Definitions for ".25-20 Winchester"
The .25-20 Winchester, or WCF (Winchester center fire) was developed about 1895 for the Winchester Model 1892 lever action rifle. It was based on necking down the .32-20 Winchester. In the early 20th century, it was a premier small game and varmint round, developing around 2,200 ft/s with 60 grain bullets.