Barnes Precision Match 5.56x45mm NATO 69gr OTM Ammunition /20

Barnes Precision Match 5.56x45mm NATO 69gr OTM /20

Precision Match, engineered for precision at extreme distances, features exceptionally low standard deviations and extreme variations due to Barnes’ exacting manufacturing and quality standards. Precision Match rounds are loaded with a match grade OTM (Open Tip Match) BT projectile featuring a long boat tail and high B.C. As an additional bonus, scan the QR code located on the back of each box to view Doppler radar generated drop tables specific to each load.

Specifications
-Caliber: 5.56x45mm NATO
-Bullet: 69gr OTM
-Rounds Per Box: 20
-Reloadable: Yes

About the Manufacturer
In 1932, Fred Barnes began selling bullets made in his Bayfield, Colorado basement workshop. Over the next 40 years, the company gained a solid reputation by offering premium bullets to hunters who “rolled their own.” The Barnes Original became known as the top choice for African game. Randy & Coni Brooks infused young blood and new life into the company when they purchased Barnes in 1974. Product performance, innovation and passion forged their dreams for the business into reality.

About the 5.56x45m NATO
In 1953, the 7.62×51mm NATO rifle cartridge was selected as the first standard NATO rifle cartridge. At the time of selection, there had been criticism that the 7.62×51mm NATO was too powerful for lightweight modern service rifles, causing excessive recoil, and that as a result it did not allow for sufficient automatic rate of fire from hand-held weapons in modern combat. The British had extensive evidence with their own experimentation with intermediate cartridges since 1945 and were on the point of adopting a .280 inch (7 mm) cartridge when the selection of the 7.62×51mm NATO was made. The FN company had also been involved in the development of the .280 round, including developing a version of the FN FAL in .280. The concerns about recoil and effectiveness were effectively overruled by the US within NATO, and the other NATO nations accepted that standardization was more important at the time than selection of the ideal cartridge.

Specifications
Parent case .223 Remington (M193)
Case type Rimless tapered, bottleneck
Bullet diameter 5.70 mm (0.224 in)
Neck diameter 6.43 mm (0.253 in)
Shoulder diameter 9.00 mm (0.354 in)
Base diameter 9.58 mm (0.377 in)
Rim diameter 9.60 mm (0.378 in)
Rim thickness 1.14 mm (0.045 in)
Case length 44.70 mm (1.760 in)
Overall length 57.40 mm (2.260 in)
Case capacity 1.85 cm3 (28.5 gr H2O)
Rifling twist 178 mm or 229 mm (1 in 7 in)
Primer type Small rifle
Maximum pressure (EPVAT) 430.00 MPa (62,366 psi)
Maximum pressure (SCATP 5.56) 380.00 MPa (55,114 psi)

Ballistic performance
Bullet mass/type Velocity Energy
3.56 g (55 gr) XM193 FMJBT 993 m/s (3,260 ft/s) 1,758 J (1,297 ft·lbf)
4 g (62 gr) SS109 FMJBT 945 m/s (3,100 ft/s) 1,767 J (1,303 ft·lbf)
4.1 g (63 gr) DM11 FMJBT 936 m/s (3,070 ft/s) 1,796 J (1,325 ft·lbf)
4.1 g (63 gr) GP 90 FMJBT 905 m/s (2,970 ft/s) 1,679 J (1,238 ft·lbf)
4 g (62 gr) M855A1 FMJBT 945 m/s (3,100 ft/s) 1,843 J (1,359 ft·lbf)