|300 Remington Short Action Magnum (aka 300 Rem. SAUM)
Introduced in 2001 by Remington to compete against the Winchester 300 Short Action Magnum
(aka 300 WSM) both have about the same ballistics.
Based of a shortened and necked down 404 Jeffery, like many other calibers.
Up to 3,250 feet per Second and 3,500 foot pound per square inch of energy