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.30 Remington AR

Rifle cartridge

Field	Value
name	.30 RAR (.30 Remington AR)
image	RAR+223 side.jpg	image_size = 200px
caption	Size comparison with .223
origin	United States
type	Rifle, Centerfire
design_date	2008
manufacturer	Remington
production_date	2008–present
parent	[.284 Winchester](284-winchester)
case_type	Rimless, bottleneck
base	.500
rim_dia	.492
rim_thick	.054
case_length	1.53
length	2.26
case_capacity	44
rifling	1:10
primer	Large rifle
max_pressure	55000
bw1	125
btype1	Corelokt
vel1	2800
en1	2176
bw2	125
btype2	AccuTip BT
vel2	2800
en2	2176
test_barrel_length	24
balsrc	http://accurateshooter.wordpress.com/2008/10/15/remington-introduces-new-30-remington-ar-cartridge/

The .30 Remington AR is an intermediate cartridge created in 2008 by Remington Arms to fill a perceived gap in performance on large game between the .223 Remington and larger cartridges such as the .308 Winchester. The design of the cartridge is considered a joint effort between companies under the "Freedom Group" name through a private equity firm

Remington was the only company that manufactured this ammunition and its components. The cartridge was a commercial failure and has been discontinued by Remington.

The .30 Remington AR cartridge has a significantly wider diameter than the .223 Remington

Design

Starting with a .450 Bushmaster case, Remington trimmed the length to 1.525 in from the original 1.7 and necked it down to accept a conical .308 in diameter bullet with a 25-degree shoulder.

The rim size is .492 in and because the round generates 55,000 psi, Remington opted to use a .308 rifle bolt in a 5.56-sized rifle for increased case support. The rim was widened from the .473 in of the parent case to prevent the use of a weaker .450 Bushmaster bolt with this cartridge. With a 150 grain bullet, the round travels at 2,575 feet per second (fps).

Performance

Performance tests between the .30 RAR and the .308 Winchester show that while the .30 RAR does have a good muzzle velocity, the energy it is capable of delivering on target at around 400 yards decreases significantly. Combined with the poorer ballistic coefficients of the lighter projectiles (.267 for the 125-grain Core-Lokt), this makes the .30 RAR a cartridge suited to ranges around 300 to 400 yards, although this can be extended with projectiles of higher ballistic coefficient (.341 for the Speer TNT 125 grain).

A side effect of the short, wide case is that the Remington R-15 rifle, which was designed alongside the cartridge, uses a four-round, single-stack magazine.

References

Nischalke, Mike "The R-15 And The .30 RAR", Shooting Times, [http://www.shootingtimes.com/long-guns/longgun_reviews_st_r15andthe30rar_200905/ Online Article], accessed 13 January 2010
Sweeney, Patrick. (2010). "The Gun Digest Book of The AR-15". Gun Digest Books.
Mann, Richard A.. (2014). "GunDigest Shooter's Guide to the AR-15". Krause Publications.
Woodard, W. Todd. (2016). "Cartridges of the World: A Complete and Illustrated Reference for Over 1500 Cartridges". F+W Media, Inc..
Zwoll, Wayne van. (29 November 2012). "Gun Digest Shooter's Guide to Rifles". Gun Digest Books.
(2008). "Remington Introduces new Remington 30 AR Cartridge". Accurate Shooter Bulletin.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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