Uh guys a 275 Rigby is a 7x57 Mauser. Ruger made a fair # of #1s and 77s in that caliber. In fact I have a "one of one" 7x57 77 roundtip, almost new with a factory (employee rifle) fiddleback maple stock for sale.
"The cartridge was originally designed by Mauser of Germany in 1892. It is also often referred to as the 7 mm Mauser cartridge, and in the U.K. it is commonly called the .275 Rigby. By whatever name one wants to use, the cartridge originally featured a 175-grain bullet of modern design over enough smokeless powder to drive it to slightly more than 2,300 f.p.s. In the last years of the 19th century, the accuracy and the power of this new Mauser cartridge were widely acknowledged."
The Cooper shown is no 7x57, looks more like a 22 RF.
the Cooper is a 22 lr, shown only for the wood as its the same as we hope to have on the #1-A. The 7x57 is, of course, a 275 Rigby, however, these rifles will be marked 275 Rigby(that's the 'cool' part)
