View source for 10mm Auto

{{Short description|Firearm cartridge}}
{{Infobox firearm cartridge
|name=10mm Auto
|image=10MM AUTO - FMJ - 1.jpg | image_size = 300px
|caption=10mm Auto [[full metal jacket bullet|jacketed flat point]] cartridge
|type=[[Pistol]]
|origin=United States/Sweden
<!-- Service history -->
|used_by={{unbulleted list
 |[[Hostage Rescue Team|FBI Hostage Rescue Team]]<ref name="HRT">{{Cite web
  |title=AMERICAN SPECIAL OPS – FBI HRT
  |url=http://www.americanspecialops.com/hostage-rescue-team/
  |access-date=2015-01-30
  }}</ref>
 |[[FBI Special Weapons and Tactics Teams]]<ref name="SWAT">{{Cite web
  |title=AMERICAN SPECIAL OPS – FBI SWAT
  |url=http://www.americanspecialops.com/fbi-swat/
  |access-date=2015-01-30}}</ref><ref>{{Cite web
  |title=FBI – Tools of the Trade – SWAT (Text Only)
  |url=https://www.fbi.gov/news/stories/2008/november/swat111708
  |access-date=2015-01-30
  }}</ref>
 |[[Slædepatruljen Sirius]]<ref name="Sirius">{{cite web
  | url=http://www.casr.ca/ft-harper1-6.htm
  | title=Permanent Presence: Recruiting, Training, & Equipping Rangers in the Arctic
  | publisher=Canadian American Strategic Review
  | date=December 2005
  | access-date=2015-01-30
  | last1=DeMille | first1=Dianne
  | last2=Priestley | first2=Stephen
  | archive-url=https://web.archive.org/web/20100708215900/http://www.casr.ca/ft-harper1-6.htm
  | archive-date=2010-07-08
  }}</ref>
 }}
<!-- Production history -->
|designer={{unbulleted list
 | [[Jeff Cooper]]
 | [[Norma Precision|FFV Norma AB]]
 }}
|design_date=1983
|production_date=1983–present
|variants={{unbulleted list
 | [[.224 Boz]]
 | [[.357 SIG]]
 | [[.40 S&W]]
 | [[9×25mm Dillon]]
 | [[9×25mm Super Auto G]]
 }}
<!-- Specifications -->
|is_SI_specs=yes
|parent=[[.30 Remington]]<ref>{{Cite book
 |last=Donnelly
 |first=John J.
 |year=1987
 |title=The Handloader's Manual of Cartridge Conversions
 |publisher=Stoeger Publishing Company
 |page=941
 |isbn=0-88317-136-8}}</ref><ref>{{Cite book
 |last=Howell
 |first=Ken
 |year=1995
 |title=Designing and Forming Custom Cartridges For Rifles and Handguns
 |publisher=Precision Shooting, Inc
 |page=546
 |isbn=0-9643623-0-9
 }}</ref>
|case_type={{unbulleted list
 | [[Rim (firearms)#Rimless|Rimless]]
 | [[Headspace (firearms)|Straight]]
 }}
|bullet={{unbulleted list
 |'''C.I.P.:''' {{Convert|10.16|mm|in|abbr=on}}<ref name="C.I.P.">{{Cite web
  |title=C.I.P. – Table of Dimensions for Cartridge and Chamber of 10 mm Auto
  |url=http://www.cip-bobp.org/homologation/uploads/tdcc/tab-iv/10-mm-auto-en.pdf
  |access-date=2015-01-30
  }}</ref>
 |'''SAAMI:''' {{Convert|.4005|in|mm|abbr=on}}<ref name="SAAMI">{{Cite web
 |title        = SAAMI – Maximum Cartridge/Minimum Chamber Drawings for 10mm Automatic
 |url          = http://www.saami.org/PubResources/CC_Drawings/Pistol/10mm%20Automatic.pdf
 |access-date   = 2015-01-30
 |archive-url  = https://web.archive.org/web/20150130113018/http://www.saami.org/PubResources/CC_Drawings/Pistol/10mm%20Automatic.pdf
 |archive-date = 2015-01-30
 |url-status     = dead
}}</ref>
 }}
|neck={{unbulleted list
 |'''C.I.P.:''' {{Convert|10.74|mm|in|abbr=on}}<ref name="C.I.P."/>
 |'''SAAMI:''' {{Convert|.423|in|mm|abbr=on}}<ref name="SAAMI"/>
 }}
|base={{unbulleted list
 |'''C.I.P.:''' {{Convert|10.80|mm|in|abbr=on}}<ref name="C.I.P."/>
 |'''SAAMI:''' {{Convert|.425|in|mm|abbr=on}}<ref name="SAAMI"/>
 }}
|rim_dia={{unbulleted list
 |'''C.I.P.:''' {{Convert|10.80|mm|in|abbr=on}}<ref name="C.I.P."/>
 |'''SAAMI:''' {{Convert|.425|in|mm|abbr=on}}<ref name="SAAMI"/>
 }}
|rim_thick={{unbulleted list
 |'''C.I.P.:''' {{Convert|1.40|mm|in|abbr=on}}<ref name="C.I.P."/>
 |'''SAAMI:''' {{Convert|.055|in|mm|abbr=on}}<ref name="SAAMI"/>
 }}
|case_length={{unbulleted list
 |'''C.I.P.:''' {{Convert|25.20|mm|in|abbr=on}}<ref name="C.I.P."/>
 |'''SAAMI:''' {{Convert|.992|in|mm|abbr=on}}<ref name="SAAMI"/>
 }}
|length={{unbulleted list
 |'''C.I.P.:''' {{Convert|32.00|mm|in|abbr=on}}<ref name="C.I.P."/>
 |'''SAAMI:''' {{Convert|1.260|in|mm|abbr=on}}<ref name="SAAMI"/>
 }}
|case_capacity=1.56
|rifling=406.40 mm (1 in 16 inches)<ref name="C.I.P."/><ref name="SAAMI"/>
|primer=[[Centerfire ammunition#Boxer primer sizes|Large pistol]]
|pressure_method=C.I.P.
|max_pressure={{Convert|230|MPa|psi|abbr=on}}<ref name="C.I.P. Pressure">{{Cite web
 |title        = C.I.P. – List of TDCC – Tab IV – Pistol and revolver cartridges
 |url          = http://www.cip-bobp.org/homologation/en/tdcc_public?page=2&cartridge_type_id=4
 |access-date   = 2015-01-30
 |archive-url  = https://web.archive.org/web/20150130103121/http://www.cip-bobp.org/homologation/en/tdcc_public?page=2&cartridge_type_id=4
 |archive-date = 2015-01-30
 |url-status     = dead
}}</ref>
|pressure_method2=SAAMI
|max_pressure2={{Convert|37500|psi|MPa|abbr=on}}<ref name="SAAMI Pressure">{{Cite web
 |title=SAAMI – Velocity & Pressure Data: Centerfire Pistol & Revolver 
 |url=http://www.saami.org/specifications_and_information/specifications/Velocity_Pressure_CfPR.pdf 
 |access-date=2015-01-30 
 |url-status=dead 
 |archive-url=https://web.archive.org/web/20150319133613/http://saami.org/specifications_and_information/specifications/Velocity_Pressure_CfPR.pdf 
 |archive-date=2015-03-19 
}}</ref>
<!-- Ballistic performance -->
<!-- Ballistic data, load 1 -->
|bw1=175
|btype1=STHP Winchester
|vel1=1290
|en1=649
<!-- Ballistic data, load 2 -->
|bw2=180
|btype2=FMJ Federal
|vel2=1300
|en2=708
<!-- Ballistic data, load 3 -->
|bw3=77
|btype3=RBCD TFSP 
|vel3=2420
|en3=1001
<!-- Ballistic data, load 4 -->
|bw4=155
|btype4=Underwood XTP-JHP 
|vel4=1500
|en4=775
<!-- Ballistic data, load 5 -->
|bw5=155
|btype5=Underwood FMJ-FN 
|vel5=1500
|en5=775
<!-- Ballistics data source -->
|test_barrel_length={{Convert|117|mm|in|abbr=off}}<ref>{{cite web |title=Glock 20 {{pipe}} G20 {{pipe}} 10mm Pistol {{pipe}} GLOCK USA |url=http://us.glock.com/products/model/g20 |archive-url=https://archive.today/20141219201148/http://us.glock.com/products/model/g20 |archive-date=2014-12-19 |url-status=dead |access-date=2015-01-21 }}</ref>
|balsrc=[https://www.underwoodammo.com/10mm-auto-155-grain-xtp-jacketed-hollow-point.html Underwood Ammunition XTP-JHP]
[https://www.underwoodammo.com/10mm-auto-155-grain-full-metal-jacket.html Underwood Ammunition FMJ-FN] 
[https://www.ammunitiontogo.com/product_info.php/pName/20rds-10mm-rbcd-performance-plus-77gr-total-fragmenting-soft-point-ammo RBCD Performance Plus Ammunition]
}}

The '''10mm Auto''' (also known as the 10×25mm, official [[Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives|C.I.P.]] nomenclature: '''10&nbsp;mm Auto''',<ref name="C.I.P."/> official [[Sporting Arms and Ammunition Manufacturers' Institute|SAAMI]] nomenclature: '''10mm Automatic''')<ref name="SAAMI"/> is a powerful and versatile [[semi-automatic pistol]] [[Cartridge (firearms)|cartridge]] introduced in 1983. Its design was adopted and later produced by [[ammunition]] manufacturer [[Norma Precision|FFV Norma AB]] of [[Åmotfors]], [[Sweden]].<ref name="BREN-TEN.com Website">{{cite web | url=http://www.bren-ten.com/website/id7.html | title=The 10mm Auto Cartridge | publisher=BREN-TEN.com Website | access-date=2015-01-30 | archive-url=https://web.archive.org/web/20150213081333/http://www.bren-ten.com/website/id7.html | archive-date=2015-02-13 | url-status=dead }}</ref>

The 10mm was selected for service by the [[Federal Bureau of Investigation]] (FBI) in 1989 in the aftermath of the [[1986 FBI Miami shootout]].  During the testing and development process, the FBI Firearms Training Unit developed a downloaded version of the 10mm cartridge which they felt provided adequate performance while minimizing recoil and muzzle blast. <ref name="BREN-TEN.com Website"/>  It is commonly claimed that this reduced loading was developed as the result of complaints or training problems involving agents who were issued the 10mm, but the reduced loading was developed before any pistols were issued.  The cartridge was later decommissioned (except for use by the [[Hostage Rescue Team]] and [[FBI Special Weapons and Tactics Teams|Special Weapons and Tactics Teams]]) primarily due to problems with the S&W 10mm issue pistols which were recalled in 1991.  That same year, the FBI began issuing SIG pistols chambered in 9mm as an interim solution while problems with the S&W 10mm pistols were being worked.  In the meantime, S&W and Winchester developed the .40S&W cartridge which duplicated the performance of the FBI's reduced 10mm loading but in a shorter package which was suited for use in pistols sized for the 9mm cartridge.  The .40S&W was introduced in 1990, but the FBI didn't adopt it for some years thereafter.  The FBI eventually switched to the [[.40 S&W]] cartridge, and began issuing .40S&W pistols to agents in 1997.  The .40S&W remained the FBI's issue cartridge until they reverted to the 9mm in 2015.<ref>{{cite news |title=FBI returns to 9mm rounds, once shunned as ineffective |url=https://www.washingtonpost.com/world/national-security/fbi-moves-back-to-the-9mm-round-which-it-once-shunned-as-ineffective/2015/10/31/d7d0b994-7e80-11e5-afce-2afd1d3eb896_story.html |newspaper=Washington Post}}</ref>

==History==
[[File:DCB Shooting Bren Ten & SW 610.jpg|thumb|left|The [[Bren Ten]] (left) and [[Smith & Wesson Model 610]] Classic (right), 1983.]]

When [[Norma Precision|FFV Norma AB]] (now [[Norma Precision|Norma Precision AB]]) designed the cartridge at the behest of Dornaus & Dixon Enterprises, Inc. for their [[Bren Ten]] pistol (a newly developed [[handgun]] with a design inspired by the [[CZ 75]]), the company decided to increase the power over [[Jeff Cooper]]'s original concept. The resulting cartridge—which was introduced in 1983 and produced since—is very powerful, retaining the flat trajectory and high energy of a [[Magnum cartridge|magnum]] [[revolver]] cartridge in a relatively short, versatile rimless cartridge for a [[semi-automatic pistol]].<ref name="BREN-TEN.com Website"/>

Quality control issues plagued early acceptance of the caliber, as a result of rushed production to meet numerous (some even defaulted) pre-orders of the pistol it was originally—as well as then being only—chambered for: the [[Bren Ten]].<ref>{{cite web | url=http://www.bren-ten.com/website/id2.html | archive-url=https://web.archive.org/web/20160405195319/http://www.bren-ten.com/website/id2.html | archive-date=2016-04-05 | title=Dornaus & Dixon Enterprises And The Bren Ten PART 3: The Demise of Dornaus & Dixon And The Bren Ten | publisher=BREN-TEN.com Website | access-date=2015-01-30}}</ref> An example is the peculiar circumstances surrounding the pistol's distribution at its primary release, leading to a number of initial Bren Tens sent to dealers and customers without magazines (the magazines themselves had complications).<ref>{{cite web | url=http://www.bren-ten.com/website/id3.html | title=The Bren Ten In Detail PART 1: Bren Ten Production Modifications | publisher=BREN-TEN.com Website | access-date=2015-01-30}}</ref> The relatively high price of the Bren Ten compared to other pistols of the time ([[Suggested retail price|manufacturer's suggested retail price]] was $500 in 1986, the equivalent of $1,200 [[United States dollars]] in 2021<ref>[https://www.usinflationcalculator.com/ US Inflation Calculator], accessed April 4, 2021.</ref>) was another factor in its demise, and the company was eventually forced to declare [[bankruptcy]], ceasing operations in 1986 after only three years of inconsistent, substandard production. Had it not been for [[Colt's Manufacturing Company|Colt]] making the unexpected decision in 1987 to bring out their [[Colt Delta Elite|Delta Elite]] pistol (a 10mm Auto version of the [[M1911 pistol|M1911]]) and later, the FBI's adoption of the caliber in 1989, the cartridge might have sunk into obsolescence, becoming an obscure footnote in firearms history.<ref name="HoggWalter2004">{{cite book|last1=Hogg|first1=Ian V.|author-link1=Ian V. Hogg|last2=Walter|first2=John|title=Pistols of the World|url=https://books.google.com/books?id=okQH6zFgDtUC&pg=PA88|date=29 August 2004|publisher=David & Charles|isbn=0-87349-460-1|page=88}}</ref>

[[File:Var1bluede.jpg|thumb|left|[[Colt Delta Elite]]]]

Due to media exposure in the television series ''[[Miami Vice]]'', where [[Sonny Crockett|one of the lead protagonists]] had [[Firearms in Miami Vice#Sonny Crockett|used the pistol as his primary signature weapon]], demand for the Bren Ten increased after manufacturing ceased. In the succeeding five years, prices on the Standard Model rose to in excess of U.S. $1,400, and original magazines were selling for over U.S. $150.<ref>{{Cite book |last=Fjestad |first=S. P. |year=1992 |title=Blue Book of Gun Values
 |edition=13th |publisher=Blue Book Publications, Inc |isbn=0-9625943-4-2}}</ref><ref name="Sweeney2008">{{cite book|last=Sweeney|first=Patrick|author-link=Patrick Sweeney (gunsmith)|title=The Gun Digest Book Of The Glock|url=https://books.google.com/books?id=5xdZU0RJqswC&pg=PA60|date=30 May 2008|publisher=F+W Media|location=Iola, Wisconsin|isbn=978-1-4402-2427-0|pages=60–61}}</ref>

The [[Federal Bureau of Investigation]] briefly field-tested the 10mm Auto using a [[M1911 pistol]] and a [[Thompson submachine gun#Model 1928|Thompson Model 1928 submachine gun]]<ref>{{Cite magazine |last=Hill |first=Tracie |date=2008 |title=WHAT'S NEW |url=http://www.nfatoys.com/tsmg/tata/2008_q2/page00006.htm |volume=10 |issue=2nd. QTR., 2008 |magazine=The American Thompson Association newsletter |publisher= The American Thompson Association |page=6 |access-date=2015-01-30}}</ref><ref>{{cite web | url=https://www.americanrifleman.org/content/full-power-full-auto-the-thompson-goes-metric-and-the-mp5-goes-american/ | title=An Official Journal of the NRA &#124; Full Power/Full Auto: The Thompson Goes Metric and the MP5 Goes American }}</ref> as an "urban carbine" before adopting the [[Smith & Wesson Model 1006|Smith & Wesson Model 1076]] in 1990; a short-barreled version of the [[Smith & Wesson Model 1006|Model 1026]] with its slide-mounted decock/firing pin block safety supplanted by only a frame-mounted decocker. A contract was signed with [[Heckler & Koch]] to produce a quantity of the specialized [[Heckler & Koch MP5|MP5]] utilizing the cartridge, designated [[Heckler & Koch MP5#Rechambered variants|MP5/10]] for use by their [[Hostage Rescue Team]] and [[FBI Special Weapons and Tactics Teams|Special Weapons and Tactics Teams]]. Since 1994, both units still field the weapon and caliber to this day.<ref name="HRT"/><ref name="SWAT"/>

The 10mm cartridge was selected for [[Federal Bureau of Investigation]] use after a Wound Ballistics Seminar at the FBI Academy in September 1987, which managed to agree what a good cartridge would do, but couldn't agree if 9mm or .45 ACP could meet FBI requirements.<ref name=":0">{{Cite web |title=FBI's 10mm Pistol {{!}} Office of Justice Programs |url=https://www.ojp.gov/ncjrs/virtual-library/abstracts/fbis-10mm-pistol |access-date=2024-12-21 |website=www.ojp.gov}}</ref> In the same year, an informal test was conducted using a variety of available 9mm and .45 ACP handguns. The test indicated that only the type of 9mm round, described as "147 grain subsonic hollow point round produced by Winchester" had acceptable penetration.<ref>{{Cite journal |date=1987 |title=FBI's 1987 Handgun Evaluation |url=https://www.ojp.gov/pdffiles1/Digitization/113821NCJRS.pdf |journal=}}</ref> The test seemed inconsistent or contradictory to future observers, and it was accused of heavy .45 ACP and American handgun bias.<ref>{{Cite AV media |url=https://www.youtube.com/watch?v=Ux8A4nPJJWs |title=The FBI Said This is the Best Handgun (and Why They're Wrong) |date=2022-07-07 |last=TFB TV |access-date=2024-12-21 |via=YouTube}}</ref> 

According to the latter 10mm report, it was decided: "five shots were fired in each of the 8 penetration tests, providing a total of 40 shots for each caliber or bullet type tested". The first selected was the 9mm described above. The second was a ".45 round, Remington 185 grain hollow point". The Wound Ballistic Workshop participants had a "consensus" that hollow points with "superior penetration" was what was needed.

The 10mm was picked as a "halfway" between the other two options, in terms of size. The "commercial loadings" had "high chamber pressures", which resulted in "heavy recoil" and "muzzle blast". A 180 grain hollow point bullet was "acquired and handloaded to a velocity of 950 feet per second". Later on, factory-loaded ammunition was acquired that met their requirements. During the trials, the 10mm was found to be comparable to the .45 ACP (Not surprising as the bullet weight and velocities were now so similar), but the 10mm was found to take up less space and produce shot groups on targets that were half the size.<ref name=":0" /> 

As the FBI was adopting a 10mm cartridge closer in bullet weight and velocity to the .45 ACP, there was a need for large amounts of newly built ammunition of this type. This requirement was later submitted to [[Federal Premium Ammunition]] for production and further review. This became known as the "10mm Lite", or "10mm FBI" load, or attenuated 10mm, remaining common from various manufacturers today. With some pistol reliability problems increasing in this lighter load,<ref name="Sweeney2008" /> [[Smith & Wesson]] observed that a version of the 10mm case reduced to 22 millimeters in length from the original 25&nbsp;mm could be made with the retained performance parameters of the "10mm Lite". This altered cartridge was named the [[.40 S&W|.40 Smith & Wesson]]. The shorter case allowed use in pistols designed with similar dimensions to those chambered in [[9×19mm Parabellum]], with the advantage that smaller-handed shooters could now have smaller-frame semi-automatic handguns. Colloquially called the "Forty Cal" and other synonyms, this innovation since became a common handgun cartridge among [[Law enforcement in the United States|law enforcement agencies]] and [[Gun culture in the United States|civilians in the United States]], while the parent 10mm Auto remains fairly popular and has shown a resurgence in recent years particularly among hunters.<ref name="BREN-TEN.com Website" />

== Dimensions ==
The 10mm Auto has 1.56 [[litre|milliliter]] (24.1 [[grain (unit)|grain]] {{Chem|H|2|O}}) cartridge case capacity.

[[file:10 mm Auto.jpg|400px|10mm Auto maximum C.I.P. cartridge dimensions. All sizes in [[millimeter]]s]]

'''10mm Auto maximum CIP cartridge dimensions'''<ref name="C.I.P."/>

The common [[rifling]] [[Rifling#Twist rate|twist rate]] for this cartridge is 406.40&nbsp;mm (1 in 16&nbsp;inches), 6 grooves, Ø lands = 9.91&nbsp;mm (.390&nbsp;in), Ø grooves = 10.17&nbsp;mm (.4005&nbsp;in), and land width = 3.05&nbsp;mm (.120&nbsp;in). A large or small pistol [[Centerfire ammunition#Centerfire primers|primer]] is used.<ref name="C.I.P."/><ref name="SAAMI"/>

The CIP rulings indicate a maximum pressure of {{Convert|230|MPa|psi|abbr=on}}. In CIP-regulated countries, every pistol/cartridge combination is required to be [[Proof test#Firearms|proofed]] at 130% of this maximum CIP pressure to certify for sale to consumers.<ref name="C.I.P. Pressure"/>

The SAAMI maximum pressure limit for the 10mm Auto is set at {{Convert|37500|psi|MPa|abbr=on}}.<ref name="SAAMI Pressure"/>

==Performance==
At mid-range potential, the 10mm Auto produces energy higher than average [[.357 Magnum]] loads. The 10mm is slightly less powerful than the .357 Magnum with high-performing commercially available ammunition, or hand-loaded .357 magnums, and below standard [[.41 Remington Magnum|.41 Magnum]] rounds. The cartridge is considered to be high-velocity, giving it a less arcing flight path upon firing (also termed "flat-shooting") relative to other handgun cartridges. More powerful loadings can equal the highest-performing .357 Magnum loads, and retain more kinetic energy at 100 yards than the [[.45 ACP]] has at the muzzle.<ref name="BREN-TEN.com Website"/>

The 10mm outperforms the .40 S&W by {{Convert|150|-|300|ft/s|m/s|abbr=on}} for similar bullet weights when using available full-power loads,<ref>Ballistics information on Underwood Ammo's full-power {{Convert|180|gr|g|abbr=on}} [http://www.underwoodammo.com/10mmauto180grainfullmetaljacketboxof50.aspx 10mm load] {{Webarchive|url=https://web.archive.org/web/20150121060037/http://www.underwoodammo.com/10mmauto180grainfullmetaljacketboxof50.aspx |date=2015-01-21 }}.</ref> as opposed to the "10mm FBI" level loads still found in some ammunition catalogs.<ref>Ballistics information on Federal Premium Ammunition's "10mm Lite" style American Eagle {{Convert|180|gr|g|abbr=on}} [http://www.federalpremium.com/products/details/handgun.aspx?id=67 10mm load].</ref><ref>Ballistics information on Federal Premium Ammunition's American Eagle {{Convert|180|gr|g|abbr=on}} [http://www.federalpremium.com/products/details/handgun.aspx?id=84 .40 S&W load].</ref> This result is due to the 10mm Auto's higher SAAMI pressure rating of {{Convert|37500|psi|MPa|abbr=on}},<ref name="SAAMI Pressure"/> as opposed to {{Convert|35000|psi|MPa|abbr=on}} for the .40 S&W,<ref name="SAAMI Pressure"/> and the larger case capacity, which allows the use of heavier bullets and more [[smokeless powder]].<ref name="Sweeney2004">{{cite book|last=Sweeney|first=Patrick|title=The Gun Digest Book of Smith & Wesson|url=https://books.google.com/books?id=_OtamYg8dq4C&pg=PA199|date=10 December 2004|publisher=Gun Digest Books|location=Iola, wisconsin|isbn=1-4402-2714-4|page=199}}</ref>

==Usage==
[[File:Glock 20.jpg|thumb|[[Glock#10mm Auto|Glock 20]]]]

[[File:GLOCK 29 10mm.jpg|thumb|[[Glock#10mm Auto|Glock 29]]]]

The 10mm Auto is marketed for hunting,<ref>{{Cite web |title=Natchez Shooters Supplies – COR-BON 10mm Auto 200 gr Hunting Penetrator 20/box |url=http://www.natchezss.com/product.cfm?contentID=productDetail&prodID=CBCB10200PN |access-date=2015-01-30 |archive-url=https://web.archive.org/web/20150121054947/http://www.natchezss.com/product.cfm?contentID=productDetail&prodID=CBCB10200PN |archive-date=2015-01-21 |url-status=dead }}</ref> defensive, and tactical use<ref>{{Cite web |title=Hornady Manufacturing Company – 10mm Auto 165 gr FTX Critical Defense |url=http://www.hornady.com/store/10mm-165-gr-CD/ |access-date=2015-01-30 |archive-url=https://web.archive.org/web/20150121060639/http://www.hornady.com/store/10mm-165-gr-CD/ |archive-date=2015-01-21 |url-status=dead }}</ref> and is one of the few semi-automatic, rimless cartridges that is legal for hunting [[white-tailed deer]] in many U.S. states.<ref name="Handgun Hunting">{{Cite web |last=Hawks |first=Chuck |year=2002
 |title=Handgun Hunting |archive-url=https://web.archive.org/web/20110501015713/http://www.chuckhawks.com/handgun_hunting.htm |url=http://www.chuckhawks.com/handgun_hunting.htm
 |archive-date=2011-05-01 |access-date=2015-01-30}}</ref><ref name="Glock 20">{{Cite web |last=Quinn |first=Jeff |date=2005-10-26 |title=Glock Model 20 10mm Auto Pistol|url=http://www.gunblast.com/Glock20.htm |access-date=2015-01-30}}</ref> The round makes the "Major" [[Power factor (pistol)|power factor ranking]] in the [[International Practical Shooting Confederation]], even in lighter loadings.<ref>[http://www.ipsc.org/rules/divlistP.php IPSC :: The Handgun Divisions List]</ref>

The FBI [[Hostage Rescue Team]], [[FBI Special Weapons and Tactics Teams|Special Weapons and Tactics Teams]], and various other law enforcement agencies continue to issue or authorize the use of 10mm, including: the [[Coconut Creek, Florida|Coconut Creek]] Police Department, Glasgow, Montana Police Department, [[Weimar, Texas|Weimar]] Police Department,<ref>{{Cite web
 |title=World Small Arms Inventory |url=https://sites.google.com/site/worldinventory/ |access-date=2015-01-30}}</ref> and the [[San Francisco]] [[Bay Area Rapid Transit Police Department|Bay Area Rapid Transit (BART) Police Department]].<ref>{{Cite news |last1=Richman |first1=Josh |last2=Alund |first2=Natalie Neysa |date=2014-01-22 |title=BART police shooting: Still unclear whether fellow officer mistook sergeant for threat |url=http://www.mercurynews.com/crime-courts/ci_24971843/bart-police-shooting-still-unclear-whether-fellow-officer
 |work=[[San Jose Mercury News]] |access-date=2015-01-30 |quote=Rainey said BART officers typically carry a 10 mm Glock or a .40-caliber Sig Sauer semi-automatic handgun, although some are authorized to carry other weapons.}}</ref>

In military use, the government of [[Denmark]] has issued the Glock 20 to the ''[[Slædepatruljen Sirius]]'' (Sirius Sledge Patrol) headquartered in [[Daneborg]], [[Northeast Greenland National Park|Northeast]] [[Greenland]].<ref name="Sirius"/> The pistols were issued as a last resort defence against [[polar bear]]s which the unit encounters during patrols.<ref>{{cite news | url=http://www.casr.ca/id-arcticviking4sb-1.htm | title=Automatics and Bolt-actions: Danish Small Arms in Greenland | publisher=Canadian American Strategic Review | date=May 2005 | access-date=2015-01-30 | archive-url=https://web.archive.org/web/20080920120203/http://www.casr.ca/id-arcticviking4sb-1.htm | archive-date=2008-09-20 | quote=Most Danish units use 9mm automatics like the CF but the Sirius Patrol learned through hard experience that 9mms had insufficient 'stopping power' to deal with angry adult polar bears. As a result, Sirius Patrol members carry a more powerful 10mm pistols for self-defence, employing the 10mm Glock 20 automatic.}}</ref><ref>{{cite web | url=http://www.specialoperations.com/Foreign/Denmark/ | title=Denmark Special Operations and Counterterrorist Forces – Slaedepatruljen Sirius - The Sledgepatrol Sirius (Arctic LRRP; Navy) | publisher=Special Operations.com | access-date=2015-01-30 | year=2000 | archive-url=https://web.archive.org/web/20110113214609/http://www.specialoperations.com/Foreign/Denmark/ | archive-date=2011-01-13 | quote=The weapons carried also reflect the harsh conditions. Only bolt-action rifles (M17/M53) performs reliably. The standard SIG210 Neuhausen sidearm was recently replaced by the 10mm Glock 20, as the stopping power of multiple 9mm rounds proved to be insufficient against a polar bear.}}</ref>

==See also==
*[[9×25mm Dillon]]
*[[10 mm caliber]]
*[[List of handgun cartridges]]
*[[Table of handgun and rifle cartridges]]

==References==
{{Reflist|2}}

==External links==
{{Commons category}}
*[https://web.archive.org/web/20110210151806/http://thegunzone.com/brenx/40ga.html The Gun Zone – Birth of the 10mm Autopistol Cartridge]
*[https://web.archive.org/web/20150213081333/http://www.bren-ten.com/website/id7.html BREN-TEN.com Website – The 10mm Auto Cartridge]
*[https://web.archive.org/web/20131110213445/http://cheaperthandirt.com/blog/?p=32678 Cheaper Than Dirt – Cartridge of the Week, the 10mm, 10mm Auto]
*[http://the10mmautoisaliveandwell.blogspot.com/ Blogger – The 10mm Auto pistol cartridge is Alive and Well]
*[http://www.brassfetcher.com/Handguns/10mm%20Auto/10mm%20Auto.html Brass Fetcher Ballistic Testing – 10mm Auto]
*[http://www.chuckhawks.com/10mm.htm CHUCKHAWKS.COM – 10mm Auto]
*[http://www.ballistics101.com/10mm.php Ballistics 101 – 10mm Ballistics Chart]
*[http://www.ballisticsbytheinch.com/10mm.html Ballistics By The Inch – 10mm Results]
*[https://web.archive.org/web/20170820051355/http://handloads.com/loaddata/default.asp?Caliber=10%20mm&Weight=All&type=Handgun&Order=Powder&Source= Handloads.Com – 10 mm Load Data]
*[https://web.archive.org/web/20170620025703/http://www.handloads.com/misc/stoppingpower.asp?Caliber=1&Weight=All Handloads.Com – 10 mm Stopping Power]
*[http://www.gunblast.com/Glock20.htm GunBlast.com – Glock Model 20 10mm Auto Pistol]
*[http://www.gunblast.com/RKCampbell_10mm.htm GunBlast.com – The 10mm]
*[http://www.gunblast.com/SW-610.htm GunBlast.com – Smith & Wesson Brings Back the 10mm Model 610 Revolver]
*[http://www.gunblast.com/10mm.htm GunBlast.com – The 10mm Auto Pistol]
*[http://www.gunblast.com/Colt-DeltaElite.htm GunBlast.com – Colt Delta Elite 10mm Semi-Automatic Pistol]
*[http://modernfirearms.net/en/cartridge/10mm-auto-10x25/ Modern Firearms: 10mm Auto Cartridge]

{{Carbine cartridges}}
{{30Remington}}

[[Category:10mm Auto firearms]]
[[Category:Weapons and ammunition introduced in 1983]]
[[Category:Military cartridges]]
[[Category:Paramilitary cartridges]]
[[Category:Pistol and rifle cartridges]]