For the 1906 ar 350 41 pdf rimless cartridge, see . 30 Remington AR cartridge was 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 .
It is a rebated rim cartridge designed to fit Remington’s R-15 semiautomatic hunting rifle. It was designed to fit the dimensional constraints of the AR-15 magazine and is based on a modification of the .
450 Bushmaster, which in turn was based on the . 30 Remington AR cartridge has a significantly wider diameter than the .
450 Bushmaster case, Remington trimmed the length to 1. 525″ from the original 1. 7″ and necked it down to accept a conical . 308″ diameter bullet with a 25 degree shoulder.
492″ 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.
With a 150 grain bullet, the round travels at 2575 fps. Remington is the only company which manufactures this ammunition and its components.
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.
30 RAR a cartridge suited to ranges around 300 to 400 yards where a larger calibre projectile is required. A side effect of the short, wide case has meant that the Remington R-15 Rifle which was designed alongside the cartridge uses a four-round, single-stack magazine.
Nischalke, Mike “The R-15 And The . The Gun Digest Book of The AR-15. Iola, Wisconsin: Gun Digest Books. Cartridges of the World: A Complete and Illustrated Reference for Over 1500 Cartridges.