View source for 6 mm XC

{{Short description|US rimless rifle cartridge}}
{{Notability|Product|date=January 2023}} 
{{infobox firearm cartridge
|name=6mm XC
|image= 6xc-cartridge.png
|caption= 6 mm XC cartridge
|origin=[[United States]]
|type=[[Rifle]]
<!-- Service history -->
|service= 
|used_by=
|wars= 
<!-- Production history -->
|designer=[[David Tubb]] 
|design_date=
|manufacturer=Commercially by [[Norma Precision|Norma]]
|production_date=
|number= 
|variants= 
<!-- Specifications -->
|is_SI_specs=yes
|parent=[[.250 Savage]]
|case_type=[[Rim (firearms)#Rimless|Rimless]], Bottleneck
|bullet=6.17
|neck=6.82
|shoulder=11.42
|base=11.84
|rim_dia=11.86
|rim_thick=1.22
|case_length=48.1
|length=63.4
|case_capacity=3.24
|rifling=
|primer=large rifle
|max_pressure=
|max_cup=
|filling=
|filling_weight=
|detonation=
|yield=
<!-- Ballistic performance -->
|is_SI_ballistics=
|bwunit=
|bw1=95 
|btype1=Nosler Ballistic Tip
|vel1=2953
|en1=1840
|bw2=95
|btype2=Norma Jaktmatch FMJ
|vel2=2953
|en2=1840
|bw3=100
|btype3=Norma Oryx Bonded SP
|vel3=2953
|en3=1937
|bw4=
|btype4=
|vel4=
|en4=
|bw5=
|btype5=
|vel5=
|en5=
|test_barrel_length=
|balsrc= Norma<ref>[http://www.norma.cc/sv/Produkter/Jakt/6XC/Oryx/ Norma 6XC Oryx data sheet]. Retrieved 8 April 2013.</ref>
}}
'''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 [[High power rifle| NRA High Power]] match shooting by 11-time US National Champion [[David Tubb]].<ref name="6mmbr.com">{{cite web |title=6XC Cartridge Guide |url=https://www.6mmbr.com/6XC.html |url-status=live |archive-url=https://web.archive.org/web/20041210084512/https://www.6mmbr.com/6XC.html |archive-date=10 December 2004 |access-date=4 May 2023 |website=6mmbr.com |language=English}}</ref><ref>{{cite web |author1=German A. Salazar |title=6XC for Competitive Shooting |url=https://www.accurateshooter.com/cartridge-guides/6xc-for-competitive-shooting/ |website=AccurateShooter.com |access-date=4 May 2023 |archive-url=https://web.archive.org/web/20110513042025/https://www.accurateshooter.com/cartridge-guides/6xc-for-competitive-shooting/ |archive-date=13 May 2011 |language=English |date=May 2007 |url-status=live}}</ref> The round originated from chambering a barrel using a [[.243 Winchester]] reamer held short, with the case reformed from [[.22-250]].<ref name="6mmbr.com"/> The round is optimised for bullets heavier than 100 [[Grain (unit)|grains]] to improve performance at long ranges - .243Win typically uses bullets lighter than 100 grains.<ref>{{cite web |author1=Peter Jones |title=6mm XC Norma |url=https://www.countydeerstalking.co.uk/blog/6mm-xc-norma |website=Country Deer Stalking |access-date=4 May 2023 |archive-url=https://web.archive.org/web/20201025014344/https://www.countydeerstalking.co.uk/blog/6mm-xc-norma |archive-date=25 October 2020 |language=English |date=18 August 2015 |url-status=live}}</ref> It is touted as being one of the most accurate long-range [[6 mm caliber|6 mm]] rounds in the world that is designed for repeating rifles.{{Citation Needed|date=May 2023}}

The 6XC is now a [[Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives|CIP]] standardized case.<ref>{{cite web |title=6XC - Table of Dimensions of Cartridges and Chamber |url=https://bobp.cip-bobp.org/uploads/tdcc/tab-i/tabical-en-page17.pdf |website=Commission Internationale Permanente (C.I.P.) pour l'épreuve des armes à feu portatives |access-date=4 May 2023 |archive-url=https://web.archive.org/web/20210507015637/https://bobp.cip-bobp.org/uploads/tdcc/tab-i/tabical-en-page17.pdf |archive-date=7 May 2021 |pages=PDF |language=English |date=8 April 2015 |url-status=live}}</ref> The origin is listed as Sweden since Norma standardised the case. Factory brass is available from Norma and Peterson.<ref>{{cite web |author1=Vince Bottomley |title=Wildcats I Have Known and Loved – the 6XC |url=http://www.targetshooter.co.uk/?p=1354 |website=Target Shooter |archive-url=https://web.archive.org/web/20181205154018/http://www.targetshooter.co.uk/?p=1354 |archive-date=5 December 2018 |language=English |date=20 April 2015 |url-status=live}}</ref>

==Performance==
[[File:6mm-XC-Diagram-Inches.svg|thumb|left|6 mm XC diagram in Inches]]
The 6XC is a 1000-yard cartridge, comparable to [[benchrest shooting|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|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&nbsp;ft/s (910&nbsp;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==
{{reflist}}

== External links ==
*[http://www.6mmbr.com/6XC.html 6XC at 6mmBR.com]
*[https://web.archive.org/web/20060225015607/http://www.davidtubb.com/6mmxc.html 6 mm XC at DavidTubb.com]
*[https://web.archive.org/web/20160303171924/http://www.zediker.com/books/rifleshooter/rs_web_promos/rs_barrels_spread.pdf David Tubb on Rifling]
*[http://bisonballistics.com/articles/norma-6mm-xc-brass 6mm XC Brass Measurement Data]

{{Intermediate cartridges}}
{{.30-03_Springfield}}

[[Category:Pistol and rifle cartridges]]
[[Category:Wildcat cartridges]]


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