|This article needs additional citations for verification. (May 2013)|
|.300 Remington American Magnum(7.62 x 65.5mm)|
|Place of origin||USA|
|Parent case||.404 Jeffery|
|Case type||Rimless, bottleneck|
|Bullet diameter||.308 in (Script error mm)|
|Neck diameter||.344 in (Script error mm)|
|Shoulder diameter||.525 in (Script error mm)|
|Base diameter||.550 in (Script error mm)|
|Rim diameter||.535 in (Script error mm)|
|Rim thickness||.050 in (Script error mm)|
|Case length||2.580 in (Script error mm)|
|Overall length||3.340 in (Script error mm)|
|Case capacity||105 gr H2O (6.825 cm³)|
|Primer type||Large rifle magnum|
|Maximum pressure||65,000 psi (Script error MPa)|
|180 gr (Script error g) X||3,056 ft/s (Script error m/s)||3,979 ft·lbf (Script error J)|
| Test barrel length: 26" (660 mm)|
Source(s): http://www.chuckhawks.com/375Dakota.htm, http://stevespages.com/jpg/cd375dakota.jpg
The .300, .338, .375 family of Remington American Magnums was designed by Aleksandr Kolesnikov of Houston, Texas, USA in February 2010. This was a response to the .375 Ruger. It is based upon the .300 RUM case, shortened to 2.580" to fit into Standard length Remington 700 action (firearm), while maximizing powder capacity by using .550" case diameter instead of Ruger's .532".
The RAM case family provides nearly the same performance as the RUM while generating less recoil and using less costly "standard" model 700 actions, rather than more expensive "magnum" actions. This offers a power level between the RUM and WSM cases, while employing sturdy, accurate, plentiful, relatively inexpensive 700 actions.
In 1999 Remington jumped on the current high performance bandwagon by creating their own beltless magnum. The .300 RUM was the first in a family of new Ultra magnum cartridges based on the .404 Jeffery, later joined by the 7 mm RUM, .338 RUM, and .375 RUM. In addition, Remington later created a shortened version called the Remington Short Action Ultra Magnums to compete with Winchester's line of Winchester Short Magnums.
Essentially a variant of the .375 Dakota, Aleksandr Kolesnikov named the .300 RAM in homage to the Remington Corporation. It is based on the .300 RUM shortened to fit in Remington 700-series Standard length actions. The acronym "RAM" is to specify that it is intended to be capable of taking any North or South American Game animals. Additionally, "RAM" alludes to the speeds attained by Ramjet aircraft engines.
The .300 RAM series cases utilize a larger case diameter than .375 Ruger based cartridge, while still fitting in Standard length Remington 700 action (firearm).
Because the .300 RAM is beltless, it headspaces on the shoulder giving it a potential edge in accuracy over belted magnums, in addition to longer case life. The rebated rim allows this cartridge to be used in an action with a magnum bolt faces (.535 inches).
|Cartridge||Bullet Weight||Muzzle velocity||Muzzle energy|
|.300 Win Mag||200||2822||3538|
|.300 Wby Mag||200||2987||3963|
|.30-378 Wby Mag||200||3160||4434|
|.300 Lapua Magnum||200||3200||4585|
- ↑ Script error