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The AR-15 platform is a civilian platform. The M16 or M4 is a military platform
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{{Short description|American rifle cartridge by Hornady}}
{{Infobox firearm cartridge
{{Infobox firearm cartridge
| name = 6 mm Advanced Rifle Cartridge
| name = 6mm Advanced Rifle Cartridge
| image = Rifle cartridges (l. to r.) .308 Win, 6mm ARC, 300 AAC, .223 Rem.jpg
| image =
| alt = Rifle cartridges (l. to r.) .308 Win, 6mm ARC, 300 AAC, .223 Rem
| alt =
| caption = Rifle cartridges (l. to r.) .308 Win, 6mm ARC, 300 AAC, .223 Rem
| caption =
| type = Centerfire rifle
| type = Centerfire rifle
| origin = [[United States]]
| origin = [[United States]]
Line 14: Line 15:
| design_date =
| design_date =
| manufacturer = [[Hornady]]
| manufacturer = [[Hornady]]
| production_date = 2020-present
| production_date = 2020–present
<!-- Specifications -->
<!-- Specifications -->
| is_SI_specs = yes
| is_SI_specs = yes
| parent = [[5.6×39 mm]] (.220 Russian), [[6.5mm Grendel]]<ref>[https://www.firearmsnews.com/editorial/new-from-hornady-6mm-arc/376909 Hornady 6mm ARC Cartridge - What You Need to Know]</ref>
| parent = [[.220 Russian]]/6.5mm Grendel<ref name="firearmsnews"/>
| case_type = Rimless, bottleneck
| case_type = Rimless, bottleneck
| bullet = 6.18
| bullet = 6.18
| bullet_ref = <ref name="6mm-ARC-drawings">[https://saami.org/wp-content/uploads/2020/06/6mm-ARC-Public-Introduction-Rev-2020-06-18.pdf Public Introduction - 6.5 Creedmoor - 6mm-ARC-Public-Introduction-Rev-2020-06-18.pdf]</ref>
| bullet_ref = <ref name="6mm-ARC-drawings">{{Cite web |url=https://saami.org/wp-content/uploads/2020/06/6mm-ARC-Public-Introduction-Rev-2020-06-18.pdf |title=Public Introduction - 6.5 Creedmoor - 6mm-ARC-Public-Introduction-Rev-2020-06-18.pdf |access-date=2020-07-24 |archive-date=2020-10-01 |archive-url=https://web.archive.org/web/20201001120735/https://saami.org/wp-content/uploads/2020/06/6mm-ARC-Public-Introduction-Rev-2020-06-18.pdf |url-status=dead }}</ref>
| neck = 6.96
| neck = 6.96
| neck_ref = <ref name="6mm-ARC-drawings"/>
| neck_ref = <ref name="6mm-ARC-drawings"/>
Line 27: Line 28:
| base = 11.201
| base = 11.201
| base_ref = <ref name="6mm-ARC-drawings"/>
| base_ref = <ref name="6mm-ARC-drawings"/>
| rim_dia = 10.44mm* (0.4410 in)
| rim_dia = 11.20
| rim_dia_ref = <ref name="SAAMI">[[SAAMI]] (2020): [https://saami.org/wp-content/uploads/2021/06/6mm-ARC-Public-Introduction-Rev-2020-07-29.pdf 6mm Advanced Rifle Cartridge [6mm ARC<nowiki>]</nowiki>]. Retrieved 2023-01-16.</ref>
| rim_dia_ref = <ref name="6mm-ARC-drawings"/>
| rim_thick = 1.5
| rim_thick = 1.5
| rim_thick_ref = <ref name="firearmsnews">[https://www.firearmsnews.com/editorial/new-from-hornady-6mm-arc/376909 Hornady 6mm ARC Cartridge - What You Need to Know]</ref>
| rim_thick_ref = <ref name="firearmsnews">[https://www.firearmsnews.com/editorial/new-from-hornady-6mm-arc/376909 Hornady 6mm ARC Cartridge - What You Need to Know]</ref>
Line 37: Line 38:
| case_capacity = 2.20
| case_capacity = 2.20
| case_capacity_ref = {{citation needed|date=July 2020}}
| case_capacity_ref = {{citation needed|date=July 2020}}
| rifling = 190.5 mm (1:7.50")
| rifling = 190.5 mm (1:7.50 in)
| primer = Small rifle
| primer = Small rifle
| max_pressure = 358.53
| max_pressure = 358.53
Line 60: Line 61:
| balsrc = <ref name="Hornady-6mm-ARC-info-page">[https://www.hornady.com/6mmarc 6mm ARC - Hornady Manufacturing, Inc]</ref>
| balsrc = <ref name="Hornady-6mm-ARC-info-page">[https://www.hornady.com/6mmarc 6mm ARC - Hornady Manufacturing, Inc]</ref>
}}
}}
The '''6 mm Advanced Rifle Cartridge''' (6×38mm), or '''6mm ARC''' for short, is a [[6mm caliber|6mm (.243) caliber]] [[intermediate cartridge|intermediate]] [[rifle cartridge]] introduced by [[Hornady]] in 2020, as a low-[[recoil]], high-[[accuracy]] [[long range shooting|long-range]] [[cartridge (firearms)|cartridge]] designed for the [[AR-15]] platform.
The '''6mm Advanced Rifle Cartridge''' (6×38mm), or '''6mm ARC''' for short, is a [[6mm caliber|6 mm (.243) caliber]] [[intermediate cartridge|intermediate]] [[rifle cartridge]] introduced by [[Hornady]] in 2020, as a low-[[recoil]], high-[[accuracy]] [[long range shooting|long-range]] [[cartridge (firearms)|cartridge]], designed for use in the [[M16]] platform at request of a specialized group within the U.S. DoD for its multipurpose combat rifle program.<ref name="Hornady-6mm-ARC-info-page" />

⚫
The cartridge makes use of 6&nbsp;mm (.243) [[bullet]]s, which are known for their high [[ballistic coefficient]]s due to the high [[sectional density]] with less [[drag (physics)|drag]] and better [[kinetic energy|energy]] retention at extended ranges. With the release in 2020, Hornady also launched three factory loads with {{cvt|103|,|105|and|108|gr|g}} bullet weights and advertised G1 ballistic coefficients of .512, .530 and .536 respectively.<ref>[https://www.all4shooters.com/en/shooting/ammunition/hornady-6-mm-arc-new-ar-15-caliber-features/ Brand new rifle caliber: 6 mm ARC, Hornady's Advanced Rifle Cartridge! | all4shooters]</ref>

⚫
== Compatibility with the AR-15 ==
⚫
For an ordinary AR-15 rifle chambered for the [[.223 Remington|.223 Rem]]/[[5.56mm NATO]], a new [[gun barrel|barrel]], [[magazine (firearms)|magazine]] and [[bolt (firearms)|bolt]] are required to convert to the 6mm ARC.<ref>[https://www.gunsamerica.com/digest/hornadys-new-6mm-arc-odin-works-barrels-first-field-tests/ Hornady's NEW 6mm ARC & Odin Work's Barrels - www.gunsamerica.com]</ref> The 6mm ARC utilizes the same bolt head size as the [[6.5mm Grendel]], and 6.5mm Grendel-compatible [[STANAG magazine|AR-pattern]] [[box magazine]]s have also been used successfully with the 6mm ARC.<ref>[https://gununiversity.com/6mm-arc-review/ gununiversity.com | 6mm ARC Released / Hands-On Testing and Comparisons, by Ryan Cleckner 3 June 2020]</ref> The 6mm ARC therefore can also be a suitable chambering for shorter "mini-action" [[bolt-action rifle]]s.{{Cn|date=September 2021}}

Several firearm manufacturers have announced that they will be offering factory rifles chambered in the 6mm ARC.<ref>[https://www.tactical-life.com/firearms/rifles/rifles-hornady-6mm-arc/ “With the announcement of the Hornady 6mm ARC cartridge, an incredible 22 companies plan rifles for the consumer market, with more on the way.” – Tactical Life Gun Magazine: Gun News and Gun Reviews]</ref><ref>[https://www.ammoland.com/2020/06/cmmg-announces-new-rifles-chambered-in-6mm-arc/ CMMG Announces New Rifles Chambered in 6mm ARC]</ref>

== Diagram ==
[[File:6mm-Advanced-Rifle-Cartridge-6mm-ARC.png|left]]










== Performance ==
⚫
The cartridge makes use of 6&nbsp;mm (.243 in) [[bullet]]s, which are known for their high [[ballistic coefficient]]s due to the high [[sectional density]] with less [[drag (physics)|drag]] and better [[kinetic energy|energy]] retention at extended ranges. With the release in 2020, Hornady also launched three factory loads with {{cvt|103|,|105|and|108|gr|g}} bullet weights and advertised G1 ballistic coefficients of .512, .530 and .536 respectively.<ref>[https://www.all4shooters.com/en/shooting/ammunition/hornady-6-mm-arc-new-ar-15-caliber-features/ Brand new rifle caliber: 6 mm ARC, Hornady's Advanced Rifle Cartridge! | all4shooters]</ref>


The 6mm ARC is a medium-power cartridge comparable to the [[6.5mm Grendel]], but with better ballistics thanks to the greater muzzle velocity achieved by using lighter 6&nbsp;mm bullets and enough power to make use of the heavy 6&nbsp;mm bullets. Some have stated that it offers comparable ballistics to larger 6&nbsp;mm cartridges like the 6mm Creedmoor and [[.243 Winchester]], but out of a smaller cartridge, however this simply is not true when comparing muzzle velocities between them.<ref>{{cite web|url=https://www.loaddevelopment.com/6mm-creedmoor-hunt-and-competition/|title=6mm ARC vs 6mm Creedmoor|website=loaddevelopment.com}}</ref> What the 6mm ARC does offer though is almost comparable velocities and ballistic performance, but out of a compact cartridge that has less perceived recoil and fits into the standard [[AR-15]] length actions.


In addition to the above comments there is some confusion regarding the 6&nbsp;mm ARC's performance. This is because loading data given in some manuals such as the ''11th Edition Hornady Reloading Manual'',<ref>[https://www.hornady.com/reloading/handbook Hornady 11th Edition Reloading Manual]</ref> for example, has two sets of data. The first set of data is loaded to the SAAMI maximum average pressure (MAP) of 52,000 psi, which is stated to be suitable for gas-operated firearms such as the AR-15 platform and its derivatives. The second set of data is loaded to a MAP of 62,000 psi, which is stated to be for use with bolt action guns such as the [[CZ 527]]. The Hornady manual states that this second set of data should not be used in gas-guns. Due to the lower MAP, the performance of 6mm ARC ammunition loaded to gas-gun pressures will, on average, be less than firearms loaded to bolt action pressures when using the same barrel length. When using shorter barrels, which are common on gas-guns, the difference will be even more pronounced.


For example, the data in the Hornady 11th Edition Manual for an 18 in (457 mm)-barrelled AR-15 platform firearm was on average 200–300 ft/s (60–90 m/s) less than the data for the 24 in (610 mm)-barrelled CZ 527 bolt action rifle.


== SAAMI spec ==
{{Empty section|small=no|date=July 2024}}


⚫
== Compatibility with the AR-15 ==
⚫
For an ordinary AR-15 rifle chambered for the [[.223 Remington|.223 Rem]]/[[5.56mm NATO]], a new [[gun barrel|barrel]], [[magazine (firearms)|magazine]] and [[bolt (firearms)|bolt]] are required to convert to the 6mm ARC.<ref>[https://www.gunsamerica.com/digest/hornadys-new-6mm-arc-odin-works-barrels-first-field-tests/ Hornady's NEW 6mm ARC & Odin Work's Barrels - www.gunsamerica.com]</ref> The 6mm ARC utilizes the same bolt head size as the [[6.5mm Grendel]], and 6.5mm Grendel-compatible [[STANAG magazine|AR-pattern]] [[box magazine]]s have also been used successfully with the 6mm ARC.<ref>[https://gununiversity.com/6mm-arc-review/ gununiversity.com | 6mm ARC Released / Hands-On Testing and Comparisons, by Ryan Cleckner 3 June 2020]</ref> The 6mm ARC therefore can also be a suitable chambering for shorter "mini-action" [[bolt-action rifle]]s.{{Citation needed|date=September 2021}}


==See also==
== See also ==
⚫
* [[6.5 Grendel]]
* "[[6mm Optimum]]", a concept of a 6 mm cartridge bridging the gap between the 5.56×45mm NATO and 7.62×51mm NATO cartridge
* [[.223 Remington]]
* [[.223 Remington]]
* [[.224 Valkyrie]]
* [[6mm AR]]
* [[6mm AR]]
* [[6 PPC]]
⚫
* [[6.5mm Grendel]]


== References ==
== References ==

Revision as of 14:31, 15 July 2024

6mm Advanced Rifle Cartridge
Rifle cartridges (l. to r.) .308 Win, 6mm ARC, 300 AAC, .223 Rem
Rifle cartridges (l. to r.) .308 Win, 6mm ARC, 300 AAC, .223 Rem
TypCenterfire rifle
Place of originVereinigte Staaten
Production history
ManufacturerHornady
Produced2020–present
Specifications
Parent case.220 Russian/6.5mm Grendel[1]
Case typeRimless, bottleneck
Bullet diameter6.18 mm (0.243 in)[2]
Neck diameter6.96 mm (0.274 in)[2]
Shoulder diameter10.924 mm (0.4301 in)[2]
Base diameter11.201 mm (0.4410 in)[2]
Rim diameter11.20 mm (0.441 in)[3]
Rim thickness1.5 mm (0.059 in)[1]
Case length37.85 mm (1.490 in)[2]
Overall length57.40 mm (2.260 in)[2]
Case capacity2.20 cm3 (34.0 gr H2O)[citation needed]
Rifling twist190.5 mm (1:7.50 in)
Primer typeSmall rifle
Maximum pressure (SAAMI)358.53 MPa (52,000 psi)[2]
Ballistic performance
Bullet mass/type Velocity Energy
6.67 g (103 gr) ELD-X Precision Hunter 853.44 m/s (2,800.0 ft/s) 2,429 J (1,792 ft⋅lbf)
6.80 g (105 gr) BTHP BLACK 838.2 m/s (2,750 ft/s) 2,388 J (1,761 ft⋅lbf)
7.00 g (108 gr) ELD Match 838.2 m/s (2,750 ft/s) 2,459 J (1,814 ft⋅lbf)
Test barrel length: 610 mm (24 in)
Source(s): [4]

The 6mm Advanced Rifle Cartridge (6×38mm), or 6mm ARC for short, is a 6 mm (.243) caliber intermediate rifle cartridge introduced by Hornady in 2020, as a low-recoil, high-accuracy long-range cartridge, designed for use in the M16 platform at request of a specialized group within the U.S. DoD for its multipurpose combat rifle program.[4]

Performance

The cartridge makes use of 6 mm (.243 in) bullets, which are known for their high ballistic coefficients due to the high sectional density with less drag and better energy retention at extended ranges. With the release in 2020, Hornady also launched three factory loads with 103, 105 and 108 gr (6.7, 6.8 and 7.0 g) bullet weights and advertised G1 ballistic coefficients of .512, .530 and .536 respectively.[5]

The 6mm ARC is a medium-power cartridge comparable to the 6.5mm Grendel, but with better ballistics thanks to the greater muzzle velocity achieved by using lighter 6 mm bullets and enough power to make use of the heavy 6 mm bullets. Some have stated that it offers comparable ballistics to larger 6 mm cartridges like the 6mm Creedmoor and .243 Winchester, but out of a smaller cartridge, however this simply is not true when comparing muzzle velocities between them.[6] What the 6mm ARC does offer though is almost comparable velocities and ballistic performance, but out of a compact cartridge that has less perceived recoil and fits into the standard AR-15 length actions.

In addition to the above comments there is some confusion regarding the 6 mm ARC's performance. This is because loading data given in some manuals such as the 11th Edition Hornady Reloading Manual,[7] for example, has two sets of data. The first set of data is loaded to the SAAMI maximum average pressure (MAP) of 52,000 psi, which is stated to be suitable for gas-operated firearms such as the AR-15 platform and its derivatives. The second set of data is loaded to a MAP of 62,000 psi, which is stated to be for use with bolt action guns such as the CZ 527. The Hornady manual states that this second set of data should not be used in gas-guns. Due to the lower MAP, the performance of 6mm ARC ammunition loaded to gas-gun pressures will, on average, be less than firearms loaded to bolt action pressures when using the same barrel length. When using shorter barrels, which are common on gas-guns, the difference will be even more pronounced.

For example, the data in the Hornady 11th Edition Manual for an 18 in (457 mm)-barrelled AR-15 platform firearm was on average 200–300 ft/s (60–90 m/s) less than the data for the 24 in (610 mm)-barrelled CZ 527 bolt action rifle.

SAAMI spec

Compatibility with the AR-15

For an ordinary AR-15 rifle chambered for the .223 Rem/5.56mm NATO, a new barrel, magazine and bolt are required to convert to the 6mm ARC.[8] The 6mm ARC utilizes the same bolt head size as the 6.5mm Grendel, and 6.5mm Grendel-compatible AR-pattern box magazines have also been used successfully with the 6mm ARC.[9] The 6mm ARC therefore can also be a suitable chambering for shorter "mini-action" bolt-action rifles.[citation needed]

See also

References

  1. ^ a b Hornady 6mm ARC Cartridge - What You Need to Know
  2. ^ a b c d e f g "Public Introduction - 6.5 Creedmoor - 6mm-ARC-Public-Introduction-Rev-2020-06-18.pdf" (PDF). Archived from the original (PDF) on 2020-10-01. Retrieved 2020-07-24.
  3. ^ SAAMI (2020): 6mm Advanced Rifle Cartridge [6mm ARC]. Retrieved 2023-01-16.
  4. ^ a b 6mm ARC - Hornady Manufacturing, Inc
  5. ^ Brand new rifle caliber: 6 mm ARC, Hornady's Advanced Rifle Cartridge! | all4shooters
  6. ^ "6mm ARC vs 6mm Creedmoor". loaddevelopment.com.
  7. ^ Hornady 11th Edition Reloading Manual
  8. ^ Hornady's NEW 6mm ARC & Odin Work's Barrels - www.gunsamerica.com
  9. ^ gununiversity.com | 6mm ARC Released / Hands-On Testing and Comparisons, by Ryan Cleckner 3 June 2020
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