Is a Winchester model 1873 made up through 1898 & chambered for the .44-40 an Antique by the BATF definition or not. My understanding is that it is so classified even though it fires a center fire cartridge which is still readily available. If it were made in 1899 or later it would not be considered an antique nor would any replica of it. On the other hand a replica of the .44 rimfire Henry would be because .44 Henry rimfire ammunition is not readily available.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra