There are many items to consider, commencing by usage and cost (in ample sense). Give a look at the Winchester Ammunition site linked below.
the ammunition would be the 25-20 Winchester center fire (25-20 WCF). ammunition is still manufactured by Winchester for this rifle.
Your rifle is a Model 94, named for the year of introduction, 1894. 30 WCF is the correct name of the ammunition it fires, .30 caliber Winchester Center Fire, the original name for the .30-30 cartridge.
We need to know the model, possibly the serial number, and definitely the CONDITION to estimate a value. 30 WCF just tells us what ammunition to buy for it.
The chambering will be stamped right into the barrel.Since it's a 94, it will probably be stamped 30 WCF (Winchester Center Fire) which today is called 30-30 Winchester
The Model 1892 Winchester lever action rifle was made in .218 Bee, .25-20 WCF, .32-20 WCF, .38-40 WCF, and .44-40 WCF. (WCF is Winchester Center Fire). Godbear Tennessee
Your winchester model 1894 was produced by winchester in 1924.
According to your serial number ..Your lever action was Manufactured in 1930. The letters wcf: Winchester Center Fire
your Winchester model 1894 was made in 1941.
your Winchester model 55 was produced in 1926.
Winchester discontinued putting the WCF markings on there model 1894 rifles after World War II.
Your winchester model 1894 was made by winchester in 1924.
your Winchester model 1894 was produced in 1949.