.410 bore
.410 bore is a shotgun cartridge or ammunition model.
Also recorded as .410.
Overview
Shotgun bore designed by Charles Eley and William Eley.
In detail
.410 bore is a shotgun 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
“.410 bore”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q782168: .410 bore
Consult the source