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6mm XC Ammo

6mm XC Ammo For Sale- Top Retailers Available

6mm XC (also known as 6XC) is a "wildcat" rifle cartridge, similar to the 6x47mm Swiss Match. The 6mm XC was initially developed specifically for the 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 rounds in the world that is designed for repeating rifles.

Initially, the case for this wildcat had to be formed from .250 Savage 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.

About: 6mm XC

  • Type: Rifle
  • Place of origin: United States
  • 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 mass/type Velocity Energy
95gr(6g) Nosler Ballistic Tip 2,953ft/s(900m/s) 1,840ft⋅lbf(2,490J)
95gr(6g) Norma Jaktmatch FMJ 2,953ft/s (900m/s) 1,840ft⋅lbf (2,490J)
100gr(6g) Norma Oryx Bonded SP 2,953ft/s (900m/s) 1,937ft⋅lbf (2,626J)


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