The scout rifle is a class of general-purpose rifles defined and promoted by Jeff Cooper in the early 1980s.
These are typically bolt-action carbines chambered for .308 Winchester (or 7.62×51mm), less than 1 meter (40 inches) in length, and less than 3 kilograms (6.6 pounds) in weight, with iron and optical sights and fitted with practical slings (such as Ching slings) for shooting and carrying, and capable of hitting man-sized targets out to 450 meters without scopes. Typically they employ forward-mounted low-power long eye relief scopes or sights to afford easy access to the top of the rifle action for rapid reloading. Although the Steyr Scout is the only rifle Jeff Cooper has been personally involved with, Ruger, Savage, and several other gun makers now manufacture scout rifles that roughly match Cooper's specifications.
Cooper realized that rifles in the late 20th century differed little from those used by celebrated scouts such as Maj. Frederick Russell Burnham one hundred years before, and that advances in metallurgy, optics, and plastics could make the rifle a handy, light instrument "that will do a great many things equally well...". Cooper’s scout-rifle concept was largely influenced by the exploits of the scout Burnham in the Western United States and Africa and as such it is best suited to a man operating either alone or in a two or three man team.
"The general-purpose rifle will do equally well for all but specialized hunting, as well as for fighting; thus it must be powerful enough to kill any living target of reasonable size. If you insist upon a definition of 'reasonable size', let us introduce an arbitrary mass figure of about 1,000 lb (454 kg)."