.450/400 Black Powder Express

.450/400 Black Powder Express is a rifle cartridge or ammunition model.

In detail

.450/400 Black Powder Express is a rifle cartridge or ammunition model.

Sources

Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

reference work · Reputable secondary · Wikipedia
“.450/400 Black Powder Express”, English Wikipedia, consulted as further reading
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reference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q25100076: .450/400 Black Powder Express
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