DEMIGOD LLC has an interesting article on the .260 Remington, a necked down .308.
The .260 Remington provides long-range ballistics conventionally limited to the magnum calibers. Because its parent case is the ubiquitous .308 Winchester, building a rifle in .260 can be as easy as fitting a new barrel. The .260 provides much less wind drift and drop than .308 but has less recoil.
The hunting pedigree of 6.5 mm in Europe proves the caliber is formidable for practical use. For long-range shooters who want a better cartridge than .308, but don’t want the costs associated with big overbore magnums, the .260 is just the ticket.