Excuse me for this stupid question, but I would like to know the words to describe a shotshell in English and in American language.
Indeed depending of the documents I’ve found (British or US) and depending of the year people do not use the same terms !
Here is what I have read
the rim is the bottom part of the shotshell
Therefore I say : rim diameter.
(I have found a lot of documents saying head diameter)
(I don’t like that because it is confusing)
just above the rim I measure the base diameter
(people use head diameter or rear diameter or diameter under rim)
on the opposite side of the rim are measured the external and internal front diameters.
(people use mouth diameter and other forward or front or nose end diameter)
When they use mouth it is the internal daimeter, isn’t it ?
And how do they call the outside diameter ?
Conlusion: What are the good terms for:
the internal front part
the external front part