Remington Arms Company
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7mm Remington Short Action Ultra Magnum Wikipedia
Remington introduced the 7mm Short Action Ultra Magnum (SAUM) cartridge in 2002 to compete with the 7mm Winchester Short Magnum cartridge. It was designed specifically for the Remington Model Seven Magnum rifle, and intended primarily for long-range hunting use. The difference in velocity between the 7mm SAUM cartridge and the 7mm Winchester Short Magnum (WSM) is less than 50 feet per second; they are almost ballistic twins. Both the 7mm SAUM and the 7mm WSM achieve optimal ballistic results when using bullet weights from 120 to 160 grains.
More recently, the 7mm SAUM has suffered from decreased popularity, resulting in fewer manufacturers chambering rifles in this caliber. Low demand for factory ammunition in 7mm SAUM has resulted in a sharp increase in the cost of 7mm SAUM as of mid 2014.