None were chambered in 45LC. The Winchester 1873 was chambered in 32-20, 38-40 and 44-40. In 1878 Colt began producing its revolver in 44-40 as a companion to the 1873 Winchester of the same caliber. Later, the Winchester folks specifically asked John Browning to make a successor rifle to the 1873 Winchester. Basically a scaled down version of the 1886, but chambered in 44-40. 44-40 is a period correct cartridge. And hence the 1892 Winchester was invented.
[This message has been edited by Ned Roundtree (edited February 09, 2000).]