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The 7mm SAUM is a popular choice in f-class shooting, and has been used to take home multiple championships in this discipline. [ 2 ] [ 3 ] The 7mm Short Action Ultra Magnum cartridge (7mmx51) is a different cartridge than the similarly named 7mm Ultra Magnum (7mmx72).
7mm Remington Ultra Magnum; Type: Rifle: Place of origin: United States: Production history; Designer: Remington: Designed: 2002: Specifications; Parent case.300 ...
Winchester claims a muzzle velocity (MV) of 3,225 ft/s with a 140 grain bullet for their 7mm WSM cartridge; the claimed muzzle energy (ME) is 3,233 ft. lbs. With a 160 grain bullet the Winchester figures are 2990 ft/s and 3176 ft. lbs. at the muzzle. The lighter, shorter 7mm bullets are preferred in these short case magnums. [2]
7 mm Remington cartridges are all rifle cartridges with bullets of 7 millimetres (0.28 in) diameter developed and sold by Remington. These cartridges include: .280 Remington (7mm Express Remington) 7mm BR Remington (Bench Rest) 7mm Remington Magnum; 7mm Remington Ultra Magnum (RUM) 7mm Remington Short Action Ultra Magnum (SAUM) 7mm-08 Remington
Source(s): Accurate Powder [1] The 7mm Remington Magnum rifle cartridge was introduced as a commercially available round in 1962, [ 2 ] along with the new Remington Model 700 bolt-action rifle . It is a member of the belted magnum family that is directly derived from the venerable .375 H&H Magnum . [ 3 ]
Source(s): Reloading data at Accurate Powder .300 Remington Short Action Ultra Magnum (also known as 300 RSAUM, 300 RSUM or 300 Rem SAUM) is a .30 caliber short magnum cartridge that is a shortened version of the Remington 300 Ultra Mag, both of which derive from the .404 Jeffery case.
Lazzeroni's short magnums (7.21 Lazzeroni Tomahawk) were designed to operate in a short-action rifle, instead of requiring a long action. The U.S. Repeating Arms Company was the first major manufacturer to commercialize Lazzeroni's concept, followed shortly thereafter by Remington with their "Short Action Ultra Mag" line.
The 7mm-08 Remington is a rifle cartridge that is almost a direct copy of a wildcat cartridge developed around 1958 known as the 7mm/308. As these names would suggest, it is the .308 Winchester case necked down to accept 7 mm (.284) bullets with a small increase in case length.