnes Vor-Tx 5.56x45mm NATO 70Grain


The Barnes Vor-Tx 5.56x45mm NATO 70Grain cartridge inspired an international tendency toward relatively small-sized, lightweight, high-velocity military service cartridges that allow a soldier to carry more ammunition for the same weight compared to their larger and heavier predecessor cartridges, have favourable maximum point-blank range or “battle zero” characteristics, and produce relatively low bolt thrust and free recoil impulse, favouring lightweight arms design and automatic fire accuracy.[10][15][16] Similar intermediate cartridges were developed and adopted by the Soviet Union  (5.45×39mm)  and by the People’s Republic of China in 1987 (5.8×42mm).

The development of the cartridge that eventually became the .223 Remington (from which 5.56mm NATO would eventually be developed) would be intrinsically linked to the development of a new lightweight combat rifle. The cartridge and rifle were developed as one unit by Fairchild Industries, Remington Arms, and several engineers working toward a goal developed by U.S. Continental Army Command (CONARC). Early development work began in 1957. A project to create a small-calibre, high-velocity (SCHV) firearm was created. Eugene Stoner of Armalite was invited to scale down the AR-10 (7.62mm) design. Winchester was also invited to participate.

Due to several different .222 caliber cartridges being developed for the SCHV project, the 222 Special was renamed .223 Remington in 1959. In May of that year, a report was produced stating that five- to seven-man squads armed with AR-15 rifles had higher hit probabilities than 11-man squads armed with M-14 rifles. At a 4th of July picnic, Air Force General Curtis LeMay fired an AR-15 and was very impressed with it. He ordered a number of them to replace M2 carbines that were in use by the Air Force. By November, testing at Aberdeen Proving Ground showed that the AR-15 failure rate had declined to 2.5 failures per 1,000 rounds, resulting in the M-16 being approved for Air Force Trials. Marksmanship testing in 1961 comparing the M-16 to the M-14 indicated 43% of M-16 shooters achieved “expert” while only 22% of M-14 shooters did. General LeMay subsequently ordered 80,000 rifles.

In the spring of 1962, Remington submitted the specifications of the .223 Remington to the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI). In July 1962, operational testing ended with a recommendation for adoption of the M-16 rifle chambered in 5.56 x 45mm. In September 1963, the .223 Remington cartridge was officially accepted and named “Cartridge, 5.56mm ball, M193.” The specification includes a Remington-designed bullet and the use of IMR4475 powder which resulted in a muzzle velocity of 3,250 ft/s (991 m/s) and a chamber pressure of 52,000 psi. NATO members signed an agreement to select a second, smaller caliber cartridge to replace the 7.62×51mm NATO cartridge.[12] Of the cartridges tendered, the .223 Remington (M193) was the basis for a new design created by FN Herstal. The FN-created cartridge was named “5.56×45mm NATO” with a military designation of SS109 in NATO and M855 in the U.S.[13] These new SS109 ball cartridges required a 228 mm (1-in-9 inch) twist rate while adequately stabilizing the longer L110 tracer projectile required an even faster, 178 mm (1-in-7 inch), twist rate.




  • Brand: BARNES
  • Caliber: 5.56x45mm
  • Bullet Weight: 70 grain
  • Bullet Type: TSX Boat Tail
  • Cartridge Material: Brass
  • Number of Rounds: 20 rounds
  • Package Type: Box

1 review for Barnes Vor-Tx 5.56x45mm NATO 70Grain 20 rounds

  1. Barrett

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