 In 1876, the Winchester Repeating Arms Company came out with its Centennial model, chambered in the powerful .45-60 cartridge. .45-60 meant a .45 caliber bullet over a charge of 60 grains of black powder. Listen to the brass lifter as I work the action. Now I'll slide the dust cover forward. You may see the 76 at Frontier Guns, 3156 East Grant Road, where they've been since 1971.