6 mm XC

6mm XC
Type	Rifle
Place of origin	United States
Production history
Designer	David Tubb
Manufacturer	Commercially by Norma
Specifications
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 95 gr (6 g) Nosler Ballistic Tip 2,953 ft/s (900 m/s) 1,840 ft⋅lbf (2,490 J) 95 gr (6 g) Norma Jaktmatch FMJ 2,953 ft/s (900 m/s) 1,840 ft⋅lbf (2,490 J) 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

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.

Performance

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)

See also

• List of firearms
• List of handgun cartridges
• List of rifle cartridges
• List of individual weapons of the U.S. Armed Forces

External links

• 6XC at 6mmBR.com
• 6 mm XC at DavidTubb.com
• David Tubb on Rifling
• 6mm XC Brass Measurement Data