.25-20 Winchester
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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.
It was easy and economical to reload, and was once a favorite with farmers, ranchers, pot hunters and trappers. Though the .25-20 was undoubtedly used on deer and the like with some success, this is not an advisable practice due to the sedate ballistics and light bullet construction associated with this cartridge.