Winchester introduced the Model 1894 rifle in 1894, chambered in either .38-55 or .32-40. In 1895 1894 was chambered first for the .30WCF & then the .25-35, both with Nickel Steel barrels "Especially for Smokeless Powder". The .32 Win Special followed in 1902.
The .30-40 Krag was the first cartridge introduced in America as a Smokeless round which had not been preceded in a black powder loading.
The .30WCF was the first Sporting rifle cartridge introduced as strictly a Smokeless powder round. It has been duly recorded & known for some 125 years now that this occurred in "1895".
