B(ii) begs the question of just what is an "ordinary channel of commercial trade"? One example would be Buffalo Arms of Sandpoint, Idaho that manufacture a fairly wide selection of antique and obsolete cartridges.
They do make .45 Schofield, so would this exclude a replica Schofield (truly chambered) from "antique" status?

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Dean
SWCA #680 SWHF #446