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6mm XC
6 mm XC cartridge
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 cm (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 / 6.17x48mm (also known as 6XC) is a rifle cartridge, similar to the 6x47mm Swiss Match.

History

The 6mm XC was initially developed as a Wildcat cartridge specifically for NRA High Power match shooting by 11-time US National Champion David Tubb. The round originated from chambering a barrel using a .243 Winchester reamer held short, with the case reformed from .22-250. The round is optimised for bullets heavier than 100 grains to improve performance at long ranges - .243Win typically uses bullets lighter than 100 grains. It is touted as being one of the most accurate long-range 6 mm rounds in the world that is designed for repeating rifles.

The 6XC is now a CIP standardized case. The origin is listed as Sweden since Norma standardised the case. Factory brass is available from Norma and Peterson.

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. David Tubb has claimed several wins with the 6XC 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

References

1. Norma 6XC Oryx data sheet. Retrieved 8 April 2013.
2. ^ "6XC Cartridge Guide". 6mmbr.com. Archived from the original on 10 December 2004. Retrieved 4 May 2023.
3. German A. Salazar (May 2007). "6XC for Competitive Shooting". AccurateShooter.com. Archived from the original on 13 May 2011. Retrieved 4 May 2023.
4. Peter Jones (18 August 2015). "6mm XC Norma". Country Deer Stalking. Archived from the original on 25 October 2020. Retrieved 4 May 2023.
5. "6XC - Table of Dimensions of Cartridges and Chamber" (PDF). Commission Internationale Permanente (C.I.P.) pour l'épreuve des armes à feu portatives. 8 April 2015. pp. PDF. Archived (PDF) from the original on 7 May 2021. Retrieved 4 May 2023.
6. Vince Bottomley (20 April 2015). "Wildcats I Have Known and Loved – the 6XC". Target Shooter. Archived from the original on 5 December 2018.

External links

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

v t e Intermediate cartridges
LE & Paramilitary	.22 Spitfire .221 Remington Fireball .300 AAC Blackout .375 SOCOM .450 Bushmaster .45 Raptor .458 HAM'R .458 SOCOM .50 Beowulf .500 Auto Max 6.5mm Grendel 7.62×37mm Musang 7.62×45mm Pindad 8.6 mm Blackout 9×39mm .510 Whisper
Service issue	5.45×39mm 5.56×45mm NATO 5.8×42mm .30 Carbine 7.62×39mm 7.62×45mm 7.92×33mm Kurz
Premodern	10.4x38mmR 10.4×47mmR 11x42mmR Albini-Comblain 11×50mmR Comblain 11mm Beaumont 12.17×42mm RF 12x46mmR Musket Spain XPL .22 Winchester Centerfire .25-20 Winchester .32-20 Winchester .43 Spanish Carbine .45-60 Winchester .45-75 WCF .433 Egyptian .50-70 Government 14×33mmR Wänzl 15.24х40R Krnka
Commercial	Calhoon cartridges .20 VarTarg 5 mm/35 SMc .20 Tactical .204 Ruger 5.6×39mm .22-250 Remington .22 PPC .219 Zipper .224 Valkyrie .222 Remington .225 Winchester 6mm BR 6mm PPC 6 mm XC 6mm ARC 6.5mm Creedmoor 6mm AR 6×45mm .25-45 Sharps .250-3000 Savage 6.5×47mm Lapua .277 Wolverine 7mm BR Remington 7×33mm Sako 7.62×40mm Wilson Tactical .30 Remington AR .350 Legend .35 Remington .360 Buckhammer .401 Winchester Self-Loading
Prototype	.351 Winchester Self-Loading .345 Winchester Self-Loading 4.85×49mm 5.6x48mm Eiger 6×45mm SAW 6.45×48mm XPL Swiss 6.5×39mm 6.8mm Remington SPC .280 British 7.5×38mm 7.5×38mm 7.65×33mm 7.65×35mm 7.75×39mm GeCo 7.92×41mm 12.7×55mm STs-130

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