6 mm XC

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6mm XC
Type Rifle
Place of origin  United States
Production history
Designer David Tubb
Manufacturer Commercially by Norma
Parent case .250 Savage
Case type Rimless, Bottleneck
Bullet diameter 6.17 mm (0.243 in)
Neck diameter 6.82 mm (0.269 in)
Shoulder diameter 11.42 mm (0.450 in)
Base diameter 11.84 mm (0.466 in)
Rim diameter 11.86 mm (0.467 in)
Rim thickness 1.22 mm (0.048 in)
Case length 48.1 mm (1.89 in)
Overall length 63.4 mm (2.50 in)
Case capacity 3.24 cm3 (50.0 gr H2O)
Primer type large rifle
Ballistic performance
Bullet weight/type Velocity Energy
100 gr (6 g) Norma Oryx Bonded SP 2,953 ft/s (900 m/s) 1,937 ft·lbf (2,626 J)
Source(s): Norma[1]

6mm XC (also known as 6XC) is a rifle cartridge, similar to the 6x47mm Swiss Match, that was developed specifically for NRA High Power match shooting by 11-time NRA High Power National Champion David Tubb. It is touted as being one of the most accurate long-range 6 mm rounds in the world that is designed for repeating rifles.

Originally, the case for this wildcat cartridge had to be formed from .22-250 brass, but it is now commercially available.


The 6XC is a 1000 yard cartridge, comparable to benchrest calibers such as 6x47mm Swiss Match, 6.5×47mm Lapua and 6 mm/22-250; it fits into cartridge class that exceeds the velocities of benchrest calibers such as 6mm BR Remington, 6mm BRX and 6mm Dasher. The 6XC has claimed several wins in NRA High Power National Championships and a number of NRA Long Range championship events (1000 yard events).

Muzzle velocity

  • 7.45 g (115 gr) Hollow Point Boat Tail (HPBT): 3,000 ft/s (910 m/s)


  1. Norma 6XC Oryx data sheet. Retrieved 8 April, 2013.

See also

External links